Problem

A flow of 3 ML/d of raw sewage, with TSS = 220 ppm and BOD = 200 ppm, enters a conventiona...

A flow of 3 ML/d of raw sewage, with TSS = 220 ppm and BOD = 200 ppm, enters a conventional activated sludge treatment plant. Removal efficiencies in the primary clarifier for TSS and BOD are 60 percent and 35 percent, respectively. The primary and secondary sludges are combined and thickened to 6 percent solids. What is the total volume of thickened sludge generated in the treatment plant each day?

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