Abstract:Fossil fuels are a primary energy source. Fossil fuels that are widely used are in the form of fuel oil, gas fuel, and coal. Along with technological developments, the need for fossil fuels is increasing, which is followed by the depletion of supplies. Therefore, renewable energy is needed which is cheap and easy to use on a household scale such as biogas. Therefore, renewable energy is needed, which is cheap and easy to use on a household scale such as biogas. The materials used as biogas are tofu liquid wast… Show more
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