Yunarwan, R.A., Larissa, S., Taufiqi, R. and Yogaswara, R.R. 2023. Optimization of Neutralize Crude Gypsum (NCG) Quality through Flash Dryer Utilization at Plant IIIA PT. Petrokimia Gresik. International Journal of Eco-Innovation in Science and Engineering (IJEISE). 4, 1 (Oct. 2023). DOI:https://doi.org/10.33005/ijeise.v4i1.115.