Effect of co-digestion on the lipid inhibition in anaerobic digestion of desiccated coconut wastewater

Abstract

Seven anaerobic batch reactors were run varying the Desiccated Coconut wastewater (DC) to Food Waste (FW) ratio at room temperature and the daily gas production and CH4 content was determined. Mono digestion of DC wastewater with a lipid concentration of 1600 mg/L showed significant lipid inhibition. All the co-digestion experiments resulted in enhanced biogas production. The highest methane percentage of 78.19% was obtained in the reactor with the DC:FW ratio of 3:2. The results suggest that the application of co-digestion effectively overcome the lipid inhibition in the anaerobic digestion of desiccated coconut wastewater with an enhanced methane production.