A rapid sand filter for a town with water requirement of 1 MLD is to be provided with rate of filtration at 4000 l / hr / m2, with backwash system. What would be the size of the filter and its under-drainage system to the nearest approximation?

A rapid sand filter for a town with water requirement of 1 MLD is to b

1.	A rapid sand filter for a town with water requirement of 1 MLD is to be provided with rate of filtration at 4000 l / hr / m2, with backwash system. What would be the size of the filter and its under-drainage system to the nearest approximation?
A.	10 and 0.032 sq. m
B.	11 and 0.022 sq. m
C.	12 and 0.045 sq. m
D.	15 and 0.062 sq. m
Answer» C. 12 and 0.045 sq. m

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A rapid sand filter for a town with water requirement of 1 MLD is to be provided with rate of filtration at 4000 l / hr / m2, with backwash system. What would be the size of the filter and its under-drainage system to the nearest approximation?

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