The biogas, which consists of 50-75% methane, 25-45% carbon dioxide, 2-8% water vapor and traces of O2 N2, NH3 H2 H2S, is collected to generate electricity. In the phase, the sulphur content is needed to be minimized by filter and then the gas will be sent to the gas motor to generate electricity. Assuming 100 dogs come to our park every day, the dog waste generated can produce 80 cubic metres of methane. This biogas will produce 160 kWh of electricity in one digestion cycle of 20 days.