Evaluation of the production of biogas from the codigestion of jatropha press cake and chicken manure

Abstract

Anaerobic co-digestion of jatropha cake and chicken manure was investigated in a batch process. Experiments were designed with different mixing ratios and different parameters that affect biogas production were investigated. Five lab scale digesters A, B, C, D and E were prepared to digest the solid substrates. Sun dried CM was used during the codigestion process and the process was carried out at room temperature and pressure. The water displacement technique was utilised to examine the capacity of the produced gas. It was found that the production rate of biogas increased with an increase in temperature and pH, thus biogas production is temperature and pH dependent. A maximum biogas yield of 210 ml was recorded and its mixture ratio of 75%JC: 25%CM was chosen as the optimum mixing ratio.