If someone could help me with this i'd appreciate it

1. A municipal WW activated sludge facility has the following characteristics: Flow = 7.2 million liters per day Influent BOD, = 200 mg/L Aeration basin volume = 3,000 m Two circular clarifiers (each with diameter = 20 m and depth = 4.0 m) Return activated sludge flow rate = 3.5 million L/day per clarifier MLVSS concentration = 3,500 mg/L Effluent VSS is negligible Sludge VSS concentration = 6,800 mg/L Determine the daily volume of sludge (liters per day) that must be removed to maintain a solids residence time of 5 days. = 2. 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. 3. Using at least two identical secondary clarifiers, calculate the diameter of each clarifier for an activated sludge WWTP that treats 12 MGD. The MLSS is 3,500 mg/L, and the recycle sludge rate is 5.0 MGD. Assume an HLR and SLR that are mid-range of the typical values given in Table 6.4. Calculate the area using each guideline, and pick the appropriate area. Specify the number of clarifiers and the diameter (ft) of each. Keep in mind that diameters must be specified in 5-ft increments. 4. Calculate the ground-level downwind center-line concentration of So, 15 km downwind from the source. The effective stack height is 85 m, the wind speed at effective height is 6.5 m/s, and the emission rate is 0.25kg/s. The atmosphere has a neutral stability. (Necessary tables, figures, and equations can be found in lecture slides)