2026-05-19T10:59:33Z https://ijeise.upnjatim.ac.id/index.php/ijeise/oai

oai:ojs2.ijeise.upnjatim.ac.id:article/29 2024-05-14T04:34:43Z ijeise:ART driver

The Effect of Resin and NH4OH Addition in The Making of Ammonium Silica Fertilizer from Geothermal Sludge Wahyusi, Kindriari Nurma Nandini, Atika Utami, Lucky Indrati Siswanto Utami, Isni Mardhiyah, Nurul Nofita, Dian Extraction, Geothermal Sludge, Resin, Ammonium Silica Geothermal sludge is a waste product from geothermal where it contains SiO2 which can be used as fertilizer. In this study, the making of silica ammonium fertilizer was carried out by taking salicy acid from geothermal sludge by extracting and adding resin which was then modified with NH4OH addition. Extraction was done using 1000 ml of KOH 1 N to dissolve 60 grams of Geothermal Sludge. Resins are added with variations in resin weight, namely, 5, 10, 20, 30, and 40 grams. NH4OH was added with variations in concentrations namely 3, 6, 9, 12 and 15% with a ratio of filtrate and NH4OH solution of 1: 1. The resulting ammonium silica inorganic liquid fertilizer products were analyzed for free silica and ammonia levels. The results of this study indicate that the levels of free silica and ammonia are influenced by the weight of the resin used and the concentration of ammonium hydroxide mixed. From the results of the research, it was found that inorganic silica liquid fertilizer with the highest SiO2 content in ammonium silica liquid fertilizer occurred when adding 20 grams of resin with the addition of NH4OH with a concentration of 15% which was 1,831.87 mg / L while the highest NH3 content in fertilizer liquid ammonium silica occurs when adding 40 grams of resin with the addition of NH4OH with a concentration of 15% which is equal to 252,312.80  mg / L. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/29 10.33005/ijeise.v2i01.29 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 1 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/29/40 Copyright (c) 2024 Kindriari Nurma Wahyusi, Atika Nandini, Lucky Indrati Utami, Siswanto, Isni Utami, Nurul Mardhiyah, Dian Nofita https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/34 2024-05-14T04:34:43Z ijeise:ART driver

Study on Factors Affecting Physicochemical Properties of Spray Dried Mango Powder Using Taguchi Experimental Design Approach Kongpichitchoke, Teeradate Gnoumou, Edouard Noomhorm, Athapol Ho – Hsien, Chen Mango powder, Spray drying, Taguchi approach, physicochemical property Mango is a common fruit in tropical countries. Due to its short shelf-life, it is important to study alternative preservation and consumption methods. In this study, concentrated mango juice was used to produce mango powder by using spray drying process. Four process parameters with three levels variation each, including initial total soluble solid content (13, 14, 15◦Brix), maltodextrin content (20, 25, 30% w/w), inlet air temperature (170, 190, 210◦C), and atomization pressure (4, 5, 6 bar) were studied. Taguchi approach of L-9 (34) array was used to design the experiments.  Powder yield, moisture content, color difference, and solubility of the mango powder were investigated. It was found that maltodextrin content was the greatest factor affecting powder yield and color difference. The highest powder yield was 31.81%, and the least color difference (∆E) was 3.17. Inlet air temperature and atomization pressure were the most important factor affecting to moisture content and solubility, respectively, in which average moisture content was 2.98% (w.b.) and the highest solubility value was 94.66%. For the overall production process, it was concluded that maltodextrin content was the most important parameter, while total soluble solid content provided the least impact on spray dried mango powder properties. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/34 10.33005/ijeise.v2i01.34 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 1 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/34/41 Copyright (c) 2024 Teeradate Kongpichitchoke, Edouard Gnoumou, Athapol Noomhorm, Chen Ho – Hsien https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/35 2023-09-20T08:15:18Z ijeise:ART driver

REDUCING PEROXIDE VALUE IN USED COOKING OIL USING AMPO AS AN ADSORBENT Susilowati, S. Astya, Khanza Lolita Bachri, Ulinnuha Syaiful Adsorpsition, Ampo, Peroxide value, and Used cooking oil Cooking oil can only be used two or three times, more than that the oil is deemed unsuitable and can harm our health. The reason is, every time the cooking oil is used for frying, an oxidation reaction that is triggered by heat occured and causes the chemical chain bonds in cooking oil become unstable and forms hydroperoxides. The hydroperoxide found in used cooking oil increases the peroxide value. In which, the suitability of cooking oil is based on the peroxide value. In order to reduce the peroxide value in used cooking oil, in this study, Ampo is used as an adsorbent to adsorb the peroxide compound. The procedure used in this study includes a preliminary analysis of the used cooking oil to determine the initial peroxide value. After that, the Ampo adsorbent is activated with 1N Citric Acid to open the pores on the surface of the Ampo. Activated Ampo will then be mixed into 200 ml of used cooking oil with a magnetic stirrer with a stirring speed of 300 rpm and with a temperature of 50oC. The adsorption process was carried out by varying the mass variables of Ampo into 70, 75, 80, 85, and 90 grams, and stirring time of 30, 60, 90, 120, and 150 minutes. After the adsorption process is completed, the cooking oil that has been filtered by the Ampo adsorbent will be analyzed to get the final peroxide value. By knowing the peroxide value before and after the adsorption process, the adsorption isotherm can be calculated. The adsorption process of used cooking oil with Ampo adsorbent proved to reduce the peroxide value, in which stirring times and adsorbent masses were the influential variables in the study. The best result was obtained with 60 minutes stirring time and mass of 75 grams. This condition provided a peroxide value of 0.99 meq/kg, which means that there was a decrease in the peroxide value by 93%. This result is in accordance with the provisions of SNI 3741-2013, with a maximum peroxide value of 10 meq/kg. The maximum adsorption capacity in this study was obtained from the Freundlich equation of 14.6487 mg/gram. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/35 10.33005/ijeise.v2i02.35 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 2 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/35/43 Copyright (c) 2023 S. Susilowati, Khanza Lolita Astya, Ulinnuha Syaiful Bachri https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/36 2024-05-14T04:34:43Z ijeise:ART driver

Warehouse layout Design in Manufacturing Industry Tranggono Rahmawati, Nur Hayati, Kinanti Resmi Warehouse, Redesigning, Dedicated storage, Layout distance Manufacturing companies spend a significant amount of time and money designing or redesigning their facilities. It is an extremely important function that must be addressed before products are produced. Manufacturing company’s common problem is that they do not have a pattern for placing goods in their warehouse. It leads to problems such as difficulties when taking the product from storage. With storage procedures like this, it can make long total distance for loading and unloading the goods. Dedicated storage policy where storage is done at a certain location according to the type of item needs to be made. The advantage of this method is ease in finding goods as the location can be tailored to the shape of the goods. The research results show an efficiency of the displacement distance of 4117 m, the initial layout distance of moving goods is 5740 m, while in the proposed layout it is 1622 m. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/36 10.33005/ijeise.v2i01.36 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 1 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/36/42 Copyright (c) 2024 Tranggono, Nur Rahmawati, Kinanti Resmi Hayati https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/40 2023-09-20T08:15:18Z ijeise:ART driver

The Utilization of Lapindo Mud Waste for Aluminium Sulfate Production Utami, Lucky Indrati Rizaldi, Tahan Simamora Wahyusi, Kindriari Nurma Nugraha, Reva Edra Lapindo mud, aluminum sulfate, heating time, H2SO4 concentration The Lapindo mudflow disaster in East Java Province, or also known as LUSI (LUmpur “mud”-SIdoarjo) has become spectacular longest ongoing disaster in recent memory since 2006. The utilization of volcanic Lapindo mud could be the promising solution to prevent further environmental damage. The chemical composition of Lapindo mud contained of 44.1% SiO2, 23.7% Fe2O3, 13% Al2O3, 7.02% CaO, 5.35% MoO3, 2.53% K2O, 1.84% TiO2 and 0.7% Na2O. Aluminium sulfate (Al2(SO4)3) or “alum” have been widely used as coagulation compound in water treatment, paper and textiles industry. Aluminium sulfate can be synthesized from aluminium oxide (Al2O3) from Lapindo mud with acidic solutions (H2SO4). The aim of this work was to synthesize aluminum sulfate from Lapindo mud by using extraction process. The impact of H2SO4 concentration and heating time to the production of aluminium sulfate have been investigated. The results showed that the aluminium sulfate can be synthesized from Lapindo mud by using H2SO4. Based on XRF analysis, the variation of heating time and H2SO4 concentration affect the aluminium sulfate conversion. The increasing of heating time and H2SO4 concentration directly enhance the conversion until reach the optimum condition. The optimum condition for aluminium sulfate synthesis from Lapindo mud (75.78% conversion) was found to be 90 min for heating time with H2SO4 concentration of 80%. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/40 10.33005/ijeise.v2i02.40 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 2 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/40/44 Copyright (c) 2023 Lucky Indrati Utami, Tahan Simamora Rizaldi, Kindriari Nurma Wahyusi, Reva Edra Nugraha https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/41 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/41 2024-05-14T04:43:00Z ijeise:ART driver

Kinetic models of candle shell alkaline hydrolysis in obtaining oxalic acid Siswanto Wahyusi, Kindriari Nurma Panjaitan, Renova Nurmawati, Ardika Najakha, Ellen Oktavia Hanim Alkaline hydrolysis, candlenut, kinetic reaction, oxalic acid, shrinking core model. The kinetic reaction of alkaline hydrolysis of candlenut shells to produce oxalic acid was investigated. It was performed for the non-catalyzed solid-liquid heterogeneous reaction in a range time of 30 to 90 minutes and temperature of 60oC to 90oC. This study showed that the reaction fitted the pseudo-first-order model, confirmed from the determinant coefficient value of 0.9182 to 0.9751, and the kinetic constant, evaluated using Arrhenius' law, was k= 0.034751 e^(-140.23⁄T). The rate control mechanism based on the shrinking core model was diffusion control, validated from determinant coefficient near one, from 0.9246 to 0.9766. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/41 10.33005/ijeise.v3i01.41 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/41/61 Copyright (c) 2023 Siswanto, Kindriari Nurma Wahyusi, Renova Panjaitan, Ardika Nurmawati, Ellen Oktavia Hanim Najakha https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/42 2023-09-20T08:15:18Z ijeise:ART driver

Study of Proportion of Milk with Lesser Yam Filtrate and Starter Concentration for Producing Synbiotic Yoghurt Rosida Santi, S.S. Rohman, F.R. yoghurt, synbiotic, milk, lesser yam, inulin This study aimed to determine the effect of the proportion of cow's milk with lesser yam filtrate andstarter concentration on the characteristics of synbiotic yoghurt. The research used a factorial completely randomized design (CRD) with two factors, factor I was the proportion of cow's milk with lesser yam filtrate (100:0; 60:40; 50:50; 40:60; 0:100) and factor II was the starter cocentration (3%, 5%, 7%). The data obtained were analyzed using analysis of variant (ANOVA) and if there was a significant difference between treatments, then continued with Duncan's test at the 5% level. Synbiotic yoghurt from proportion of cow's milk with lesser yam filtrate (50:50) and 5% starter concentration was the best treatment with total Lactic Acid Bacteria of 7.23 log CFU/ml; pH 4.20; total dietary fiber 3.05%, soluble fiber content 1.3%, inulin content 1.2%, fat content 0.41% and soluble protein content 2.66% with an average texture preference score of 6.13 (like much); taste core 6.02 (like much) and smell score5.20 (like). UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/42 10.33005/ijeise.v2i02.42 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 2 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/42/45 Copyright (c) 2023 Rosida, S.S. Santi, F.R. Rohman https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/44 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/44 2024-05-14T04:43:00Z ijeise:ART driver

IMPROVING ENGLISH LEARNING FOR KINDERGARTEN STUDENTS THROUGH COMMMA APPLICATION IN NEW NORMAL ERA Hayati, Kinanti R. Prastiwi, Afita D. Donoriyanto, Dwi S. Tranggono Sasmito, Zinedine A. English, kindergarten students, Comma Application, TPR. English is one of international languages for connecting and sharing knowledge throughout the world. As regulated in the national standards of early childhood education (PAUD), language is one of the measurement criteria in the early childhood education system. The aim of this research is to assist schools in improving human resources by providing training on English teaching methods with the Total Physical Response (TPR) method and English teaching applications with the android-based application called Comma. we collaborated with partners to design and create Comma application concept and system. The aim of this program is improving the quality of human resources in terms of teaching English for kindergarten students. The test results state that all operations can be performed on this Comma application which shows the system operated as expected or it can be said that the system testing is successful so that the Comma application is ready to be released and used by users who need this application to improve their English skills through the TPR method. With the Comma application, it can be used to improve understanding of the English language, especially in early childhood education and can be used as a good alternative in teaching English in the early childhood education environment. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/44 10.33005/ijeise.v3i01.44 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/44/48 Copyright (c) 2023 Kinanti R. Hayati, Afita D. Prastiwi, Dwi S. Donoriyanto, Tranggono, Zinedine A. Sasmito https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/46 2023-09-20T08:15:18Z ijeise:ART driver

