I agree that Metcalf and Eddy ...

Published August 29, 2018 21:15 by Andre Visser, Process Engineer at Water Engineering Consult

I agree that Metcalf and Eddy is the standard reference for the industry. However it covers an extremely wide range of subjects. I have attached a report by the South African Research Commission written by Prof. George Ekama et al. This report was extremely helpful in my career. If one works though this report it will give you a very good understanding of the EAAS process and positively assist with the design of such a system.

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First of all thanks because of your reply. but i have seen metcalf before and I did not find anything related to EAAS design. Is it completely similar to conventional activated sludge process?

Published August 30, 2018 19:38 by Iman Dorri

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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

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