Lestari, Indriana, Dwi Amalia, Widyawanto Prastistho, Jeremia Bernadin Perangin Angin, and Muhammad Haekal Zenatik. “Combination Process of Rice Husk Ash Coagulation and Electrocoagulation for Palm Oil Mill Effluent Treatment”. Eksergi 22, no. 2 (June 28, 2025): 113–119. Accessed December 5, 2025. https://jurnal.upnyk.ac.id/index.php/eksergi/article/view/14305.