Question

What is sludge? Explain how it is treated.

Answer shortly please​

Answer 1

Answer:

Sludge is the human waste that is present in the waste water which is left during the sewage treatment. It is used in the production of biogas and manure. This is because it is an organic waste. Treatment: Sludge is collected and decomposed using an anaerobic bacterium.

Explanation:

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Answer 2

Answer:

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