Hello in your post and in ...

Hello in your post and in the answers made, one realizes that it is not done describing the function of the process of prolonged aeration.

It is therefore necessary to differentiate between the aeration function and the volume of effleutn to Aerate.

The more the volume of effluent is therefore and the longer the aeration process must be important. This makes it clear that this aeration process has a real effect on the effluent. 

What is it? Aeration removes and kills the anaerobic digestion of the medium, making the effluent inert.

Long before this aeration tank is put in place, the material is fissuraited under the effect of a strong digestion. 

Conclusion: The prolonged aeration that it is maximum for a large volume or for a small volume of effluent, does not change anything.