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_______ is the ratio of volume of recirculated sewage to the raw sewage.

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in Environmental Engineering by (81.4k points)
_______ is the ratio of volume of recirculated sewage to the raw sewage.

(a) Recirculation factor

(b) Recirculation ratio

(c) Food to mass ratio

(d) BOD

This question was posed to me in final exam.

Enquiry is from High Rate Trickling Filter and Secondary Clarifier in portion Sewage Filtration and Activated Sludge Process of Environmental Engineering

1 Answer

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Best answer
Right choice is (b) Recirculation ratio

The best explanation: Recirculation ratio is the ratio of volume of recirculated sewage to the raw sewage. It is denoted by R/I where, ‘R’ is the recirculated sewage and I is the volume of raw sewage.

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