PLEASE DO NOT COPY OTHER PEOPLE'S WORK. VALUES ARE DIFFERENT.

Given a typical activated sludge WWTP with sludge wasting from the clarifier underflow, and given the following data: Q = 7.5 MGD; Qe = 7.3 MGD; S = 330 mg/L; S = 17 mg/L; X = 5,500 mg/L; X = 15 mg/L; a. Draw a simple sketch of the process, labelling as appropriate, the parameters listed above. b. Calculate the waste sludge volumetric flow rate, Qw, in L/day. c. Calculate the total biomass discharge rate (AX/At), in kg/day. d. Calculate the observed yield (Y) of biomass. e. The aeration tank has a volume of 12.0 million liters. If the solids residence time (SRT) is to be set at 5 days, calculate the biomass concentration that must be maintained in the aeration tank in mg/L