A completely mixed activated sludge process is designed for 50,000 PE. The design parameters are as...

 

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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 m³ : 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 m³/d Recycle ratio (show mass balance around final clarifier) 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 m³ : 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 m³/d Recycle ratio (show mass balance around final clarifier) 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 m³ : 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 m³/d Recycle ratio (show mass balance around final clarifier)

Answer rating: 100% (QA)

i HRT hydraulic retention time Given Design PE population equivalent 50000 Volume of aeration tank 2260 m3 To calculate flow rate Q Design PE 50000 x ... View the full answer