Hi Iman. To my understanding it is essentially the same thing and the same design principles apply, except for the differences below. I find that sometimes there are different understandings of EAAS.  The only difference is that conventional AS could typically have primary settling tanks upstream to remove part of the organic load and operate at lower sludge ages and retention times. EAAS typically do not use primary settling tanks (and are therefore simpler) and is typically designed for longer sludge ages of 20 to 30 days, with hydraulic retention of 24 hours or more. Regards

Published August 31, 2018 09:45 by Andre Visser, Process Engineer at Water Engineering Consult