What is sludge? Explain how it is Treated

Answer:

Sludge is the human waste that remains in the waste water after the sewage treatment process. It’s used to make biogas and manure, among other things. This is due to the fact that it is an organic waste.

Treatment:

Sludge is collected and degraded with the help of an anaerobic bacterium. The biogas produced is then used as a source of energy. Microbes and human faeces settle after an aerator tank, generating activated sludge. Water makes up 97 percent of activated sludge, which is dried with sand. The sludge is dried and used as manure.