Besides to the potential of biogas application that is feasible (easily constructed), biogas production also provide economic value-added for society as a ready means of energy providers. Based on the calculation of the utilization of manure from two cattles, the biogas production can reach 1 m3 per day. One metric ton (1 m3) of biogas is equivalent to:
- 60-100 watt light bulb for 6 hours.
- 5-6 hours to cook using gas stoves
- Equivalent to 0.7 liters of gasoline
- Able to produce 1.25 kwh electricity
Biogas is a gaseous mixture of methane (60-70%), CO2 and other gases generated by bacterial methanogenesis found in swamps and ruminants stomachs like cattles and buffaloes.
Biogas formed through three stages: hydrolysis, acidification (acidification), and methanogenesis. In the hydrolysis stage, the molecules of oxidized enzymatically into short molecules. These short-chain molecules is degraded further into organic acids by acetogenic bacteria. Furthermore, organic acids are degraded into methane. The entire gas produced in the third stage of the process is called biogas.
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