Analysis of Palm Oil Mill Effluent Quality Surya Eka Putra, Indang Dewata, Eri Barlian, Nurhasan Syah, U. Iswandi, Mulya Gusman, Ali Amran and Alya Fariani E3S Web Conf., 481 (2024) 03001 Published online: 26 January 2024 DOI: 10.1051/e3sconf/202448103001