A completely mixed activated sludge process is designed for 50,000 PE. The design parameters are as follows: Volume of aeration tank Solids Retention Time (SRT) Sludge concentration in aeration tank Concentrated sludge in secondary clarifier Y ka : 2260 m : 10 days : 2800 mg/L : 10,000 mg/L : 0.5 kg/kg : 0.06/day If the BOD concentration after primary clarifier is 200 mg/L, determine: F/M ratio (i) HRT, in hr (ii) (iii) (iv) (v) Effluent BOD concentration The mass and volume of sludge to be wasted daily, in kg/d and m/d Recycle ratio (show mass balance around final clarifier)