Influence of Enzyme Concentration and Hydrolysis Time on Soluble Protein Content of Protein Hydrolysate Prepared from Apple Snail (Pila ampullaceal) Putra, Andre Yusuf Trisna Rosida, Dedin Finatsiyatull Priyanto, Anugerah Dany protein hydrolysate, trypsin enzyme, snail. The objective of this study was to evaluate soluble protein content of protein hydrolysates obtained by enzymatic hydrolysis of apple snail using a trypsin enzyme. Apple snail were collected from traditional market at Pabean-Sidoarjo. Trypsin enzyme was used in enzymatic hydrolysis. The two variables, enzyme/substrate (E/S) ( 0.01, 0.05, 0.1) ratio and hydrolysis time (3 h, 6 h, 9 h, 12 h, 15 h, 18 h) and was used to produce the apple snail hydrolysate. The result showed that soluble protein content was about 2.3%-4.52%. The increase E/S ratio and hydrolysis time, the higher soluble protein content values was. The highest total soluble protein was achieved E/S 0.1 ratio at 12 h, 4.52%. But, after 12 h hydrolysis time, soluble protein was decreased. Optimum treatment to hydrolyzing apple snail using trypsin enzyme was E3H4 treated (E/S 0.1 ratio and 3 h) UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/46 10.33005/ijeise.v2i02.46 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 2 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/46/46 Copyright (c) 2023 Andre Yusuf Trisna Putra, Dedin Finatsiyatull Rosida, Anugerah Dany Priyanto https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/47 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/47 2024-05-14T04:43:00Z ijeise:ART driver

Corrosion Inhibition Effect of the Essential Oil of Dried and Fresh Crystal Seedless Guava Leaves (Psidium guajava) in Acid Medium Suprianti, Lilik Erliyanti, Nove Kartika Pujiastuti, Caecilia Psidium guajava, essential oil, extraction, microwave hydrodistillation, corrosion inhibitor This research studied the corrosion inhibition activities of the essential oil of crystal seedless guava leaves (Psidium guajava) in an acid medium. The essential oil (EO)  was extracted from the different treatments of raw materials (fresh and dried leaves) using the microwave hydrodistillation method with a power of 600 Watt. Water was used as the solvent, with the ratio of feed to solvent (w/v)  1:7. The extraction duration was over 3 hours. The extraction process was done at atmospheric pressure and 100oC. Different raw material treatments result in different yields, where the highest yield was obtained from the dried leave, with the value reaching 1.08%. The essential oil chemical compound was determined by GC-MS analysis. The main component obtained were caryophyllene (44.98%) and  Caryophyllene oxide (14.96%). The essential oil was applied as a corrosion inhibitor for carbon steel in a 1 M Hydrochloric acid (HCl) medium. The inhibition efficiency (IE) was 67% at a concentration of 0.3g/L, while the fresh leaves essential oil was only 63%. The dried leave EO performs a higher anti-corrosion effect than the fresh leaves EO. These results show crystal seedless guava leaves' essential oil has anti-corrosion activities on carbon steel in an acid medium. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/47 10.33005/ijeise.v3i01.47 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/47/49 Copyright (c) 2023 Lilik Suprianti, Nove Kartika Erliyanti, Caecilia Pujiastuti https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/48 2023-09-20T08:15:18Z ijeise:ART driver

Mass Balance Analysis of Bioethanol Production from Petai Peel (Parkia speciosa) through Enzymatic Process Saputro, Erwan Adi Yogaswara, Rachmad Ramadhan Arviana, Nerissa Aini, Luckyana Sunarti, A.R Yelvia Nugraha, Reva Edra Bioethanol, Petai peel, Mass Balance Analysis The consumption of fuel for transportation is increasing during the last decade. Bioethanol is one of the renewable energy has a good opportunity to be applied when the lack of fossil fuel. Bioethanol is derived from the lignocellulose substance through a fermentation process. In this research, the lignocellulose came from the petai peel (Parkia speciosa). The peel was hydrolyzed using an enzyme and continuously fermented for 5 days. The aim of this research is to analyst the mass balance of the bioethanol production from petai peel (Parkia speciosa) through the enzymatic process. The enzyme used in this research are alfa amylase (10 ml) and glucoamylase (10 ml), also Saccharomyces cerevisiae used in the fermentation process. The result shows that the initial material of petai peel was 57 grams will produce bioethanol around 14 grams. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/48 10.33005/ijeise.v2i02.48 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 2 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/48/47 Copyright (c) 2023 Erwan Adi Saputro, Rachmad Ramadhan Yogaswara, Nerissa Arviana, Luckyana Aini, A.R Yelvia Sunarti, Reva Edra Nugraha https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/52 2024-05-14T04:57:54Z ijeise:ART driver

The Effect of Velocity Gradient and Camp Number on Solids Removal using Bio-Coagulant from Corbula faba Hinds Shells Nurmawati, Ardika Wahyusi, Kindriari Nurma Dewati, Retno Hilmy, Jauhar Camp Number, Chitosan, Coagulation, Solids, Velocity gradient process in water helps reduce solid content in water. The coagulant destabilizes water pollutants and helps flocs formation with the coagulation process. This paper studies the performance of chitosan bio-coagulant produced from Corbula faba Hinds shells. The velocity gradient and the Camp number of solids removal were also evaluated. The velocity and period of rapid mixing varied from 110 to 150 rpm, and the velocity gradient (G) was 181.2 to 288.5 s-1. The mixing period also ranged from 1 to 5 minutes. The highest TSS and TDS removal resulted in 140 rpm or 260.2 s-1 and 4 minutes of mixing. The residual TSS and TDS decreased with the increase of Camp Number until reaching a point and increased again afterward. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/52 10.33005/ijeise.v3i02.52 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 2 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i02 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/52/56 Copyright (c) 2024 Ardika Nurmawati, Kindriari Nurma Wahyusi, Retno Dewati, Jauhar Hilmy https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/54 2024-05-14T04:43:00Z ijeise:ART driver

A brief review of C-Dots preparation using top-down and bottom-up approaches Fauziyah, Nur Aini C-Dots, arc-discharge, laser ablation techniques, simple heating methods, and microwave This review paper aimed to reveal several methods that have been used in the preparation of carbon dots (C-Dots). C-Dots were principal to be studied because they have luminous properties that can be used in photocatalyst processes, heavy metal sensors, glowing paints, and nanoparticles for biomedical applications such as bio-tagging. The methods that have been developed were also varied using the two principal approaches, i.e., top-down and bottom-up. Here, we tried to reveal the arc-discharge, laser ablation techniques for top-down approaches, while simple heating methods (simple hydrothermal methods), and microwave for bottom-up. Furthermore, the microwave method was excellent because of the vibration process which caused the carbon chains to undergo rearrangement so that the result was not much reducing the water content in the solution. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/54 10.33005/ijeise.v3i01.54 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/54/51 Copyright (c) 2023 Nur Aini Fauziyah https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/54 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/55 2024-05-14T04:43:00Z ijeise:ART driver

Synthesis and Modification of Nano-Precipitated Calcium Carbonate (PCC) with Addition of Ethylene Glycol Sani Rosilina, Mega Maulana, Mochamad Titus Sunarti, A.R Yelvia Muljani, Srie Astuti, Dwi Hery Utami, Isni ZA fertilize waste, Nano Precipitated Calcium Carbonate (PCC), Coprecipitation, Ethylene Glycol ZA fertilizer waste (Ammonium sulfate) is waste generated from the industrial process of producing ZA fertilizer. The waste contains very high calcium and has the potential to be used as a raw material in the manufacture of Precipitated Calcium Carbonate (PCC). PCC with certain qualities can be developed in the field of advanced materials, with size modification into nanoparticles. One method to produce nanoparticles is using the coprecipitation method, with the help of a polymer solution. This study aims to produce Nano-PCC by finding the best conditions of CaCl2: Ethylene Glycol mole ratio and stirring speed. Nano-PCC is synthesized by reacting fertilizer waste with HCl to form a CaCl2 solution. Then,  the solution is mixed with ethylene glycol to prevent particle agglomeration so that the size obtained will be smaller. The mixture is then reacted with Na2CO3 to form precipitated calcium carbonate (PCC). In this study, the variables were the mole ratio of CaCl2: ethylene glycol (1:12, 1:14, 1:18, 1:20) and stirring speed (350, 500, 650, 800, and 950 rpm). Based on PSA analysis, the Nano-PCC obtained at the smallest CaCl2: ethylene glycol ratio 1:12, stirring speed 950 rpm was 51.83 nm. Based on Scherrer’s calculations with XRD, the particle size obtained was 48.25 nm. SEM analysis showed that the crystals formed were dominated by vaterite crystals, with a size range of 55.71-607.79 nm. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/55 10.33005/ijeise.v3i02.55 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/55/53 Copyright (c) 2023 Sani, Mega Rosilina, Mochamad Titus Maulana, A.R Yelvia Sunarti, Srie Muljani, Dwi Hery Astuti, Isni Utami https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/55 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/56 2024-05-14T04:57:54Z ijeise:ART driver

Chemical Characteristics of Banana-Blueberry Velva Product with Various Concentrations of Carboxymethyl Cellulose (CMC) Isnaini, Yolandra Hibatullah Defri, Ifwarisan Jariyah banana, blueberry, CMC, Velva The aim of this research was to analyze the chemical characteristics of Velva products from the mixture of bananas and blueberries with the addition of CMC. This study used a two-factorial completely randomized design with the first factor being the proportion of bananas and blueberries (40:60, 50:50 and 60:40). The second factor was concentration of CMC (0.1, 0.3 and 0.5%). Chemical analysis in this research included total acid, vitamin C, antioxidant activity, crude fiber content, protein, and fat. The data were analyzed by ANOVA using SPSS version 26 with Duncan Multiple Range Test at 5 % probability level. The best results based on the best chemical characteristics were obtained in the treatment of banana and blueberry proportions of (40:60) and CMC concentration of (0.5%) which had characteristics 0.613% total acid, 7.627 mg/100g vitamin C, 42.893% antioxidant activity, 4.450% crude fiber, 3.657% protein and 0.127% fat. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/56 10.33005/ijeise.v3i02.56 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 2 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i02 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/56/55 Copyright (c) 2024 Yolandra Hibatullah Isnaini, Ifwarisan Defri, Jariyah https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/58 2024-05-14T04:43:00Z ijeise:ART driver

Analysis of bio-briquette preparation from teak tree (Tectona grandis Linn. f) Panjaitan, Renova Syaputra, Ian Yusuf Natanaelli, Cintaka Utami, Lucky Indrati Wahyusi, Kindriari Nurma ANOVA, biomass energy, carbonization, calorific value, solid fuel The government has taken energy deflation seriously and is trying to find solutions by implementing energy efficiency and utilizing renewable energy sources. That action also supports the procedure to save the world from the ongoing climate crisis. One of Indonesia’s potential renewable energy sources is biomass, which can be in the form of plantation waste such as teak branches. Based on the analysis results, charcoal made from teak branches had a carbon content about 62.5968%, so it was pretty potential to be used as raw material for bio-briquettes. In this research, bio-briquette from teak branches' charcoal using tapioca binder has been successfully carried out. The manufacture of bio-briquettes was studied by observing the effect of the size parameters of teak charcoal and binder ratio on the heating value and water content of briquettes. The analysis results showed that these two parameters significantly affected the quality of teak branches' bio-briquette. In the ranking, the particle size was much more significant in influencing the calorific value of bio-briquettes, while the binder ratio had more influence on the water content value. The obtained bio-briquettes' calorific value and water content have met the established standards. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/58 10.33005/ijeise.v3i01.58 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/58/50 Copyright (c) 2023 Renova Panjaitan, Ian Yusuf Syaputra, Cintaka Natanaelli, Lucky Indrati Utami, Kindriari Nurma Wahyusi https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/58 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/61 2024-05-14T04:43:00Z ijeise:ART driver

