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A complete-mixed activated sludge process (CMAS) is to be designed to treat 7.0 MGD of primary effluent having a BOD5 of 170 mg/L. The requirement is that the effluent BOD5 and TSS concentrations be 20 mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.7 mg VSS/mg BOD5, k = 2.90 d-1, Ks = 80 mg/L BOD5, and kd= 0.043 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)

A complete-mixed activated sludge process (CMAS) is to be designed to treat 7.0 MGD of primary effluent having a BOD5 of 170 mg/L. The requirement is that the effluent BOD5 and TSS concentrations be 20 mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.7 mg VSS/mg BOD5, k = 2.90 d-1, Ks = 80 mg/L BOD5, and kd= 0.043 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)

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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A complete-mixed activated sludge process (CMAS) is to be designed to treat 7.0 MGD of primary effluent having a BOD5 of 170 mg/L. The requirement is that the effluent BOD5 and TSS concentrations be 20 mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.7 mg VSS/mg BOD5, k = 2.90 d-1, Ks = 80 mg/L BOD5, and kd = 0.043 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)
Transcribed Image Text:A complete-mixed activated sludge process (CMAS) is to be designed to treat 7.0 MGD of primary effluent having a BOD5 of 170 mg/L. The requirement is that the effluent BOD5 and TSS concentrations be 20 mg/L or less on an annual average basis. The following biokinetic coefficient obtained at 15°C: Y = 0.7 mg VSS/mg BOD5, k = 2.90 d-1, Ks = 80 mg/L BOD5, and kd = 0.043 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)
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