A complete-mix activated sludge process with secondary clarification and sludge recycle is used to treat a dairy wastewater at a flowrate of 1000 m/d with a degradable influent COD of 3000 mg/L and BOD of 1875 mg/L. The MLSS concentration is 2800 mg/L, MLVSS/MLSS ratio is 0.80, effluent TSS concentration is 20 mg/L, hydraulic retention time 0 is 24 h, recycle MLSS concentration is 10,000 mg/L, and waste sludge flow rate from the recycle line is 85.5 m/ d. Using the given information, determine (a) aeration tank volume V (m), the system SRTO , the F/M ratio in g BOD/8 MLVSSd, and the volumetric BOD loading rate (kg/md); (b) the observed yield in terms of g TSS/ & BOD and g TSS/G COD (Assume the concentration of effluent soluble COD and BOD is not significant). (15 Marks)