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The town of Camp Verde has been directed to upgrade its primary Waste Water Treatment Plant...

The town of Camp Verde has been directed to upgrade its primary Waste Water Treatment Plant (WWTP) to a secondary plant that can meet an effluent standard of 25 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 0.029 m3/s. 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

- BOD5 of the effluent suspended solids is 70% of the allowable suspended solids concentration.

- Growth constants values are estimated to be: Ks=100 mg/L BOD5; kd = 0.025 d-1; μm= 10 d-1; Y=0.8 mg VSS/mg BOD5 removed

. - The design MLVSS is 3000 mg/L

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