Sewage is mainly
1- Sould waste
2-Gaseous waste
3-Liquid waste
4-Mixture of solid and gas
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Sewage is the term used for wastewater that often contains faeces, urine and laundry waste. ... Sewage is treated in water treatment plants and the waste is often disposed into the sea. Sewage is mainly biodegradable and most of it is broken down in the environment.
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