The high level of organic contaminants and total solid contained in Palm Oil Mill Effluent (POME) were reflected in its high values of COD, TSS and TDS, requiring a proper treatment prior to discharge into an environment. The adsorption-degradation processes were used to treat POME using bentonite as the adsorbent and MnO2/bentonite composite as the heterogenous Fenton catalyst. According …