Question: solve A completely-mixed activated sludge process is to be designed to treat 20MGD of domestic wastewater containing 250mg/L of COD. Use the following design parameters

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A completely-mixed activated sludge process is to be designed to treat 20MGD of domestic wastewater containing 250mg/L of COD. Use the following design parameters in the design process: X=3000mg/LMLVSS, influent TKN =25mg/L. The following biokinetic coefficients should be used: Y=0.45mg VSS /mgCOD,k=7d1,Ks=75 mg/L, and kd=0.06d1. Determine the volume and oxygen required at a MCRT =12 days

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