What is the retention time considered for the anoxic zone for the A2O process fo

Question - What is the retention time considered for the anoxic zone for the A2O process for removing phosphorus?

Options:

A . 0.5-1 hrs

B . 1-2 hrs

C . 2-4 hrs

D . 4-6 hrs

Answer: Option A
Answer: (a).0.5-1 hrs

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