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Efficient Production of Methane from Cow Dung by External Voltage Supply

Bikram Prajapati

Methane is the active component of biogas. Research has shown that methanogens can use supplied voltage to acquire the electrons for better the production of methane from CO2. In this process, methanogens reduce CO2 to CH4 utilizing electrons from externally supplied voltage on integrating with anaerobic digestion. Microbial electrochemical cells (MEC) was developed employing biocompatible fibrous graphite electrodes. Cow manure was assessed for the anaerobic digestion combined with MEC. The objectives of the study were to use manure waste and to enrich methane in biogas even at low temperature condition. The biogas produced contains mainly methane, hydrogen sulphide and carbon dioxide. The maximum gas production was at 37oC. However, biogas could be produced at 18oC with supply of 2V external power.