Raw Palm Oil Mill Effluent (POME) is considered as a highly polluting and must be treated prior to be released into waterways. In this study, the POME was treated with two types processes, (1) adsorption with palm oil mill fly ash (POMFA) activated with NaOH solution, (2) degradation with heterogeneous Fenton reaction using layered birnessite-type manganese oxide and porous cryptomelane-typ…