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Process of Wastewater Treatment

How sludge us...

Question

How sludge useful after its treatment?

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Solution

Dear student,
Solids like faeces settle at the bottom and are removed with a scraper. This is the sludge.
After water treatment, the sludge is produced which is used as manure, returning organic matter and nutrients to the soil.

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Process of Wastewater Treatment

Standard XII Biology

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