MCQOPTIONS
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| 1. |
At which point, chemical addition for phosphorous removal can t be carried out? |
| A. | tPreliminary treatment |
| B. | tPrior to primary sedimentation tank |
| C. | tPrior to secondary treatment |
| D. | tAfter secondary treatment |
| Answer» B. tPrior to primary sedimentation tank | |