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3.5 A sedimentation tank of surface dimensions of 20ft by 100ft and over flow design of 500 gpd/ ft² can b) 2.5 MGD treat water with flow rate of up to: a)1.0 MGD c) 5.3 MGD d) 8.9 MGD 4.1. What is mean cell residence time in a WWTP activated sludge system receives 6 MGD if there are five aeration basins at 100,000 ft³ eachand four of them are working at any time. The MLSS is 2,500 mg/L and the effluent SS is 25 mg/L. The sludge wasted is 30,000 gpd from the recycle line. The SS of the recycle flow is 7,500 mg/L. b) 2.31 day a) 5.21 day c) 6.25 day d) 7.15 day

3.5 A sedimentation tank of surface dimensions of 20ft by 100ft and over flow design of 500 gpd/ ft² can b) 2.5 MGD treat water with flow rate of up to: a)1.0 MGD c) 5.3 MGD d) 8.9 MGD 4.1. What is mean cell residence time in a WWTP activated sludge system receives 6 MGD if there are five aeration basins at 100,000 ft³ eachand four of them are working at any time. The MLSS is 2,500 mg/L and the effluent SS is 25 mg/L. The sludge wasted is 30,000 gpd from the recycle line. The SS of the recycle flow is 7,500 mg/L. b) 2.31 day a) 5.21 day c) 6.25 day d) 7.15 day

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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3.5 A sedimentation tank of surface dimensions of 20ft by 100ft and over flow design of 500 gpd/ ft² can b) 2.5 MGD treat water with flow rate of up to: a)1.0 MGD c) 5.3 MGD d) 8.9 MGD 4.1. What is mean cell residence time in a WWTP activated sludge system receives 6 MGD if there are five aeration basins at 100,000 ft³ eachand four of them are working at any time. The MLSS is 2,500 mg/L and the effluent SS is 25 mg/L. The sludge wasted is 30,000 gpd from the recycle line. The SS of the recycle flow is 7,500 mg/L. b) 2.31 day a) 5.21 day c) 6.25 day d) 7.15 day
Transcribed Image Text:3.5 A sedimentation tank of surface dimensions of 20ft by 100ft and over flow design of 500 gpd/ ft² can b) 2.5 MGD treat water with flow rate of up to: a)1.0 MGD c) 5.3 MGD d) 8.9 MGD 4.1. What is mean cell residence time in a WWTP activated sludge system receives 6 MGD if there are five aeration basins at 100,000 ft³ eachand four of them are working at any time. The MLSS is 2,500 mg/L and the effluent SS is 25 mg/L. The sludge wasted is 30,000 gpd from the recycle line. The SS of the recycle flow is 7,500 mg/L. b) 2.31 day a) 5.21 day c) 6.25 day d) 7.15 day
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