Question

what is sledge? explain how it is treated​

Answer 1

Answer:

Sludge is human waste (like faeces) in waste water left during sewage treatment. Since it is organic waste, it is used to produce biogas and manure. Sludge is collected by a scrapper. It is transferred to a separate tank where it is decomposed by the anaerobic bacteria. ... The activated sludge is about 97% water.

Explanation:

hope it helps!