Civil Engineering MCQAE Level Civil Engineering
Rapid sand filters require
Environmental EngineeringGeneralMEDIUM
Choose the correct answer
A
no backwashing ever
B
only chlorination before filtration
C
only sunlight exposure
D
coagulation-flocculation and regular backwashing
Correct Answer
D. coagulation-flocculation and regular backwashing
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Rapid filters handle higher rates and need pretreatment and backwash cleaning.
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