Question

what is the purpose of lubbling air into the aeration tank ?

Answer 1

The purpose of bubbling air into the aeration tank is the process of removing the carbonaceous pollution and to allow the biological flocs to settle, thus separating the biological sludge from the clear treated water.
I think its clear......!!

Answer 2

In aeration tanks, it's ensures the presence of dissolved oxygen so that it allows the growth of microbes for sewage water treatment.As a result of this, air bubbles starts to raise up in more numbers.This is the cause of the bubbling air.
Thanks