Structural Analysis
Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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Q4: A wastewater treatment plant as shown:
The surface area of each unit 800 m². Depth of each unit 2 m. and %BOD removal in
Primary and Secondary sedimentation tanks = 25%. Find:
1- Total % BOD removal in the plant.
2- BOD removal in the Trickling filter.
3- The flow rate (m³/d) in the plant.
r-150%
BOD, 180 mg/l
Pri. sed. tank
River
BOD,-20 mg/1
Trickling filter
Sec. sed. tank
(25 marks)
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Transcribed Image Text:Q4: A wastewater treatment plant as shown: The surface area of each unit 800 m². Depth of each unit 2 m. and %BOD removal in Primary and Secondary sedimentation tanks = 25%. Find: 1- Total % BOD removal in the plant. 2- BOD removal in the Trickling filter. 3- The flow rate (m³/d) in the plant. r-150% BOD, 180 mg/l Pri. sed. tank River BOD,-20 mg/1 Trickling filter Sec. sed. tank (25 marks)
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