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an ultimate BOD of 5.0 mg

an ultimate BOD of 5.0 mg

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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A town on the bank of river Ganga discharges 18000 m³ day 1 of treated wastewater into the river. The treated wastewater has a BOD; of 20 mg L-1 and a BOD decay constant of 0.12 day-¹ at 20°C. The river has a flow rate of 0.43 m³ sec-1 and an ultimate BOD of 5.0 mg L-1. The DO of the river is 6.0 mg L-1 and the DO of the wastewater is 0.4 mg L-1. Compute the DO and initial ultimate BOD in the river, immediately after mixing.
Transcribed Image Text:A town on the bank of river Ganga discharges 18000 m³ day 1 of treated wastewater into the river. The treated wastewater has a BOD; of 20 mg L-1 and a BOD decay constant of 0.12 day-¹ at 20°C. The river has a flow rate of 0.43 m³ sec-1 and an ultimate BOD of 5.0 mg L-1. The DO of the river is 6.0 mg L-1 and the DO of the wastewater is 0.4 mg L-1. Compute the DO and initial ultimate BOD in the river, immediately after mixing.
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