MCQOPTIONS
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| 1. |
What is the retention time considered for the anaerobic zone for the A2O process for removing phosphorus? |
| A. | t0.5-1.5 hrs |
| B. | t1.5-2 hrs |
| C. | t5-7 hrs |
| D. | t3-4 hrs |
| Answer» B. t1.5-2 hrs | |