Purwanto, C. V., Wagiman, W., & Jumeri, J. (2023). Effect of Addition of Palm Oil Empty Bunch Ash on Biogas Production from Palm Oil Mill Effluent. Agroindustrial Technology Journal, 7(2), 18–27. Retrieved from https://atj.journal.unida.gontor.ac.id/index.php/atj/article/view/78