Sewage gas is a gas mixture that results from the digestion of organic waste into sewage. It consists predominantly of methane, hydrogen sulfide and carbon dioxide. A single person's waste generates about 30 liters of gas daily.
The H2S in sewage can affect the concrete sewers (especially the cement) due to conversion from oxygen-free to sulfuric acid. Therefore, main sewer pipes (trunks) are usually made of PVC. At critical points, sewers or pits are sometimes coated to prevent deterioration. Useful applications
By capturing the gas generated by degradation processes, especially on the rwzi, air pollution (greenhouse gas) occurs and can sometimes be used as well. The methane present in the gas can be used to generate electricity; Thus, gas in German cities like Essen and Munich was used as a source of energy for public transport.
: Biogas
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