Abstract. An investigation on the feasibility of co-digesting Sewage Sludge with Palm Oil
Mill Effluent for enhancing the biogas production and the corresponding effect of the codigestion substrate ratio on the biogas production has been evaluated. Anaerobic co-digestion
of POME with SS was performed at ratios of 100:0, 70:30, 60:40 and 0:100 to find the
optimum blend required for enhanced waste digestion and biogas production. Single stage
batch digestion was carried out for 12 days in a laboratory scale anaerobic digester. Codigestion of sludge’s at the 70:30 proportion resulted in optimal COD and C: N ratio which
subsequently recorded the highest performance with regards to biogas production at 28.1 L’s
compared to the 1.98 L’s of biogas produced from digestion of SS alone. From the results
obtained, it is evident that co-digestion of POME and SS is an attractive option to be explored
for enhancement of biogas production in anaerobic digesters.