A 5.2-mgd activated-sludge plant with 200 mg/l BOD and 220 mg/l suspended solids consists of a primary clarifier, aeration basin (dt = 8hr), and secondary clarifier. The primaries removal is 48 percent solids and 32 percent BOD. The aeration basin operates in a step feed at an MLSS of 3000 mg/l. Calculate the sludge solids and How rate where the primary solids concentration is 5.5 percent and the waste activated sludge is 0.5 percent.
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