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The hydraulic retention time in extended aeration activated sludge systems is:
Question

The hydraulic retention time in extended aeration activated sludge systems is:

A.

4-5 hours

B.

4-6 hours

C.

8-10hours

D.

12-24 hours

Correct option is D


In extended aeration ASP. hydraulic retention time is kept higher in the range of about 12 to 24 hours whereas in conventional ASP, hydraulic retention time is kept between 4 to 5 hours.

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