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If you want to use your biogas digester to power an engine, it should be producing at least10 meter cube of biogas per day. To generate 1 kWh (kilowatt hour) of electricity with a generator, about 1m3 biogas is required. So the 10m3 biogas will generate 10kwh of electricity.


Image source: https://www.pinterest.co.uk/explore/anae...digestion/

Thanks. I think it also depends on methane content of the biogas.

If people can run petrol gen on cooking gas, it is also possible to do same with biogas. Great idea.