Electricity Generator from Small Gasoline Engine Using Banana Leaf, Cow Dung and Grind Dried Soy Bean Biogas

Abstract

This research investigated for biogas electricity generator from small gasoline engine using banana leaf, cow dung and grind dried soy bean. Grind dried soy bean acts as the activator. The objectives of this research are to test the obtained biogas with small gasoline engine, to get an appropriate biogas and gasoline ratio, and lastly to compare gasoline consumption rate between gasoline and gasoline mixed with biogas.

The result found that biogas can use as co-fuel with gasoline at various ratio. Therefore, it can reduces gasoline consumption rate. The engine were tested at various volume ratio of biogas and gasoline which were  80:20, 60:40, 50:50, 40:60, 20:80 and 0:100 %V/V. The result found that CO₂ content and exhaust gas temperature are increase in according to biogas volume.  At ratio of 80:20 releases maximum of CO₂ and exhaust gas at 0.058 % and 58.9 °C respectively.  Minimum CO₂ and exhaust gas are occurred at ratio of 0:100 which are 0.041 % and 43.6 °C respectively.  In addition, gasoline consumption rate decreases as biogas volume increases. The ratio of 80:20 gives the lowest gasoline consumption rate at 0.0242 m³/kWh.