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In recent years,major research has been focused on alternative and renewable energy sources to replace our current reliance on fossil fuel.Some microorganisms can convert chemical energy from a wide range of organic substances directly into electric current[1].As the microbial fuel cell (MFC) technology is getting nearer to practical applications such as wastewater treatment,A typical MFC comprises of a cathode,an anode,a cation or proton exchange membrane and an electrical circuit.In this paper,a microbial fuel cell (MFC) with a brush-shaped anode,platinum/carbon cathode[2],nafion membrane were constructed using pig farm wastewater as a substrate.Wastewater was treated by the fuel cell to decrease the chemical oxygen demand (COD),phosphorus and nitrogen and to produce electricity[3].The operational performance of the MFC was evaluated considering the organic matter removal,current and power densities.The OCV reached to a maximum value of 752mV.The fuel cell generated a maximum power of 20.3 W/m3 and achieved removal of 80 %COD,58 %total phosphorus (TP) and 91 %NH 4.