Assignment 7 sol

# Assignment 7 sol - = = = =(4 F/M 3 50 2000 200 150 = = = XV...

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CIVL242: Water and Wastewater Engineering Assignment 7 Solution 1. A pilot study using a 50-m3 bioreactor was conducted with the following conditions: Qo=150 m3/day So=200 mg/L Se=10 mg/L MLSS=2,000 mg/L Y and Kd were found to be 0.5 (g MLSS/g BOD5) and 0.07/day. Please determine: (1) Specific substrate removal rate (1/day) 1 285 . 0 ) 50 ( 2000 ) 10 200 ( 150 ) ( - = - = - = day XV S S Q e o o (2) Sludge age (day) 1 0 1425 . 0 5 . 0 285 . 0 ( - = × = - = day Y XV S S Q e o μ

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days days k k d c c d 14 9 . 13 07 . 0 1425 . 0 1 1 1 = - = - = = - μ θ (3) Hydraulic retention time (hr) hrs days Q V 8 3 1 150 50
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Unformatted text preview: = = = = (4) F/M 3 . ) 50 ( 2000 ) 200 ( 150 = = = XV S Q (5) Volume of aeration tank in real AS plant treating the same sewage having a flow rate of 50,000 m3/day. Approach I Same Hydraulic Retention Time as Pilot Plant 3 7 . 666 , 16 3 1 000 , 50 3 1 m V V Q V = = = Approach II Same F/M Ratio as Pilot Plant 3 7 . 666 , 16 ) ( 2000 ) 200 ( 000 , 50 3 . m V V XV S Q M F = = =...
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Assignment 7 sol - = = = =(4 F/M 3 50 2000 200 150 = = = XV...

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