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The filter material used in contact bed is ___________

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+1 vote
in Environmental Engineering by (81.4k points)
The filter material used in contact bed is ___________

(a) Sand

(b) Stone ballast

(c) Gravel

(d) Fine sand

The question was posed to me in homework.

My question is based upon Types of Sewage Filter topic in section Sewage Filtration and Activated Sludge Process of Environmental Engineering

1 Answer

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Best answer
Right answer is (b) Stone ballast

The explanation is: The filter material used in the contact bed is broken stones called as stone ballast.

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