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Q. |
What is the detention period of a clarifier used in the treatment of water? |
A. | 1hour |
B. | 2hours |
C. | 3hours |
D. | 4hours |
Answer» C. 3hours | |
Explanation: the detention period of a clarifier is lower than in the plain sedimentation tank and its range is 2.5 to 3 hours. |
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