Mohamed Hasnain IsaWong Lai PengMohammed J.K. BashirNasir ShafiqShamsul Rahman Mohamed KuttyIzharul Haq FarooqiHow Chinh Lee2024-10-232024-10-232020-06https://doi.org/10.1016/j.scitotenv.2020.137833https://dspace-cris.utar.edu.my/handle/123456789/4375Improved anaerobic digestion of palm oil mill effluent and biogas production by ultrasonication pretreatmentjournal-article