Optimization ZnO Properties for Electron Transport Layer (ETL) of Hybrid Solar-cell Prepared with Sol-gel Method Combined with Reflux Treatment Tola, Pardi Sampe sol-gel, reflux, ZnO powder, electron transport layer (ETL). Electron-hole pair (exciton) generation and extraction from solar-cell photoactive layer is the main parameters determined solar-cell performance. Generally solar-cell consists of a photoactive layer sandwiched between electron transport layer (ETL) and hole transport layer (HTL). Exciton separation and extraction from photoactive layer depend on several properties: energy level match of photoactive layer and charge transport layer, surface contact area of photoactive layer and charge transport layer, and charge transport properties of charge transport layer. ETL and HTL should meet several characteristic e.g.: high transparency in UV-visible light region, high degree of crystallization to minimize charge lose and high electron or hole mobility. In this study we try to fabricate ZnO as an ETL of hybrid solar-cell with sol-gel method combined with reflux treatment. The quality of ZnO ETL highly effected by precursor solution properties; solution homogeneity, viscosity and stability. These precursor solution properties depend on chemical composition and reaction condition, reflux treatment designed to enhance precursor solution reaction time and increase solution stability. Previous study shown low solution stability of ZnO precursor prepared with sol-gel without reflux treatment which resulting on low ETL quality. Visible observation of the resulting precursor solution showed that reflux treatment enhances solution stability, while solution prepared without reflux treatment easily formed precipitation phase. Furthermore, ZnO powder prepared with reflux treatment exhibit preferable crystallization and small ZnO crystallite size. Low-temperature crystallization of ZnO prepared with sol-gel method combined with reflux treatment, make it is possible to fabricate thin film with small particle size therefore able to enhance surface contact area of photoactive layer and ETL. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/61 10.33005/ijeise.v3i01.61 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/61/52 Copyright (c) 2023 Pardi Sampe Tola https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/61 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/63 2024-05-14T04:43:00Z ijeise:ART driver

Catalytic Decomposition of Azo Dye Using ZnO in Sunlight Pachwarya, Ram Babu Hidayah, Euis Nurul Kashyap, Dr. Rekha Ramanathan, A.L. Meena, R.C. Meena, Pramod Kumar Nisa, Syadzadhiya Q.Z. catalyst, zinc oxide, photocatalysis, non-degradable, water pollutants, azo dye The degradation of azo is a challenge for environmentalists. Catalytic decomposition of azo dyes by ZnO heterogeneous photocatalysis and the influence of operating parameters such as light intensity, temperature, amount of ZnO catalyst, solution pH and amount of pollutants. It has been observed that ZnO catalysts is quite capable of removing azo dyes in the presence of sunlight. We can use the same catalyst over and over, and it works well every time. We recovered 99% clear water within a few hours of exposure to sunlight. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/63 10.33005/ijeise.v3i01.63 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 1 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i01 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/63/54 Copyright (c) 2023 Ram Babu Pachwarya, Euis Nurul Hidayah, Dr. Rekha Kashyap, A.L. Ramanathan, R.C. Meena, Pramod Kumar Meena, Syadzadhiya Q.Z. Nisa https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/63 2024-05-14T04:41:27Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/67 2024-05-14T04:57:54Z ijeise:ART driver

Chemical Characteristics, Antioxidant Activities, and Lead (Pb)-Chelating Ability of Powdered Drinks made from Coriander (Coriandrum sativum) Leaves Extract Winarti, Sri Sanjaya, Yushinta Aristina Pertiwi, Cici Nagita antioxidant, coriander, metal-chelating, maltodextrin, powder drinks Coriander is one of the natural antioxidant sources that can be used as chelating agent of heavy metals, such as lead (Pb) due to the presence of its phenolic compounds. However, the coriander has only been used as one of the spices on some dishes, and the other potential benefits have not been widely explored. Therefore, the processing of coriander leaves into a ready-to-drink (RTD) powdered beverage would be one of the ways to utilize the coriander. The objective of this study was to analyze the effect of drying temperature and maltodextrin concentration on product quality of powder drink. This study applied a complete randomized design of factorial pattern with two factors. The first factor was the drying temperature of 40oC, 50oC, and 60oC, while the second factor was the addition of maltodextrin as filler with the concentration of 5%, 10%, and 15%. The optimum treatment was observed at drying temperature of 40oC with maltodextrin concentration of 15%, yielding powder drink with water content of 4.19%; solubility of 89.92%; total phenol of 131.93 mg TAE/g; primary antioxidant activity of 47.05%; secondary antioxidant activity of 79.30%; and Pb reduction ability of 95.36%. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/67 10.33005/ijeise.v3i02.67 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 2 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i02 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/67/57 Copyright (c) 2024 Sri Winarti, Yushinta Aristina Sanjaya, Cici Nagita Pertiwi https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/69 2023-09-20T08:02:17Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/72 2024-05-14T04:57:54Z ijeise:ART driver

Synthesis of Hydrosiapatite from Muscle Shell Waste Using The Precipitation Method Puspitawati, Ika Nawang Tauhid, Aziz Hafizh M.N.K, Abdullah Tsani Utami, Lucky Indrati Wahyusi, Kindriari Nurma Hydroxyapatite, Precipitation, Temperature, Concentration Hydroxyapatite is a calcium phosphate compound that is the main inorganic component of bones and teeth. Hydroxyapatite has a main role in the medical world because of its identical chemical properties and structure to human bone. Kupang shells have a high CaCO3 content of 95-99% by weight. So this concurrence, the mussel shells are to be used as good as an ingredient for making Hydroxyapatite. The variables used in this research are Temperature of the Furnace and Phosphoric Acid Concentration, which were 700ºC, 750 ºC, 800 ºC, 850 ºC, 900 ºC and Phosphate Acid Concentrations 0.4M, 0.6M, 0.8M, 1M, and 1.2M. The product results were tested with XRD analysis to determine the crystal structure contained in the product and the level of Hydroxyapatite in the product. The best research results in this study at a temperature of 900ºC at a concentration of 1.2M phosphoric acid with a Hydroxyapatite content of 100% with lattice parameters an (Aº)=b (Aº) = 9..422, c (Aº)=6.8835, and gamma = 120º. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/72 10.33005/ijeise.v3i02.72 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 2 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i02 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/72/58 Copyright (c) 2024 Ika Nawang Puspitawati, Aziz Hafizh Tauhid, Abdullah Tsani M.N.K, Lucky Indrati Utami, Kindriari Nurma Wahyusi https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/74 2024-05-14T04:57:54Z ijeise:ART driver

Corrosion Inhibition studies of poly (N-tertamylacrylamide -co- N-phenyl acrylamide) copolymers by EIS and PDP methods Kayalvizhy, E. Hidayah, Euis Nurul Pazhanisamy, P. copolymerization, corrosion inhibition, N-phenylacrylamide, EIS study Herein, we reported the synthesis and corrosion inhibition studies of poly (N-tert- amylacrylamide-co- N-phenyl acrylamide) copolymers. The copolymers are synthesized by free radical polymerization using NTA and NPAM monomers . The synthesized copolymers are subjected to corrosion inhibition behavior by EIS and PDP methods. Both the methods showed same results of 85.0 percentage of inhibition. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/74 10.33005/ijeise.v3i02.74 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 2 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i02 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/74/59 Copyright (c) 2024 E. Kayalvizhy, Euis Nurul Hidayah, P. Pazhanisamy https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/75 2024-05-14T04:57:54Z ijeise:ART driver

Poly (N-tert-amylacrylamide -co- Acrylamide/ Sodium acrylate) Fe3O4 Nanocomposite Hydrogels as polymer catalyst for the reduction of Methylene Blue Dye Pazhnaisamy, P. Hidayah, Euis Nurul Sulania, Indra Fe3O4 Nanocomposite Hydrogels were prepared by free radical polymerization using N-tert-amyl acrylamide , Acrylamide and Sodium acrylate monomers at 60OC. Fe3O4 NPs was intercalated via in situ method. The synthesized nanocomposite Hydrogels conformed by FT-IR spectroscopy.  Surface morphology of the nanocomposite hydrogels indicated the ferrate nanoparticles are intercalated uniformly throughout the polymer matrix. The XRD pattern of the hydrogel showed the presence of nanoparticles   in the matrix with certain crystallinity nature.  UV-visible absorption studies reveal the catalytic activity of Methylene Blue dye molecules in the aqueous medium by the Nanocomposite hydrogels. UPN Veteran Jatim 2024-05-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/75 10.33005/ijeise.v3i02.75 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 3 No. 2 (2022): IJEISE 2721-8775 10.33005/ijeise.v3i02 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/75/60 Copyright (c) 2024 P. Pazhnaisamy, Euis Nurul Hidayah, Indra Sulania https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/89 2023-09-20T08:15:18Z ijeise:ART driver

Time Effect on Aerobic Composting Method for Temperature and pH from Brem Waste Wahyusi, Kindriari Nurma Muashomah, Ummi Bella, Annisa Fauziyah, Nur Aini Compost, Brem waste, aerobic composting, effect of time, pH This research addressed to utilize brem waste to be compost with the addition of M-Bio activator using aerobic composting method. Brem waste was collected from brem industry, UD. Tongkat Mas, located in the Caruban, Madiun, East Java. The main material was brem waste (1 kg) with additional materials of eggshell flour (300 g) and M-Bio activator. Here, we considered every time and the pH was measured every time interval. This brem waste was included in organic waste. This organic waste had a high water content so it can easily decompose. The temperature of compost increased as addition of M-Bio activator. The best properties was shown by the compost III that met with the standards SNI 19-7030-2004. UPN Veteran Jatim 2023-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/89 10.33005/ijeise.v2i2.89 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 2 No. 2 (2021): IJEISE 2721-8775 10.33005/ijeise.v2i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/89/5 Copyright (c) 2023 Kindriari Nurma Wahyusi, Ummi Muashomah, Annisa Bella, Nur Aini Fauziyah https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/102 2024-01-31T12:59:20Z ijeise:ART

oai:ojs2.ijeise.upnjatim.ac.id:article/112 2023-11-28T00:35:10Z ijeise:ART driver

Characteristics Biobriquettes from Mushroom Baglog Waste Carbonization Production Puspitawati, Ika Nawang Wahyusi, Kindriari Nurma Santi, Sintha Soraya Suprihatin Saputro, Erwan Adi Karaman, Novel Biobriquettes, Carbonization, Mushroom Baglog Bio briquette is a briquette based on agricultural waste because it is deliberately made from biomass charcoal. The utilization of agricultural waste such as mushroom planting media to be processed as bio briquette requires a very cheap cost. Bio briquettes that are processed properly and correctly, will produce high-quality briquettes. The purpose of this study was to produce a biobriquette from baglog mushroom waste and to determine the characteristics of the biobriquette. The research material used consisted of 400 grams of mushroom baglog waste and 40 grams of starch as adhesive. The briquette dough is then printed cylindrical. The printed briquettes are then heated at 80°C for 5 hours to reduce the moisture content. The result of smoke test is the smoke will stop in 17 seconds with the color of the smoke is white. The Combustion of speed test, the results obtained are 0,0019 gram/second with an initial sample weight of 2, 4 grams and burning for 20 minutes 35 seconds with a final sample weight of 0,387 grams. The result of ash content is 0.16%. This result is in accordance with the SNI issued by our government. SNI of ash content is max 8 %. UPN Veteran Jatim 2023-10-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/112 10.33005/ijeise.v4i1.112 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 1 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/112/31 Copyright (c) 2023 Ika Nawang Puspitawati, Kindriari Nurma Wahyusi, Sintha Soraya Santi, Suprihatin, Erwan Adi Saputro, Novel Karaman https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/113 2023-11-28T00:35:10Z ijeise:ART driver

Application of Kansei Engineering to Capture Consumer Demand for Cooking Oil Product Packaging Sari, Komang Nickita Anityasari, Maria Sari, Ni Ketut Musthika, I Komang Tri cooking oil, extended producer responsibility, kansei engineering, plastic packaging. Plastic food packaging has become a part of human daily life. The management of plastic waste is a matter of concern due to its potential which is difficult to decompose. This condition causes all producers to have a responsibility not only during the manufacturing process but until the end of the life of their products. This expanded responsibility is called EPR (Extended Producer Responsibility). Therefore the resulting packaging design becomes a breakthrough in this matter. This research attempts to apply the Kansei Engineering method to capture customers' emotional needs from consumers in compiling plastic packaging design parameters. The research method in this paper uses the Kansei Engineering method, namely by collecting Kansei words from respondents at random, then the Kansei words are reduced. The reduced Kansei word will be synthesized to produce quality attributes that are able to meet the customer's emotional needs. The Kansei words obtained from the survey results are 55 words. Packaging quality attributes that have met the customer's emotional needs include protection, refillable, recyclable, biodegradable, food safety, additional function, attractiveness, conformity, ergonomic, user friendly, and content declaration (on the packaging label). UPN Veteran Jatim 2023-10-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/113 10.33005/ijeise.v4i1.113 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 1 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/113/34 Copyright (c) 2023 Komang Nickita Sari, Maria Anityasari, Ni Ketut Sari, I Komang Tri Musthika https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/114 2023-11-28T00:35:10Z ijeise:ART driver

