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The BOD₅ load is 2,400 lb/day and the aeration basin contains 12,000 lb of MLVSS. What is the F/M ratio?

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2 lb BOD₅/day per lb MLVSS0.02 lb BOD₅/day per lb MLVSS0.4 lb BOD₅/day per lb MLVSS0.2 lb BOD₅/day per lb MLVSS

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This family teaches the governed arithmetic relationship only. It does not label one F/M value as correct or recommend process changes.