The detention period for oxidation ponds is usually kept as______________? / Environmental Engineering / By admin The detention period for oxidation ponds is usually kept as______________? A. 4-8 hours B. 24 hours C. 10 to 15 days(Correct) D. 3 months
The detention period for oxidation ponds is usually kept as______________? A. 4-8 hours B. 24 hours C. 10 to 15 days(Correct) D. 3 months