Enhancing of Methane Production From Palm Oil Mill Effluent By Co-Digestion With Empty Fruit Bunch Pressed Wastewater At Mesophilic Condition Using An Anaerobic Batch Reactor
The pressing of palm oil fruit bunch (EFB) is new technology that is added in to palm oil process in order to recover oil that may result product yield and reduce oil in wastewater. This process also product high polluted wastewater with high VFA and COD that could be used as co-substrate for biogas production from palm oil mill effluent (POME). Therefore this study aimed to investigate the co-digestion of EFB pressed wastewater and POME in order to optimize the substrates co-digestion for higher methane production. The POME was mixed with various EFB pressed wastewater volume, 2.5%, 5% and 10% and the effect of seed concentration (35%, 50% and 75%) was determined. The result found was the maximum methane yield obtained was 218 mL CH4/g VSremoved with the condition of 0.9:0.1:1 of POME:EFB pressed waste water: seed. This co-digestion have been found to improve biogas and CH4 production yield by 96% and 97% respectively, in comparison to non-added co-substrate.
Keywords- Biogas, Methane, Wastewater, Palm Oil Mill Effluent (POME), Palm Oil Fruit Bunch (EFB)