Sustainability Assessment of Rural Water Supply System in Lamongan, Indonesia Nisa’, Syadzadhiya Qothrunada Zakiyayasin Novembrianto, Rizka Murti, Restu Hikmah Ayu Jawwad, Muhammad Abdus Salam water supply system, water quality, water quantity, water continuity The commitment to provide clean water and proper sanitation is one of the goals of the Sustainable Development Programs (SDGs). The government of each region needs to strive for clean water for the community. Efforts to provide clean water can be realized with the Water Supply System. Water Supply System sustainability indicators need to fulfill three aspects of quality, quantity, and continuity. The aim of this research was to assess the sustainability of the ‘Sugio’ Water Supply System in Lamongan Regency, which served three villages, namely Sugio, Lebakadi, and Sekarbagus. The aspect of water quality, seen from the results of the analysis of the quality of production water, met the quality standards for drinking water. The aspect of water quantity was calculated to meet water needs for the next 20 years. The calculation showed that the daily average debit requirement was 17 L/s and the daily maximum debit was 19 L/s, while the existing debit was 15 L/s. The aspect of water continuity was calculated by the ability to distribute water during an emergency. The calculation showed that the distribution of clean water when there was no source of electrical energy could only be carried out in a maximum of 1 hour, 13 minutes, and 48 seconds. The conclusion obtained was that the sustainability of the ‘Sugio’ Water Supply System from the perspective of water quantity and continuity needed to be improved. UPN Veteran Jatim 2023-10-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/114 10.33005/ijeise.v4i1.114 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 1 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/114/32 Copyright (c) 2023 Syadzadhiya Qothrunada Zakiyayasin Nisa’, Rizka Novembrianto, Restu Hikmah Ayu Murti, Muhammad Abdus Salam Jawwad https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/115 2023-11-28T00:35:10Z ijeise:ART driver

Optimization of Neutralize Crude Gypsum (NCG) Quality through Flash Dryer Utilization at Plant IIIA PT. Petrokimia Gresik Yunarwan, Rensa Arnas Larissa, Shanti Taufiqi, Rohmad Yogaswara, Rachmad Ramadhan flash dyer, gypsum, moisture, NCG Neutralized Crude Gypsum (NCG) is produced as by-product from phosphoric acid plant at Plant IIIA PT. Petrokimia Gresik. The aims of this study are finding main cause and solution from Neutralized Crude Gypsum (NCG) quality reduction at PT. Petrokimia Gresik Plant IIIA. This research is done by qualitative analysis in order to collect the data of gypsum quality every month. Gypsum characteristics is observed by some instrument analysis such as spectrophotometry UV-Vis, atomic absorption spectrometry (AAS), and gravimetry technique. NCG was taken at different point on gypsum disposal land and different times to analyze its quality change. NCG sample shows decreased quality having higher moisture content at September that does not comply the SNI 715:2016 about gypsum minimum quality. Flash dryer is designed in this study to reduce the water concentration inside the surface of gypsum particle. Flash dryer design can lower the H2O content based on material balance analysis at finishing sector Plant IIIA unit. UPN Veteran Jatim 2023-10-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/115 10.33005/ijeise.v4i1.115 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 1 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/115/33 Copyright (c) 2023 Rensa Arnas Yunarwan, Shanti Larissa, Rohmad Taufiqi, Rachmad Ramadhan Yogaswara https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/116 2023-11-28T00:35:10Z ijeise:ART driver

Review: Biogas Fermentation Process Aunillah, Mohammad Arriza Novan Tahta Cezarridfalah, Bintang Bayu Saputro, Erwan Adi Febrianto, Noor Ariefandie fermentation, biogas, domestic waste, optimum condition Biogas is a gas generated through anaerobic processes that involve the decomposition of organic materials. Various sources of methane can be utilized to produce biogas, including household waste, biodegradable waste, animal waste, or organic materials that can break down under anaerobic conditions. The objective of this study is to investigate how different conditions, such as time, pH levels, stirring duration, and the type and concentration of inoculum, influence biogas production, with the aim of identifying the optimal conditions for the biogas production process. This research focused on examining the factors that impact the biogas production process, which includes several stages like hydrolysis, acetogenesis, acidogenesis, and methanogenesis. The findings from prior experiments showed that the optimal biogas production was achieved using tofu liquid waste, resulting in a volume of 26,700 ml over a 36-day period. This was achieved by maintaining an operating temperature between 35-40°C and employing cow dung as the inoculum, along with a 36-liter digester. UPN Veteran Jatim 2023-10-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/116 10.33005/ijeise.v4i1.116 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 1 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/116/30 Copyright (c) 2023 Mohammad Arriza Novan Tahta Aunillah, Bintang Bayu Cezarridfalah, Erwan Adi Saputro, Noor Ariefandie Febrianto https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/117 2023-11-28T14:52:30Z ijeise:ART driver

Control of Corrosion Rate of Metal Alloys: SS 304 And SS 201 Using Phosphate Inhibitor in Nacl 3.5% Sunarti, AR Yelvia Utami, Isni Fariadi, A. Fani Dwiyulianty Pinakesti, Arfinka Astuti, Dwi Hery Sani Corrosion Metals Alloys SS 304 SS 201 Phospate Inhibitor Corrosion is metal damage caused by electrochemical reactions with its environment. This environment can be water, air, gas, acid solution, salt solution, and others. Metals are highly active in producing an oxide layer on the metal surface under the influence of an aerobic environment. Metal corrosion is a process where the action of the surrounding media damages metal materials by the introduction of corrosion ions. This study aims to determine the best conditions for phosphate in controlling the rate of corrosion and Knowing the inhibition of phosphate on controlling the rate of corrosion. The materials used were stainless steel 201, stainless steel 304, and phosphate as an inhibitor. Meanwhile the solution NaCl 3.5% as a corrosive media environment and distilled water. Based on this research, the best phosphate concentration in reducing the corrosion rate of stainless steel 201 and 304 is 100 ppm with a reduction in the corrosion rate of stainless steel 201 of 0.022312 mpy with an inhibition percentage of 89.68%, and a reduction in the corrosion rate of stainless steel 304 by 0.045694 mpy with the percentage of inhibition is 94.027%. The corrosion rate of 304 stainless steel is lower than that of 201 stainless steel caused by differences in the Cr element composition of each metal. Stainless steel 304 contains 18.24% Cr while stainless steel 201 contains 13.00% Cr. The lower the Cr content in stainless steel, the stainless steel will be more susceptible to corrosion. UPN Veteran Jatim 2023-11-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/117 10.33005/ijeise.v4i2.117 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 2 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/117/38 Copyright (c) 2023 AR Yelvia Sunarti, Isni Utami, A. Fani Dwiyulianty Fariadi, Arfinka Pinakesti, Dwi Hery Astuti, Sani https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/119 2023-11-28T14:52:30Z ijeise:ART driver

Mass Transfer Coefficient Study of Cherry (Muntingia calabura L.) Leaves Alkaloids Extraction Using Ethanol Wahyusi, Kindriari Nurma Nurmawati, Ardika Zaen, Yuliyatin Alkaloids Cherry leaves Ethanol Extraction Cherry (Muntingia calabura L.) leaves have been acknowledged for their potential as a rich source of various components including alkaloid, flavonoid, tannin, saponin, triterpenes, and polyphenol. Alkaloids play diverse roles in medical science. Isolated alkaloids from plants are already widely used in traditional medicine.  Obtaining alkaloids from the leaves required an extraction process using organic solvent. This study aimed to evaluate the mass transfer coefficient for the extraction of alkaloids from cherry leaves using ethanol as a solvent. Dried cherry leaves were contacted with 96% ethanol at different temperatures and contact times. The extraction temperature ranged from 60, 65, 70, 75, and 80oC while the contact time varied from 30, 60, 90, 120, and 150 minutes. The extraction process was conducted with a mixing speed of 440 rpm. With the increasing contact time and extraction temperature, there was a corresponding increase in alkaloid concentrations. The optimal extraction conditions were achieved at 75oC with an extraction time of 150 minutes, resulting in an alkaloid content of 0.6486 gr/ml. The mass transfer coefficient under these extraction process conditions was 1.7923 hour-1. These data are crucial for the design and scale-up of extractors to achieve optimal results. UPN Veteran Jatim 2023-11-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/119 10.33005/ijeise.v4i2.119 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 2 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/119/39 Copyright (c) 2023 Kindriari Nurma Wahyusi, Ardika Nurmawati, Yuliyatin Zaen https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/120 2023-11-28T14:52:30Z ijeise:ART driver

Potency of Mangrove Leaves (Rhizophora mucronata) Containing Bioactive Compounds as Source of Antioxidant: A Review Rahmawati Sanjaya, Yushinta Aristina Pratiwi, Yunita Satya Hendrawan, Elistiya Putri Nuraini Salsabila, Zhafa Nesya Amalia, Tania bioactive compounds leaves mangrove Rhizophora mucronata Bioactive compounds derived from plants are gaining attention worldwide because they have beneficial effects on humans. Rhizophora mucronata is a species of mangrove plant that has slightly dark leaves and glossy green on the top of the leaves and pale green on the bottom and acts as a natural antioxidant which has traditionally been used as a food ingredient and traditional medicine. Therefore, this article was written to review the bioactive compounds in Rhizophora mucronata leaves, antioxidant levels and the benefits of antioxidants in food and health products. This article summarizes relevant literature regarding R. mucronata which was tested using Phytochemical screening, FTIR and DPPH (1,1-diphenyl-2-picrylhydrazyl) methods. Phytochemical analysis revealed the presence of alkaloids, flavonoids, steroids, phenolics, tannins and saponins. Based on the FTIR test, R. mucronata leaf extract showed the presence of –OH, C-H (aromatic), C=C (aromatic), and C-O groups. The antioxidant capacity expressed in IC50 (mg/mL) shows that R. mucronata has the potential to be used as a source of natural antioxidants. Antioxidants can play a role in improving the sensory quality of a food product and as a natural bactericidal so that it can be used to maintain aquatic biota and food preservatives. In addition, antioxidants contained in mangroves can prevent aging, wrinkles, cancer, obesity, and diabetes mellitus. UPN Veteran Jatim 2023-11-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/120 10.33005/ijeise.v4i2.120 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 2 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/120/35 Copyright (c) 2023 Rahmawati, Yushinta Aristina Sanjaya, Yunita Satya Pratiwi, Elistiya Putri Nuraini Hendrawan, Zhafa Nesya Salsabila, Tania Amalia https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/121 2023-11-28T14:52:30Z ijeise:ART driver

Designing the Distribution Route for 40 Kg Cement Using Ant Colony Optimization Algorithm at PT. SBI Tuban Rusindiyanto Winursito, Yekti Condro Nugraha, Isna Syaifullah, Hafid Dicky, Mochammad Ant Colony Algorithm Travelling Salesman Problem Distribution is a process of distributing goods or services needed from producers or service producers to consumers and to users, wherever and whenever needed. Problems that often occur in the distribution process that are often encountered are constraints on ineffective routes and inadequate fleet carrying capacity, especially in the Tuban and surrounding areas. This study aims to optimize the distribution route using the Ant Colony Optimization algorithm. This method is used to determine the shortest route that can be taken with the help of ants, achieving optimal results in reducing the distance. The conclusion from this research is that the route, namely the total distance traveled for the ant colony algorithm is 163.2 km for one trip. The fleet required for each shipment is 2 trucks with each truck carrying 8 tons and 7.6 tons. And each truck covers a round trip distance of 151.7 km and 61.7 km. UPN Veteran Jatim 2023-11-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/121 10.33005/ijeise.v4i2.121 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 2 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/121/36 Copyright (c) 2023 Rusindiyanto, Yekti Condro Winursito, Isna Nugraha, Hafid Syaifullah, Mochammad Dicky https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/122 2023-11-28T14:52:30Z ijeise:ART driver

