Biogas Production from Filter Mud in (CSTR) Reactor, Co-digested with Various Substrates (Wastes)

The anaerobic digestion of sugarcane filter mud and the option of co-digestion with bagasse, wheat straw and chicken manure in two mixing ratios were investigated. Experiments were carried out in mesophilic continuously stirred tank reactor (CSTR) at hydraulic retention times (HRT) of 15, 10 and 7 days. While the main anaerobic digestion process parameters monitored. The HRT of 15 days was proved as the optimum with maximum biogas production capability of 700±44 ml Ld-1 for digestion of filter mud, and slightly reduce in biogas production when the HRT was reduced to 10 and 7 days. The VS removal efficiency at all HRTs was about 3.80%, and the highest average of COD removal efficiencies was 25.23% in HRT of 15 days. Regardless the co-digestion of filter mud with wheat straw in 1:1 ratio presented higher biogas yield (811.11±30 ml Ld-1) than co-digestion with other waste in all proportions during steady state condition of 15 days HRT.