A wastewater stream A with 200 m3 /h of flow rate and BOD of 300mg/Imixes with stream B having flow rate of 400m3/h and BOD 225mg/l. Acompletely mixed activated sludge process is used to treat the mixture. BODof effluent stream is 10 mg/l. Given Y= 0.5, k=5 day", Kd=0.06 day ; Ks=100mg/l and MLVSS= 2000 mg/l. Assume all other parameters if necessaryFind (a) BOD and flow rate of mixture (b) Mean residence time (c) Oxygenrequirement (d) F/M ratio (e) Recycle ratio (f) Sizing of the tank

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A wastewater stream A with 200 m3 /h of flow rate an mixes with stream B having flow rate of 400m3/h and completely mixed activated sludge process is used to trea of effluent stream is 10 mg/l. Given Y= 0.5, k=5 day", Kd= ma/l and MI VSS= 2000 mg/LAssume all other parameters

A wastewater stream A with 200 m3 /h of flow rate an mixes with stream B having flow rate of 400m3/h and completely mixed activated sludge process is used to trea of effluent stream is 10 mg/l. Given Y= 0.5, k=5 day", Kd= ma/l and MI VSS= 2000 mg/LAssume all other parameters

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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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

A wastewater stream A with 200 m3 /h of flow rate and BOD of 300mg/I
mixes with stream B having flow rate of 400m3/h and BOD 225mg/l. A
completely mixed activated sludge process is used to treat the mixture. BOD
of effluent stream is 10 mg/l. Given Y= 0.5, k=5 day", Kd=0.06 day ; Ks=100
mg/l and MLVSS= 2000 mg/l. Assume all other parameters if necessary
Find (a) BOD and flow rate of mixture (b) Mean residence time (c) Oxygen
requirement (d) F/M ratio (e) Recycle ratio (f) Sizing of the tank

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