Question

give reason
we should pump air through clarified water.

Answer 1

Air is pumped into clarified water to help the aerobic bacteria to grow and allow them to work efficiently, their role is to remove the left over waste in the clarified water.

Answer 2

Cooking oils and fats should not be thrown down the drain. They can harden and block the pipes. In an open drain, the fats clog the soil pores reducing its effectiveness in filtering water. Oils and fats should be thrown in the dustbin.

hope this is helpful