Design a multi-stage RBC WWTP to treat the following wastewater for BOD removal. Influent flow = 6,000 m3/d, influent BOD5 = 260 g/m3, primary clarifier removes 35% of BOD5, total effluent BOD5 and effluent TSS = 20 g/m3, effluent soluble BOD5 (sBOD5) = 10 g/m3, and T = 10∘C. Determine:
a. The number of stages and number of trains.
b. The soluble BOD5 in the effluent from each stage (g/m3).
c. The organic loading on the first stage (g/m2 ⋅ d).
d. The overall organic loading to the RBC WWTP (g/m2 ⋅ d).
e. The overall hydraulic loading rate to the RBC WWTP (m3/m2 ⋅ d).
