Question

What is sludge? Explain how it is treated?​

Answer 1

Sludge is human waste (like faeces) in waste water left during sewage treatment. ... Sludge is collected by a scrapper. It is transferred to a separate tank where it is decomposed by the anaerobic bacteria. The biogas produced in the process can be used as fuel.

Answer 2

Answer:

Sludge is human waste (like faeces) in waste water left during sewage treatment. ... Sludge is collected by a scrapper. It is transferred to a separate tank where it is decomposed by the anaerobic bacteria. The biogas produced in the process can be used as fuel.