Design of Web-Based Laboratory E-Learning Information System (Case Study in UPN "Veteran" Jawa Timur Industrial Engineering’s Laboratory) Donoriyanto, Dwi Sukma Nugraha, Isna Adityawarman, Ario E-Learning Website PHP SQL Information System This time, the development of technology has increase rapidly, one example of technology application in education is development the concept of e-learning. However, the Industrial Management and Statistic Laboratory (IMSL) located at UPN “Veteran” Jawa Timur in the Industrial Engineering Department does not have the supporting facilities for practicum learning such as E-Learning. In other words, the learning process between laboratory assistants and practitioners is very limited, and causes a lack of intensity in interaction between laboratory assistants and practitioners. In this research, a web-based E-Learning information system will be produced to provide easiness in practicum learning for people who related to the laboratory, and can be accessed anytime and anywhere. The research method for collecting required data is by observation and interviews. This e-Learning is designed with ​​PHP, HTML, and SQL programming languages. And the supporting software that are Google Chrome, XAMPP, VSCode, and FileZilla. Based on the test results, it is concluded that the web-based IMSL E-Learning information system has provided easy learning to the practitioners and people who involved in the laboratory. While laboratory assistants can send announcements about practicum information and practitioners can do the revisions or acc reports to certain laboratory assistants systematically and online. UPN Veteran Jatim 2023-11-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/122 10.33005/ijeise.v4i2.122 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 4 No. 2 (2023): IJEISE 2721-8775 10.33005/ijeise.v4i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/122/37 Copyright (c) 2023 Dwi Sukma Donoriyanto, Isna Nugraha, Ario Adityawarman https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/123 2024-06-11T02:22:10Z ijeise:ART driver

Evaluation of Boiler Feed Water Quality in Tofu Industry UD. FIT in Bocek Village Prihardani, Fitri Fariana, Nida Yogaswara, Rachmad Ramadhan Islamiyah, Syuaibatul boiler feed water fire tube boiler tofu industry water quality The UD FIT industry, situated in Bocek Village, Karangploso District, operates as a tofu factory employing modern equipment, including a fire tube boiler. The quality of feed water utilized in the boiler is essential for optimizing its efficiency. This study aimed to analyze the boiler feed water sourced from household wells at UD FIT's tofu factory, using various indicators such as turbidity, iron content, total dissolved solids (TDS), hardness, and pH levels. The test results revealed a temperature of 26°C, TDS of 253 mg/L, turbidity of 4.74 NTU, iron content of 1.123 mg/L, hardness of 180.5 mg/L, and pH of 7.89, with no detectable odor, color, or taste. Based on these findings, it is concluded that the boiler feed water utilized by UD FIT generally meet the quality standards, except for the pH parameter, which is not in accordance with the standard. UPN Veteran Jatim 2024-06-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/123 10.33005/ijeise.v5i1.123 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 1 (2024): IJEISE; 1-5 2721-8775 10.33005/ijeise.v5i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/123/62 Copyright (c) 2024 Fitri Prihardani, Nida Fariana, Rachmad Ramadhan Yogaswara, Syuaibatul Islamiyah https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/125 2024-06-11T02:22:10Z ijeise:ART driver

The Influence of the Green Product Milo UHT Drink on Consumer Purchase Interest Using the Simple Regression Analysis Method Nugraha, Isna Ramadhan , Gilang ANOVA, Green Product Milo UHT Multiple Regression Purchase Intention This research aims to evaluate the influence of Green Product Milo packaging on consumer buying interest. A quantitative descriptive research method was used by applying path analysis through a questionnaire distributed to 120 Milo consumer respondents. The research results show that Green Product adoption has a positive effect on repurchase intention. The implication is that companies need to maintain Green Products by continuing to innovate quality and environmentally friendly products and increasing promotions through potential media such as Instagram. Statistical analysis shows that there is a significant relationship between the level of product completeness and consumer attractiveness (p < 0.05). Although the correlation between the level of environmentally friendly products and purchase intention is relatively weak (correlation 0.411), the regression model shows a positive influence. From the results of ANOVA calculations, this regression can be used to predict purchasing interest in environmentally friendly products. It can be concluded that Green Products have a significant influence on consumer buying interest by contributing 16.9% to the variability in buying interest. This research provides an important contribution to companies in making strategic decisions related to product development and marketing. UPN Veteran Jatim 2024-06-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/125 10.33005/ijeise.v5i1.125 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 1 (2024): IJEISE; 6-12 2721-8775 10.33005/ijeise.v5i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/125/63 Copyright (c) 2024 Isna Nugraha, Gilang Ramadhan https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/126 2024-06-11T02:22:10Z ijeise:ART driver

Analysis of The Queue System in Self-Service Using The "ABC Supermarket" Queue Method Islami, Mega Cattleya P.A Winursito, Yekti Condro Saputro, Erwan Adi Noviani, Siti Alya Queue System Optimization FCFS payment cashier. A queuing system is a mathematical model used to analyze the phenomenon where entities wait to receive services from one or more service providers. In this system, arriving entities will queue if the service is not immediately available and will be served according to a specific order or priority when the service becomes available. ABC Supermarket is a store that is always busy with customers. Besides having low prices, ABC Supermarket also provides daily necessities. The purpose of this research is to determine whether the cashier queue system implemented at ABC Supermarket is effective or not. This research uses the queue system method. This research concludes that the queue system at ABC Supermarket with 6 cashiers has an average ρ value percentage of 41.67%, which falls into the ineffective category. The most effective number of cashiers is 3, with an average r value percentage of 83.33%, which falls into the effective category. The purpose of queuing system analysis is to optimize the performance of the queuing process by determining the optimal number of service providers required. UPN Veteran Jatim 2024-06-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/126 10.33005/ijeise.v5i1.126 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 1 (2024): IJEISE; 23-27 2721-8775 10.33005/ijeise.v5i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/126/65 Copyright (c) 2024 Mega Cattleya P.A Islami, Yekti Condro Winursito, Erwan Adi Saputro, Siti Alya Noviani https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/127 2024-06-11T02:22:10Z ijeise:ART driver

Analysis of Sulfur Dioxide (SO2) Exhaust Gas Emission Distribution Patterns from Airport’s Incinerators in East Java Adhi Pamungkas, Kresna Setyawan Restu Hikmah Ayu Murti Muhammad Abdus Salam Jawwad air dispersion airport modeling aermod view emissions incinerator The airport in this study is one of the airports in East Java that uses an incinerator to process its waste. Emissions generated by the incinerator will disperse in the area surrounding one of the airports in East Java. With the increasing interest of the public in air travel, activity at the airport also increases. This increase also impacts the amount of waste processed by the incinerator and the emissions produced, including Sulfur Dioxide (SO2). The aim of this study is to analyze the dispersion of air pollutants using Aermod View modeling software with SO2 parameters from environmental document data of the airport from January to June and from July to December generated by the incinerator stack. The model produces isopleths representing the dispersion of SO2 emissions. The results of the SO2 model still meet ambient air quality standards, as indicated in Appendix VII of Government Regulation Number 22 of 2021. UPN Veteran Jatim 2024-06-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/127 10.33005/ijeise.v5i1.127 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 1 (2024): IJEISE; 28-33 2721-8775 10.33005/ijeise.v5i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/127/66 Copyright (c) 2024 Kresna Setyawan Adhi Pamungkas, Restu Hikmah Ayu Murti, Muhammad Abdus Salam Jawwad https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/128 2024-06-11T02:22:10Z ijeise:ART driver

METABOLOMIC TECHNIQUE IN GREEN TEA RESEARCH: A REVIEW Kurnianto, Muhammad Alfid Rini, Dina Mustika green tea metabolomic Camelia sinensis bioactivity bioactive compounds Tea, consumed by two-thirds of the global population, had a production of 5.68 million tons in 2017. The cultivation and processing of tea are crucial variables that have a substantial impact on the final product. As a result, many types of tea, such as black, oolong, and green, are produced, each with its own unique flavors and health advantages. Metabolomic techniques, which employ advanced analytical methods, are employed to characterize chemical composition of tea, thereby enabling the assessment of its quality, origin, and bioactivity. This review focused on the application of these techniques to the green tea research. Analytical methods such as UPLC-MS and 1H NMR, when employed in conjunction with multivariate analysis, have proven effective in correlating green tea quality with its chemical constituents, identifying key metabolites such as EGCG, ECG, and caffeine. These metabolomic techniques permit rapid and accurate assessments, enabling the differentiation between high- and low-quality green tea and enhancing the comprehension of its chemical composition and sensory attributes. In addition, a metabolomic approach was employed, utilizing HPLC-TOF-MS, to differentiate between various types of green tea based on their bioactivities. These methods have the capacity to reveal significant variations in metabolite profiles and bioactivities. The application of multivariate analysis enabled the identification of specific bioactive cultivars, thereby demonstrating the efficacy of the technique in evaluating the health-promoting effects of different tea samples. Thus, metabolomic methods represent an optimal approach for a comprehensive and expeditious investigation of the research related to green tea. UPN Veteran Jatim 2024-06-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/128 10.33005/ijeise.v5i1.128 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 1 (2024): IJEISE; 13-22 2721-8775 10.33005/ijeise.v5i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/128/64 Copyright (c) 2024 Muhammad Alfid Kurnianto, Dina Mustika Rini https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/130 2024-11-30T08:34:23Z ijeise:ART driver

The Effect of Total Quality Management on Service Quality, Price, and Customer Satisfaction at Kita-Kita Tour and Travel Nugraha, Isna Ramadhan, Gilang Customer Satisfaction Effect of TQM on Price Service Quality TQM Travel This study aims to analyze the effect of Total Quality Management (TQM) implementation on service quality and price and its impact on customer satisfaction at Kita-Kita Tour and Travel. This study uses a quantitative method with a casual associative approach to measure service quality variables (X1), price (X2), and customer satisfaction (Y). Data was collected through questionnaires distributed to consumers who have used Kita-Kita Tour and Travel services, and was analyzed using SPSS software. Data that meets the validity, reliability, and classical assumption tests are then processed to produce a linear regression equation. The results of the analysis show that service quality and price partially and simultaneously have a positive and significant effect on customer satisfaction, so the hypothesis is accepted. The reliability test resulted in a Cronbach's Alpha value of 0.864, indicating that the data obtained is reliable. Based on this research, it shows that the implementation of TQM has a positive impact on service quality and price, which in turn increases customer satisfaction. UPN Veteran Jatim 2024-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/130 10.33005/ijeise.v5i2.130 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 2 (2024): IJEISE; 1 - 6 2721-8775 10.33005/ijeise.v5i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/130/67 Copyright (c) 2024 Isna Nugraha, Gilang Ramadhan https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/131 2024-11-30T08:34:23Z ijeise:ART driver

Implementation of Validity and Reliability Tests on Service Satisfaction Levels of the Spotify Application Using SPSS Software Resmi Hayati, Kinanti Setiyoningsih, Titi Izzah, Navisatul Islamey, Tarisa A Yuanda, Tiara A Reliability Spotify SPSS Validity Spotify is a legal digital music application widely used for online streaming, especially popular among students. This popularity provides a solid foundation for conducting a case study on user satisfaction levels with Spotify in Indonesia. The research employs a questionnaire to collect data, which is subsequently tested for validity and reliability using SPSS software. The results indicate that several variables, such as improved user experience, user-friendly interface, useful features, and fast performance, have high validity values, with significance levels below 0.05. These variables exceed the r-table, with values ranging from 0.5 to 0.904. In cases where any variable is found invalid, retesting will be conducted to ensure the data is valid. Reliability testing produced a Cronbach's alpha coefficient of 0.772, demonstrating that the data used in this study is reliable, as it exceeds the acceptable threshold of 0.6. Therefore, this research provides valuable insights into user satisfaction levels regarding Spotify's services in Indonesia, making it a trustworthy resource for understanding user experiences and areas for improvement within the application. Overall, the findings contribute to a deeper understanding of user preferences and satisfaction in the digital music streaming landscape. UPN Veteran Jatim 2024-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/131 10.33005/ijeise.v5i2.131 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 2 (2024): IJEISE; 7 - 14 2721-8775 10.33005/ijeise.v5i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/131/68 Copyright (c) 2024 Kinanti Resmi Hayati, Titi Setiyoningsih, Navisatul Izzah, Tarisa A Islamey; Tiara A Yuanda https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/133 2024-11-30T08:34:23Z ijeise:ART driver

