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The diagram shows a way that people could make their own electricity at home in the future by using compost.
Overall, the process starts with compost producing methane gas, and the gas is then used to produce electricity. There are several stages, and the electricity can be stored in a battery and used in the home.
First, a steel tank is filled about three quarters with compost, such as leaves and food scraps, and water. The compost ferments and produces methane gas. This gas goes out of the tank through pipes and is kept in a methane gas storage tank.
After that, the gas goes to a compressor, where it is compressed. The compressed gas then goes into a combustion engine, which burns the gas and produces mechanical energy. This mechanical energy is used by a generator to make electrical energy. Finally, the electricity is stored in a battery, and it can be sent to the house for home use. In this way, people do not need to buy electricity.