

MCQOPTIONS
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1. |
Calculate the residence time for the following data.Influent nitrate: 22 mg/LEffluent nitrate: 3 mg/LOverall denitrification rate: 0.038 per day.MLVSS: 2000 mg/L |
A. | 1.5 hrs |
B. | 5 hrs |
C. | 6 hrs |
D. | 9 hrs |
Answer» D. 9 hrs | |