Effect of Fosroc Cebex-100 and Fly Ash Stabilization on the Microstructural Properties of Soft Soil Farichah, Himatul Firmansyah, Yerry Kahaditu Puspitasari, Nia Dwi Damayanti, Apta Kania Fosroc-Cebex 100 fly ash SEM-EDX soft soil microstructure This study investigates the microstructural effects of stabilizing soft soil using fly ash and Fosroc Cebex-100. The soft soil used in this study was collected from the construction site of the Northern Ring Road (JLU) Section 1 in Lamongan regency. Firstly, a series of laboratory soil test was performed to obtain the index properties of the soil sample including unit weight, specific gravity, Atterberg’s limits, optimum moisture content, and maximum dry unit weight. The soil was then treated with three variations of fly ash (20%, 25%, and 30%), while the Fosroc Cebex-100 dosage was held constant at 0.45% of the fly ash weight. A CBR test indicated that a 20% fly ash and Fosroc Cebex-100 mixture achieved the highest CBR value. Consequently, this optimal mix was selected for SEM-EDX (Scanning Electron Microscopy - Energy-Dispersive X-ray Spectroscopy) analysis to further examine microstructural characteristics. Additional fly ash and Fosroc Cebex-100 to the soft soil will influence the microstructural properties of the soil. SEM analysis show that addition of fly ash and Fosroc Cebex-100 results in significant changes in the soil matrix, including increased particle bonding, reduced porosity, and a denser overall structure. Moreover, the addition of fly ash and Fosroc Cebex-100 contribute to the presence of iron (Fe) in the treated soil. UPN Veteran Jatim 2024-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/133 10.33005/ijeise.v5i2.133 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 2 (2024): IJEISE; 15-20 2721-8775 10.33005/ijeise.v5i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/133/69 Copyright (c) 2024 Himatul Farichah, Yerry Kahaditu Firmansyah, Nia Dwi Puspitasari, Apta Kania Damayanti https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/134 2024-11-30T08:34:23Z ijeise:ART driver

Risk Identification and Management Analysis at Company X Using FMEA and EPQ Methods Islami, Mega Cattleya P. A Rahadian, Yanuar Rafi Rahadian Bisri, Hasan Winursito, Yekti Condro Cost Optimization EPQ FMEA Overproduction Risk Management This study aims to identify and manage risks in Company X’s instant noodle production process using Failure Mode and Effects Analysis (FMEA) and Economic Production Quantity (EPQ) methods. FMEA is used to analyze potential failure modes, while EPQ optimizes production quantities to minimize storage and overproduction costs. The research identifies key risks such as overproduction, machinery failures, and packaging defects. Data collected includes production volumes, raw material usage, and defect rates. FMEA reveals that overproduction is the primary risk, leading to high storage costs. EPQ calculations are performed to determine the optimal monthly production for three instant noodle variants, resulting in significant cost savings. The study concludes that implementing EPQ alongside FMEA minimizes risks and reduces inventory management costs, highlighting the importance of systematic risk management in production optimization. This approach helps Company X enhance efficiency while cutting purchasing and costs expenses by Rp. 3,900,000.00 per month. UPN Veteran Jatim 2024-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/134 10.33005/ijeise.v5i2.134 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 2 (2024): IJEISE; 30 - 35 2721-8775 10.33005/ijeise.v5i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/134/71 Copyright (c) 2024 Mega Cattleya P. A Islami, Yanuar Rafi Rahadian Rahadian, Hasan Bisri, Yekti Condro Winursito https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/135 2024-11-30T08:34:23Z ijeise:ART driver

Mini-Review on Renewable Production of Green p-Xylene Muchammad, Raka Selaksa Charisma Saputro, Erwan Adi Rohmah, Aisyah Alifatul Zahidah p-xylene bio-based production green chemistry The sustainable and renewable production of p-xylene (PX), a crucial component for polyethylene terephthalate (PET), is increasingly important as an alternative to fossil-based processes. This review examines biomass-derived routes for PX synthesis, emphasizing the use of bio-px production pathways to feasible for commercialization. While bio-PX production offers reduced greenhouse gas emissions, challenges remain in cost, catalyst stability, and energy requirements. Recent innovations in catalyst regeneration and hierarchical structures enhance stability and minimize coke formation. Life-cycle assessments confirm bio-PX’s environmental advantages, suggesting that further research into biomass sources and catalyst efficiency will advance bio-based PX production toward commercial viability in a sustainable bioeconomy. UPN Veteran Jatim 2024-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/135 10.33005/ijeise.v5i2.135 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 2 (2024): IJEISE; 21-29 2721-8775 10.33005/ijeise.v5i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/135/70 Copyright (c) 2024 Raka Selaksa Charisma Muchammad, Erwan Adi Saputro, Aisyah Alifatul Zahidah Rohmah https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/136 2024-11-30T08:34:23Z ijeise:ART driver

Review Paper on the Level of Road Surface Damage in Mataram City Fatikasari, Aulia Dewi Aryaseta, Bagas Alfiansyah, Achmad Dzulfiqar PCI Method Bina Marga Method Pavement Damage Mataram City In Mataram City, the capital of West Nusa Tenggara Province, many road sections have deteriorated, reducing road comfort, safety, and mobility efficiency. Typical forms of road damage, such as cracks, potholes, deformation, and surface wear, demand regular maintenance and repairs to extend road service life. This situation underscores the need for a thorough mapping of road pavement damage to provide a comprehensive overview of the road network’s condition and to support effective maintenance planning. The mapping of pavement damage in Mataram City is also expected to inform more effective decision-making in road management. This study aims to review previous research on pavement damage mapping and apply the findings to road sections in Mataram City. This empirical, data-driven approach is anticipated to provide a thorough perspective on pavement conditions and serve as a foundation for the local government’s efforts to create more effective and efficient road maintenance policies. This study employs a systematic literature review approach to analyze and synthesize existing research regarding pavement damage in road sections using the PCI and Binamarga Methods on Mataram City roads. This study is classified as qualitative research, focused on extracting and synthesizing information from academic papers. Based on the research results from several journal reviews, in the city of Mataram,, several roads still experience visual damage to the pavement surface, including cracking, depression, patching and utility cut patching, and potholes. In addition, the results show that several roads experience fair-level damage based on the PCI method, and some have less than 50% damage to the road surface based on the Binamarga method UPN Veteran Jatim 2024-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/136 10.33005/ijeise.v5i2.136 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 2 (2024): IJEISE; 36 - 41 2721-8775 10.33005/ijeise.v5i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/136/72 Copyright (c) 2024 Aulia Dewi Fatikasari, Bagas Aryaseta, Achmad Dzulfiqar Alfiansyah https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/137 2024-11-30T08:34:23Z ijeise:ART driver

Optimization of Nano-Hydroxyapatite Production from Limestone with Effect of Gelatin Concentration and pH in Sol-Gel Synthesis S, Sutiyono Edahwati, Luluk Wahyudi, Mohammad Rafli Alif Rahmah, Nazila Alfi Nanohydroxyapatite gelatin concentration pH Sol gel limestone Nano hydroxyapatite is one of the biomaterials that has proven to be a very potential material due to its ability to bind directly with bone tissue. Limestone with a calcium carbonate content of 99.87% was used as a calcium source for the economical and sustainable synthesis of hydroxyapatite. The sol-gel method was chosen for the in situ gelatin synthesis process due to its ability to produce nanoparticles with high homogeneity. The particle size of nanohydroxyapatite can increase the surface area to volume ratio thus affecting the interaction with surrounding cells and tissues. Gelatin was added in various concentrations of 10%, 20%, and 30% as an innovative cell growth support modifier. The synthesis was also carried out at pH 9, 10, and 11 to evaluate its effect on hydroxyapatite formation. Optimal synthesis conditions were obtained at 30% gelatin concentration and pH 10, which resulted in the highest yield of 93.95%. Product characterization included Fourier Transform Infra-Red analysis, which showed the presence of typical hydroxyapatite functional groups (PO₄³-, OH-) and carbonate groups (CO₃²-). Scanning Electron Microscopy characterization showed nano-sized particles in the range of 443-578 nm with a granular structure. Porosity was found to be 72.52% making it ideal for cancellous bone tissue engineering applications. UPN Veteran Jatim 2024-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/137 10.33005/ijeise.v5i2.137 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 5 No. 2 (2024): IJEISE; 42-49 2721-8775 10.33005/ijeise.v5i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/137/73 Copyright (c) 2024 Sutiyono S, Luluk Edahwati, Mohammad Rafli Alif Wahyudi, Nazila Alfi Rahmah https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/140 2025-06-02T03:17:28Z ijeise:ART driver

Feasibility Study for Investment in VSPP Solar Power Plant in Thailand Using GIS and Financial Ratanasuwan, Rachata Paoprasert, Naraphorn Yousuk, Ramidayu Solar Farm Project Feasibility Site Selection Renewable Energy GIS Project Financial Modelling The study aims to evaluate the financial feasibility and land suitability for investment in VSPP solar plant in Thailand using Geographic Information System (GIS) and financial modeling techniques. The study analyze key parameters, including photovoltaic power output (PVOUT), land price, and distance from existing infrastructure. The methodology comprises GIS-based spatial analysis and financial performance assessment using indicators consisting of the Net Present Value (NPV), the Project Internal Rate of Return (PIRR), the Equity Internal Rate of Return (EIRR), and the simple payback period (SPB) to identify area and location for investment in VSPP solar power plant. The study areas were categorized into three groups based on the values of PVOUT - the 10% lowest PVOUT (Group 1), middle range PVOUT (45%-55%) (Group 2), and 10% highest PVOUT (Group 3). The results indicated that locations with the highest 10% PVOUT (Group 3) demonstrated the best financial performance, with an NPV of approximately 15 million THB, PIRR of 9.75%, EIRR of 11.50%, and a SPB of 9.25 years. Conversely, locations with the lowest 10% PVOUT (Group 1) were financially infeasible. UPN Veteran Jatim 2025-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/140 10.33005/ijeise.v6i1.140 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 1 (2025): IJEISE; 45-54 2721-8775 10.33005/ijeise.v6i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/140/82 Copyright (c) 2025 Rachata Ratanasuwan, Naraphorn Paoprasert, Ramidayu Yousuk https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/141 2025-11-22T09:01:39Z ijeise:ART driver

Degradation Of Congo Red Based On Natural Coagulant (Moringa Oleifera) Ramadani, Tarikh Azis Ramadhani, Dhiya’ Arnada Fatmawati, Meilinda Eka Mayangsari, Novi Eka Astuti, Ulvi Pri coagulation-flocculation congo red moringa oleifera natural coagulant The release of dyes into the environment can have deleterious effects. therefore, their handling must be done in a conscientious manner. One method that can be employed is coagulation-flocculation. The employment of natural coagulants has been demonstrated to mitigate the deleterious effects of polluting compounds on the ecosystem. Moringa oleifera, a plant native to tropical regions, including Indonesia, is a natural source of coagulants. Moringa oleifera plants are extracted using sodium chloride to isolate protein active ingredients. The utilization of a natural coagulant derived from moringa oleifera was implemented with the objective of ameliorating the deleterious effects of congo red. The effectiveness of the natural coagulant was evaluated based on the effect of initial concentration and coagulant dosage. The initial concentration and dose of coagulant exhibited a direct correlation with the efficiency of reducing congo red. An increase in the initial concentration resulted in a concomitant decrease in efficiency, while an increase in the coagulant dose demonstrated a corresponding increase in efficiency. The highest removal efficiency value was obtained when the coagulant dose was 100 ppm and the initial concentration was also 100 ppm. The consequence of this condition was a 99.46% reduction in efficiency of the congo red. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/141 10.33005/ijeise.v6i2.141 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 55-60 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/141/83 Copyright (c) 2025 Tarikh Azis Ramadani, Dhiya’ Arnada Ramadhani, Meilinda Eka Fatmawati, Novi Eka Mayangsari, Ulvi Pri Astuti https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/142 2025-11-22T09:01:39Z ijeise:ART driver

