Determine the required reactor volume, in million gallons (MG), for a completely mixed, aerobic, activated sludge system which will treat 1 MGD of domestic wastewater. The waste water has an initial ultimate BOD of 200 mg/L. The effluent requirement is 10 mg/L of ultimate BOD. The first order degradation rate constant is K = 0.1 L/mg-day, i. e. the governing equation is q = KSe for calculating the specific substrate utilization rate (q) through kinetic parameters. Se is the effluent ultimate BOD (i. e. 10 mg/L). The mixed liquor volatile suspended solids (X) equals 3,000 mg/L. What is the reactor volume? a. 0.095 MG
b. 0.063 MG
c. 0.92 MG
d. 0.13 MG