Internationale Zeitschrift für Abfallressourcen

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Biogas Potential from the Treatment of Solid Waste of Dairy Cattle: Case Study at Bangka Botanical Garden Pangkalpinang

Fianda Revina Widyastuti, Purwanto and Hadiyanto

Bangka Botanical Garden is an integrated cattle farm treating cattle solid waste as an energy source to produce biogas as fuel for gas stoves. At present, they make use of 132 kg of cattle waste from 5 cows and produce only 1 m3 of gas per day. This paper will discuss energy need, economic and environmental aspects of using cattle waste to produce biogas and the use of biogas to satisfy the need for electricity in the BBG farm. This study is descriptive in character. The data were collected through observation, measurement and interviews with informants. The biogas obtained could be used to provide lighting in the pens amounting to 60-100 W for 50 hours, as automotive fuel for a 1 HP engine for 17 hours, producing 39 kWh of electricity sufficient to cook three dishes for 40-48 servings. Producing 39.48 kWh of electricity per day, the generator could supply electricity in BBG farm using 35 light bulbs of 25 W each, switched on 12 hours per day. Thus, the electricity needed for lighting was 10 kWh per day. The milking machine needed 0.55 W per milking, or 1.1 W per day of two milking. The rest of the energy could be used to run water pumps, mowers and welding machines. The BBG farm needs to increase the efficiency of digester use by employing the inactive digester and improve the electricity installation for lighting.