Question

Matter that settles down in the second Clarified Water sedimentation tank after aerobic decomposition is​

Answer 1

Answer:

Sludge is used to produce biogas. Clarified water is then passed through an aerator tank where air is pumped into the water. It helps aerobic bacteria to grow which decompose organic matter like human waste. After several hours, the suspended microbes settle at the bottom of the tank as activated sludge.