What is sludge?Explain how it is treated.
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Semi-solids such as faeces that settle down during wastewater treatment are called sludge. This sludge is removed using a scraper and then transferred to a tank where it is decomposed by anaerobic bacteria to produce biogas. This biogas is used as a low- cost fuel for heating, cooking, etc. It is also used to produce electricity.
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sludge is a solid collected waste from water during waste water treatment plant.Sludge is decomposed in separate tank. Activated sludge is used as manure
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