Comparative Analysis of Rrs486 and Rrs551 Wavelength Effectiveness from SNPP_VIIRS Satellite Imagery for Chlorophyll-a Mapping in Madura Strait, East Java Apriliana, Diyah Ayu Yuliano, Hendrikus Wibisana, Hendrata Chlorophyll-a mapping SNPPVIIRS remote sensing reflectance Madura Strait This study assesses the comparative performance of two remote sensing reflectance (Rrs) wavelengths, Rrs486 and Rrs551, derived from Suomi NPP VIIRS imagery, for estimating chlorophyll-a (chl-a) concentration in the Madura Strait, East Java, Indonesia. SNPP-VIIRS data from January 2025 and in-situ chl-a measurements from 25 sampling stations were analyzed to evaluate statistical relationships between satellite-derived Rrs and field observations. Correlation results show that Rrs486 has a stronger negative relationship with chl-a (r = –0.92) than Rrs551 (r = –0.83). Empirical algorithms developed for each wavelength indicate superior performance of the Rrs486-based model, yielding R² = 0.84, RMSE = 0.0021 mg/m³, and MAPE = 6.8%. In comparison, the Rrs551-based model produced lower accuracy with R² = 0.69, RMSE = 0.0037 mg/m³, and MAPE = 11.2%. A reflectance ratio algorithm (Rrs486/Rrs551) also demonstrated strong predictive potential (R² = 0.88). Spatial mapping using the optimal Rrs486 algorithm revealed higher chl-a concentrations near coastal zones and lower values in offshore waters. Overall, the findings confirm that Rrs486 provides more reliable chl-a estimations due to its spectral proximity to chlorophyll-a absorption features, supporting improved satellite-based monitoring in tropical coastal environments. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/142 10.33005/ijeise.v6i2.142 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 127-134 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/142/93 Copyright (c) 2025 Diyah Ayu Apriliana, Hendrikus Yuliano, Hendrata Wibisana https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/143 2025-06-02T03:17:28Z ijeise:ART driver

Synthesis of Magnetic Composites of Chitosan-Fly Ash-Fe3O4 Nanoparticle to Improve Congo Red Dye Adsorption Mayangsari, Novi Eka Dira Pratiwi, Dewi One Ashifa, Naura Aqillafasha Ramadani, Tarikh Azis Novitrie, Nora Amelia Nindyapuspa, Ayu Cahyono, Luqman chitosan composites magnetic fly ash cong Chitosan, an environmentally friendly adsorbent, is derived from the deacetylation of crab shell chitin. In this study, the chemical and physical properties of chitosan were enhanced through the direct compositing process of magnetic chitosan (Chi) with fly ash powder particles (FA). This research is of considerable importance in the development of environmentally friendly adsorbent materials for the treatment of wastewater contaminated with synthetic dyes, particularly azo dyes such as congo red. The utilization of crab shell waste as a source of chitosan, in conjunction with fly ash and Fe₃O₄ to form Chi-FA-Fe₃O₄ magnetic composites, has been demonstrated to exhibit considerable promise in enhancing adsorption efficiency. The magnetic composite of Chi-FA-Fe₃O₄ was characterized by XRD and SEM. The present study investigated the effect of adsorption process parameters on CR dye removal. The parameters that were investigated included contact time (30-150 minutes) and initial concentration of CR dye at an adsorbent dosage of 0.06 grams in 100 milliliters and a pH of 4. The maximum removal efficiency of the Chi-FA-Fe₃O₄ composite for CR dye was recorded as 99.82% at an initial concentration of 100 parts per million (ppm) CR dye for 150 minutes. Pursuant to the analysis of XRD, it has been confirmed that the compositing process was successfully executed, thereby yielding 2θ values indicative of Fe₃O₄ and FA. Additionally, an enhancement in the intensity of the Chi-FA-Fe₃O₄ composite was observed following the adsorption of CR dye. Concurrently, SEM analysis revealed that the Chi-FA-Fe₃O₄ composite and the Chi-FA-Fe₃O₄ composite exhibited an augmented intensity. UPN Veteran Jatim 2025-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/143 10.33005/ijeise.v6i1.143 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 1 (2025): IJEISE; 1-6 2721-8775 10.33005/ijeise.v6i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/143/74 Copyright (c) 2025 Novi Eka Mayangsari, Dewi One Dira Pratiwi, Naura Aqillafasha Ashifa, Tarikh Azis Ramadani, Nora Amelia Novitrie, Ayu Nindyapuspa, Luqman Cahyono https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/145 2025-06-02T03:17:28Z ijeise:ART driver

Life Cycle Assessment (LCA) Analysis Operational Vehicles Telecommunication Industry at PT. X in East Java Using OpenLCA Software and the ReCipe Midpoint H Method Darmawan, Agges Brian Jawwad, Muhammad Abdus Salam analyze environmental impact LCA OpenLCA ReCipe Midpoint (H) vehicle emissions The telecommunications industry heavily relies on operational vehicles to support network maintenance and customer service activities. This study aims to analyze the environmental impact resulting from the emissions of operational vehicles at PT. X, focusing on the East Java operational region. A Life Cycle Assessment (LCA) was conducted in accordance with ISO 14040, emphasizing the vehicle use phase. Primary data includes gasoline consumption and a total distance during the 2024 operational year. The analysis was performed using OpenLCA software with the Ecoinvent 3.3 database and the ReCipe Midpoint (H) method to quantify emissions and their associated environmental impacts. Results indicate that carbon dioxide (CO₂), carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOₓ), sulfur dioxide (SO₂), and particulate matter (PM10) are the primary contributors to environmental impact categories such as climate change, marine eutrophication, particulate matter formation, photochemical oxidant formation, and terrestrial acidification. The findings provide a quantitative basis for evaluating the environmental burden of operational fleets and highlight the importance of implementing efficient fleet management, eco-driving practices, and integrated emission reduction policies as part of corporate sustainability strategies. UPN Veteran Jatim 2025-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/145 10.33005/ijeise.v6i1.145 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 1 (2025): IJEISE; 7 - 14 2721-8775 10.33005/ijeise.v6i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/145/76 Copyright (c) 2025 Agges Brian Darmawan, Muhammad Abdus Salam Jawwad https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/146 2025-11-22T09:01:39Z ijeise:ART driver

Risk Analysis of Temporary Storage of B3 Waste at PT. PLN (Persero) Main Unit of Transmission in Eastern Java and Bali to the Environment with the Method Failure Mode and Effect Analysis (FMEA) Sari, Asti Meilinda Ayu Murti , Restu Hikmah Risk B3 Waste Temporary Storage FMEA Enviroment The type of waste that is classified as hazardous and toxic (B3) has characteristics that can cause environmental damage if its management is not carried out safely and according to procedures. The temporary storage facility for B3 waste owned by PT PLN (Persero) East Java and Bali Transmission Main Unit needs special attention so as not to create environmental risks around it. This study aims to identify and assess potential risks in the B3 waste storage area in the company through the FMEA (Failure Mode and Effect Analysis) method. The FMEA method is used to determine the possible failures that can occur in the B3 waste storage system and evaluate the impact it has on the environment. The results of the analysis showed that some failures, such as storage container leaks and ventilation system damage, have a high potential risk associated with soil and water pollution. This risk assessment provides recommendations for improving and strengthening B3 waste management, including improving monitoring and maintenance procedures of storage facilities, as well as improving training for staff involved in waste management. It is hoped that with the implementation of the results of this analysis, it can reduce the potential risks and environmental impacts caused by B3 waste management at PT. PLN (Persero) Main Unit of Transmission in East Java and Bali. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/146 10.33005/ijeise.v6i2.146 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 78-84 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/146/85 Copyright (c) 2025 Asti Meilinda Sari, Restu Hikmah Ayu Murti https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/147 2025-06-02T03:17:28Z ijeise:ART driver

Evaluation of Compliance of Domestic Waste Management to Environmental Quality Standard At the Implementation Unit of PT PLN (Persero) East Java and Bali Transmission Dinatha, Nabila Putri Murti, Restu Hikmah Ayu Management Domestic Waste Electricity Transmission Environmental Permit Documents Quality Standard Regulations PLN Environmental Quality Standard Domestic waste management in accordance with environmental quality standards is an important part of maintaining environmental quality and supporting the sustainability of company operations. This study aims to describe the level of compliance of domestic waste management at the Transmission Unit of PT PLN (Persero) East Java and Bali to applicable environmental quality standards, especially those regulated in Government Regulations and Regulations of the Minister of Environment. This study aims to evaluate the extent to which PLN's domestic waste management practices comply with the established environmental quality standards. This study uses a descriptive method with a qualitative approach, involving field observation and review of RKL-RPL documents of the Implementing Unit of PT. PLN East Java and Bali Transmission Main Unit. Data collection includes direct observation of the domestic waste processing process, and analysis of environmental monitoring reports. Parameters such as Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), pH, Total Suspended Solids (TSS), Lead (Pb) and oil and fat are analyzed to assess compliance with applicable environmental regulations. The results of the study indicate that most domestic waste management activities have complied with the established standards, although there are still some weaknesses in the aspects of recording, monitoring wastewater quality, and the availability of supporting facilities. These findings provide a basis for recommendations for improving internal supervision and improving the company's environmental management system. UPN Veteran Jatim 2025-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/147 10.33005/ijeise.v6i1.147 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 1 (2025): IJEISE; 22-29 2721-8775 10.33005/ijeise.v6i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/147/78 Copyright (c) 2025 Nabila Putri Dinatha, Restu Hikmah Ayu Murti https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/148 2025-11-22T09:01:39Z ijeise:ART driver

Biopolymer-based Edible Film for Food Packaging Application : Review Matovanni, Maudy Pratiwi Novia Jannah, Erisa Nur Utami, Aliyya Nisa Budi Maritza, Damara Ramadhani Pertiwi, Beta Cahaya Edible film Food packaging Polysaccharide Protein Composite Edible films serve as an effective barrier to prevent mass transfer between the product and its environment. This innovation facilitates the development of environmentally sustainable food packaging alternatives that promote the efficient use of natural resources. A variety of biopolymers are utilized in the formulation of edible films, primarily polysaccharides, proteins, and composite materials. Polysaccharides can be further categorized according to their origin, including plant, animal, marine, microbial, and industrial waste sources. Proteins are generally classified into plant- and animal-based categories. Composite films, which combine multiple biopolymer types, offer enhanced structural properties. The application of biopolymer-based edible films presents a promising strategy for mitigating commercial plastic waste accumulation. Nevertheless, the incorporation of additives—such as plasticizers, antioxidants, and antimicrobial agents—is essential to enhance film properties and ensure compliance with quality standards for food packaging application UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/148 10.33005/ijeise.v6i2.148 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 61-70 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/148/87 Copyright (c) 2025 Maudy Pratiwi Novia Matovanni, Erisa Nur Jannah, Aliyya Nisa Budi Utami, Damara Ramadhani Maritza, Beta Cahaya Pertiwi https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/149 2025-11-22T09:01:39Z ijeise:ART driver

Integration of Waste Management and Environmental Impact Assessment for Sustainable Manufacturing in Sukolego Tofu Production P.A. Islami, Mega Cattleya Harnaningrum, Rizky Novera Waste Management Environmental Impact Assessment Sustainable Manufacturing Tofu Production The tofu production process, particularly in small- to medium-scale industries like Sukolego Tofu Production, generates various types of waste that pose environmental challenges. This study aims to integrate waste management practices and environmental impact analysis within a sustainable manufacturing framework. This study uses a quantitative method with a causal associative approach to measure Waste Management (X1), Environmental Impact Assessment (X2), and Sustainable Manufacturing (Y). Data was collected through questionnaires distributed to 50 people living around the Sukolego Tofu Factory.  Data that meets the validity, reliability, and classical assumption tests is processed to produce a linear regression equation. The analysis results indicate that the Environmental Impact Assessment (EIA) variable has a positive and significant effect on Sustainable Manufacturing, both partially and simultaneously. However, the Waste Management variable does not exhibit a significant effect. This is supported by the significance (Sig.) values, where the EIA variable yields a value of 0.004 (p < 0.05), indicating statistical significance, whereas the Waste Management variable yields a value of 0.702, which is not statistically significant. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/149 10.33005/ijeise.v6i2.149 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 71-77 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/149/84 Copyright (c) 2025 Mega Cattleya P.A. Islami, Rizky Novera Harnaningrum https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/150 2025-06-02T03:17:28Z ijeise:ART driver

Analysis of the Effect of Labor Quantity on the Output Value of Micro-Industries in Indonesia Using Simple Linear Regression Method Nugraha, Isna An Khofiyah, Nida Ramadhan, Gilang Aryanti, Friska Labour Micro-Industry Output Value Regression In the current era of globalization, rapid advancements are driving nations to compete in strengthening their economies. Companies and industrial enterprises play a vital role as economic units actively contributing to national economic activities. Economic growth is closely associated with the output value of industries, which is significantly influenced by the number of workers. This study aims to examine the effect of the number of workers in micro-industries on the output value of micro-industries in Indonesia. The research employs two variables: the independent variable (X), representing the number of micro-industry workers, and the dependent variable (Y), representing the output value of micro-industries. A simple linear regression analysis was applied to measure the extent of the relationship between these variables. The results show a regression equation of Y = 217.512,365 + 46,669X with a coefficient of determination (R²) of 0,896, indicating that 89,6% of the variation in output value can be explained by the number of micro-industry workers. This suggests a strong influence of labor quantity on micro-industry output in Indonesia. UPN Veteran Jatim 2025-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/150 10.33005/ijeise.v6i1.150 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 1 (2025): IJEISE; 15-21 2721-8775 10.33005/ijeise.v6i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/150/77 Copyright (c) 2025 Isna Nugraha, Nida An Khofiyah, Gilang Ramadhan, Friska Aryanti https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/155 2025-06-02T03:17:28Z ijeise:ART driver

