A complete-mixed activated sludge process is to be designed to treat 5.0 MGD of primary effluent having a BOD5 of 180 mg/L. The requirement is that the effluent BOD5 and TSS concentration be 20 mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.6 mg VSS/mg BOD5, k=2.85d¹¹, Ks = 70 mg/L BOD5, and kå = 0.041 d´¹. Assume that the MLVSS concentration in the aeration basin is maintained at 2,500 mg/L. Determine: a. The minimum MCRT (d) b. The MCRT necessary to meet the requirement (d) C. The volume of the aeration basin (ft³)

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A complete-mixed activated sludge process is to be designed to treat 5.0 MGD of primary effluent
having a BOD5 of 180 mg/L. The requirement is that the effluent BOD5 and TSS concentration be 20
mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.6
mg VSS/mg BOD5, k=2.85d-¹, Ks = 70 mg/L BOD5, and kå = 0.041 d¹¹. Assume that the MLVSS
concentration in the aeration basin is maintained at 2,500 mg/L. Determine:
a. The minimum MCRT (d)
b. The MCRT necessary to meet the requirement (d)
C. The volume of the aeration basin (ft³)
Transcribed Image Text:A complete-mixed activated sludge process is to be designed to treat 5.0 MGD of primary effluent having a BOD5 of 180 mg/L. The requirement is that the effluent BOD5 and TSS concentration be 20 mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.6 mg VSS/mg BOD5, k=2.85d-¹, Ks = 70 mg/L BOD5, and kå = 0.041 d¹¹. Assume that the MLVSS concentration in the aeration basin is maintained at 2,500 mg/L. Determine: a. The minimum MCRT (d) b. The MCRT necessary to meet the requirement (d) C. The volume of the aeration basin (ft³)
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