Hi Sunil, aeration is the ...

Published March 3, 2023 12:48 by Dirk Seghers, managing director at Aqua ICS

Hi Sunil,

aeration is the physical proces (different types possible) of getting oxygen in the mixed liquor.

activated sludge process is just the type of (aerobic) WWT process used. Other types are e.g.: different biofilm processes (mobile (e.g. MBBR) of stationary media (e.g. Trickling filter)) and eventually MBR-processes (which is in essence a type of activated sludge process, but in which sludge separation is done with a membrane).

extended aeration: is an activated sludge process, but one with a quite low organic sludge loading rate, or corresponding high sludge age (say, about > 25 days SRT. This value of 25 days is arbitrary and several authors use different values).