1. 1 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 BOD, 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 BODs of 240 mg/L. Using the following assumptions, estimate the required volume of the aeration tank: a. BOD5 of the effluent suspended solids is 70% of the allowable suspended solids concentration. b. Growth constant values are estimated to be: K, = 100 mg/L BODs; kd =0.025 d 1; μm-10 d1; Y= 0.8 mg VSS/mg BOD, removed. c. The design MLVSS is 3,000 mg/L.