Estimate the mass of oxygen to be supplied (kg/d) for the new activated sludge plant at Camp Verde ( Problems 16-3 , 16-8 , and 16-11 ). Assume that BOD5 = rbsCOD and that it is 68% of the bCOD.
Problems 16-11
Estimate the mass of sludge to be wasted each day from the new activated sludge plant at amp Verde ( Problems 16-3 and 16-8 ).
Problems 16-8
Determine the return sludge concentration ( X 'r ) that results in the maximum return sludge flow rate for Camp Verde’s proposed activated sludge plant described in Problem 16-3 . Also estimate the mass flow rate of sludge wasting. Use the following assumption:
MLVSS fraction of MLSS = 0.70
Problem 16-3
The town of Camp Verde has been directed to upgrade its primary WWTP to a secondary plant that can meet an effluent standard of 25.0 mg/L BOD5 and 30 mg/L suspended solids. They have selected a completely mixed activated sludge system for the upgrade. The existing primary treatment plant has a flow rate of 2,506 m3/d. The effluent from the primary tank has a BOD5 of 240 mg/L. Using the following assumptions, estimate the required volume of the aeration tank:
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