Q. 53.6( 46 Votes )

What is sludge? Explain how it is treated?

Answer :

Semi-solid wastes like feces that settle down at the bottom during wastewater treatment are called sludge.


The sludge is removed using a scrapper and then transferred to a separate tank where it is decomposed by the anaerobic bacteria to produce biogas.


This biogas is used as fuel for cooking, heating, etc.

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