Comparative Analysis of Biomass-Based Adsorbents for Heavy Metal Ion Removal Pertiwi, Beta Cahaya Firginia, Noni Satyasyauqi, Muhammad Fauzan Matovanni, Maudy Pratiwi Novia biomass heavy metal removal sustainable remediation This study investigates the adsorption capabilities of various biomass-based adsorbents for the removal of heavy metal ions from industrial wastewater. This research focusses on the comparative effectiveness of chemical and steam activation methods. Steam-activated adsorbents derived from wine sector waste exhibited a maximum adsorption capacity for Pb²⁺ ions of 399 mg/g. Adsorbents derived from walnut shells and chemically activated with HNO₃ ions exhibited a maximum adsorption capacity of 204.08 mg/g for Cu²⁺ ions. Steam-activated spruce sawdust adsorbents achieved optimal adsorption of Fe²⁺ ions at a capacity of 329 mg/g. The adsorption capacity for Cd⁺ ions was determined to be 116 mg/g, achieved through microwave-assisted steam activation of palm kernel shell-based adsorbents. The research emphasizes the necessity of selecting appropriate activation techniques based on specific heavy metal ions and the desired adsorption properties. Additionally, there is a necessity for further investigation into the processes of pore structure development and their impact on adsorption effectiveness. The findings suggest that developing adsorbent from biomass waste represents a sustainable and effective method for reducing heavy metal contamination in industrial wastewater, thereby advancing environmental protection and resource efficiency. UPN Veteran Jatim 2025-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/155 10.33005/ijeise.v6i1.155 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 1 (2025): IJEISE; 30-37 2721-8775 10.33005/ijeise.v6i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/155/79 Copyright (c) 2025 Beta Cahaya Pertiwi, Noni Firginia, Muhammad Fauzan Satyasyauqi, Maudy Pratiwi Novia Matovanni https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/156 2025-06-02T03:17:28Z ijeise:ART driver

Mini Review: The Efficiency of Sugar Mills in East Java Province Rachmadhan, Aditya Arief Wijayati, Prasmita Dian Hariputra, Akbar Qalsum, Ummy Manihuruk, Ekamonika Asri, Dian Lainatussifa literature review sugar mills white sugar East Java Province is recognized as one of Indonesia’s main producers of the white sugar (plantation white sugar/gula kristal putih). However, The closure of these sugar mills raises an important question about the mills efficiency. The urgency of this study lies in the need to develop a comprehensive literature review that synthesizes existing findings on the production efficiency of East Java's sugar mills. The research was conducted in April 2025, using the literature review  method. The results shows that the efficiency of sugar mills in East Java Province remains below the optimal threshold, both technically and economically. This inefficiency is caused by several factors, including inconsistent sugarcane supply, outdated factory machinery, and socio-economic challenges such as price policy and the low welfare of farmers. Inefficiency has become one of the key reasons behind the closure of several sugar mills in East Java, particularly those owned by PTPN X and PTPN XI. UPN Veteran Jatim 2025-05-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/156 10.33005/ijeise.v6i1.156 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 1 (2025): IJEISE; 38-44 2721-8775 10.33005/ijeise.v6i1 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/156/81 Copyright (c) 2025 Aditya Arief Rachmadhan, Prasmita Dian Wijayati, Akbar Hariputra, Ummy Qalsum, Ekamonika Manihuruk, Dian Asri, Lainatussifa https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/174 2025-11-22T09:01:39Z ijeise:ART driver

Effect of Blower Power and Engine Speed Variations on Engine Component Temperatures Fueled by B40 and Off-Grade CPO Maulana, Ivan Saputro, Wilianadi Saputro, Erwan B40 CPO Biodiesel Temperature Diesel Engine This study examines the effect of blower power variation and engine speed on the temperature of diesel engine components fueled by B40 and off-grade Crude Palm Oil (CPO). The experiment was conducted using a Kubota RD 65 DI-NB diesel engine with a constant electrical load of 4 kW at two engine speeds: 1200 and 2000 RPM. The off-grade CPO was preheated to 100°C, while B40 was used without any special treatment. The blower air supply was varied from 0% to 100% to evaluate its impact on the engine’s thermal behavior. The results indicate that increasing blower power up to 100% causes a rise in temperature in the cylinder head, cylinder block, exhaust pipe, and coolant tank, whereas a decrease in temperature is observed in the intake pipe. Under all engine speed conditions, engines fueled with off-grade CPO showed higher average temperatures compared to those using B40, with increases of 4.81% in the cylinder head, 8.47% in the cylinder block, 10.16% in the intake pipe, 6.86% in the exhaust pipe, and 5.81% in the coolant tank. These temperature increases are attributed to the higher oxygen content and viscosity of off-grade CPO, which lead to larger fuel droplets and incomplete combustion, thereby increasing deposit formation. These findings highlight the significant influence of fuel characteristics and air supply on the thermal performance of diesel engines. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/174 10.33005/ijeise.v6i2.174 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 85-91 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/174/98 Copyright (c) 2025 Ivan Maulana, Wilianadi Saputro, Erwan Saputro https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/175 2025-11-22T09:01:39Z ijeise:ART driver

Optimization of Solar Energy for Control Systems and Electrical Grid Projections at Substations Permatasari, Ayunda Wulan Fauziyah, Nur Aini Moch.Syaifuddin Tanjung, Riadhi Fairuz Solar energy Solar panels Renewable Energy (EBT) Substation Efficiency energy This research examines the utilization of solar panels as an effort to optimize solar energy in the control systems and projections of the electrical grid at substations to support the transition to renewable energy in Indonesia. Dependence on fossil fuels, which causes high carbon emissions, and Indonesia's commitment to the Paris Agreement are the main backgrounds for this innovation. The system is designed using two 12 V solar cells connected in series to produce a 24 Vdc output, and is equipped with an automatic switching mechanism between the supply from the solar panels and National Power Plant (PLN). Observations over the course of one month showed an increase in current from 0.78 A to 1.55 A and power from 18.3 W to 38.2 W, indicating an improvement in energy conversion efficiency. However, the storage capacity significantly decreased from 35.56 Ah to 7.78 Ah, due to shorter charging durations and fluctuations in ambient temperature. This system has the potential to reduce dependence on fossil fuels, support sustainable electrification, and provide environmentally friendly electricity distribution solutions in areas not yet reached by conventional networks. Further development is needed in the energy storage aspect to enhance the overall performance of the system. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/175 10.33005/ijeise.v6i2.175 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 119-126 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/175/92 Copyright (c) 2025 Ayunda Wulan Permatasari, Nur Aini Fauziyah, Moch.Syaifuddin, Riadhi Fairuz Tanjung https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/181 2025-11-22T09:01:39Z ijeise:ART driver

Tailoring the Adsorptive Efficiency and Pore Characteristics of Silica through Solvothermal Treatment Assisted by Cetyltrimethylammonium Bromide (CTAB) Timu, Fransiska Altrima Key Rahman, Nanik Astuti Silica sandblasting waste CTAB solvothermal Silica is a porous material widely utilized across various fields. One of the potential sources of silica is sandblasting waste, which contains more than 90% silica. This study aims to investigate the influence of Cetyl Trimethyl Ammonium Bromide (CTAB) concentration and solvothermal duration on producing silica with enhanced adsorption capacity and porosity. The independent variables in this research include CTAB surfactant concentrations of 0.1, 0.2, 0.3, 0.4, and 0.5%, as well as solvothermal processing times of 8, 10, 12, 14, and 16 hours. The optimal result was obtained with the addition of 0.5% CTAB and a solvothermal duration of 16 hours, in which SEM-EDX analysis revealed large visible pores formed by aggregates of fine particles arranged in a homogeneous structure. The adsorption capacity, using a methylene blue concentration of 30 mg, was found to be 27.1822 mg/g. Based on the study on the Enhancement of Adsorption Capacity and Porosity of Silica Using Cetyl Trimethyl Ammonium Bromide (CTAB) via the Solvothermal Method, it can be concluded that both adsorption capacity and porosity are influenced by the addition of CTAB, solvothermal duration, and the concentration of methylene blue used in the adsorption capacity test. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/181 10.33005/ijeise.v6i2.181 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 92-99 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/181/88 Copyright (c) 2025 Fransiska Altrima Key Timu, Nanik Astuti Rahman https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/184 2025-11-22T09:01:39Z ijeise:ART driver

Characteristics of Synbiotic Drink from Jicama (Pachyrhizus erosus L.) Tubers and Sunflower (Helianthus annuus L.) Seeds Extract Winarti, Sri Jariyah Yusuf, Aulia Islamiati Arum, Ardilini Destyaning Synbiotic prebiotic Jicama Sunflower Synbiotic drinks are fermented beverages composed of ingredients that encompass prebiotics and probiotic bacteria. A study was conducted to develop a synbiotic drink using Jicama tubers extract and sunflower seeds extract along with the probiotic bacteria including Lactobacillus casei FNCC-0090, Lactobacillus acidophilus FNCC-0051, Bifidobacterium breve BRL-131, and Bifidobacterium bifidum BRL-130. The objective of this research was to assess the impact of varying proportions of Jicama tubers extract (Jc) and Sunflower seeds extract (Sf), as well as fermentation duration on the characteristics of synbiotic drinks. The experimental design employed a factorial completely randomized design with two factors: the proportions of Jicama and sunflower seed extract (75:25, 50:50, and 25:75) and fermentation time (8, 12, 16, and 20 h). Data from the study were analyzed using ANOVA (P<0.05), and significant differences between treatments were assessed by DMRT. The optimal treatment was determined at the 50:50 proportion of Jicama and sunflower seed extract, with an 20 h fermentation time, yielding a synbiotic drink characterized by total LAB of 11.34 log CFU/mL, total lactic acid of 1.29%, N-amino of 4.67 %, antioxidant activity of 33.5%, viscosity of 37.08 cP, inulin content of 1.03%, and vitamin E content of 0.58%. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/184 10.33005/ijeise.v6i2.184 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 100-109 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/184/89 Copyright (c) 2025 Sri Winarti, Jariyah, Aulia Islamiati Yusuf, Ardilini Destyaning Arum https://creativecommons.org/licenses/by-sa/4.0

oai:ojs2.ijeise.upnjatim.ac.id:article/186 2025-11-22T09:01:39Z ijeise:ART driver

Effect of Air Velocity on Temperature Distribution in B40 and B100 Oil Burners Rizqullah, Andre Rifqi Saputro, Wiliandi Saputro, Erwan Oil Burner Biodiesel Temperature Flame Combustion Dependence on fossil fuels has encouraged Indonesia to develop biodiesel, in line with the mandatory B40 policy. This study examines the effect of air velocity variations on the combustion performance of B40 (40% palm biodiesel and 60% diesel) and B100 (100% palm biodiesel) fuels. Experiments were conducted using an oil burner with air velocities of 20, 35, 45, 50, and 55 m/s. The flame temperature distribution was measured at distances of 150 mm, 300 mm, 450 mm, 600 mm, 750 mm, and 900 mm from the burner nozzle using a K-type thermocouple. The results showed that the flame temperature increased with air velocity, peaked at 45 m/s, and decreased at higher velocities. The B100 fuel produced a higher flame temperature than B40, with a maximum temperature of 1052°C. The decrease in temperature above 45 m/s is due to the cooling effect of the stronger airflow, which reduces combustion efficiency. The flame temperature also tends to decrease as the distance from the burner nozzle increases, reflecting the influence of turbulence and natural cooling on heat distribution. This study highlights the importance of controlling air velocity and measurement distance to optimize flame temperature and combustion efficiency in burner systems. UPN Veteran Jatim 2025-11-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/186 10.33005/ijeise.v6i2.186 International Journal of Eco-Innovation in Science and Engineering (IJEISE); Vol. 6 No. 2 (2025): IJEISE; 110-118 2721-8775 10.33005/ijeise.v6i2 eng https://ijeise.upnjatim.ac.id/index.php/ijeise/article/view/186/90 Copyright (c) 2025 Andre Rifqi Rizqullah, Wiliandi Saputro, Erwan Saputro https://creativecommons.org/licenses/by-sa/4.0