10.13 m3/s and a BOD of its own equal to 5.5 mg/l. The deoxygenation constant, Kd, is 0.20/day.Assuming complete instantaneous mixing, estimate the ultimate BOD of the river just downstream from the outfall.If the stream a constant cross section, so that it flows at a fixed speed equal to 0.25 m/s, estimate the BOD remaining in the stream at a distance 40 Km downstream.The BOD of the mixture of :effluent and stream would be mg/l 3.2 .a mg/l 0.23 .b mg/l 1.29 .C mg/l 13.45

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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A waste water treatment plant serving a.27
city of 350,000 discharges 1.73 m3/s of
treated effluent having an ultimate BOD of
60.0 mg/l into a stream that has a flow of
10.13 m3/s and a BOD of its own equal to
5.5 mg/l. The deoxygenation constant, Kd,
is 0.20/day.Assuming complete
instantaneous mixing, estimate the
ultimate BOD of the river just downstream
from the outfall.If the stream a constant
cross section, so that it flows at a fixed
speed equal to 0.25 m/s, estimate the BOD
remaining in the stream at a distance 40
Km downstream.The BOD of the mixture of
:effluent and stream would be
mg/l 3.2 .a
mg/I 0.23 .b
mg/I 1.29
.C
mg/l 13.45 .d
Transcribed Image Text:A waste water treatment plant serving a.27 city of 350,000 discharges 1.73 m3/s of treated effluent having an ultimate BOD of 60.0 mg/l into a stream that has a flow of 10.13 m3/s and a BOD of its own equal to 5.5 mg/l. The deoxygenation constant, Kd, is 0.20/day.Assuming complete instantaneous mixing, estimate the ultimate BOD of the river just downstream from the outfall.If the stream a constant cross section, so that it flows at a fixed speed equal to 0.25 m/s, estimate the BOD remaining in the stream at a distance 40 Km downstream.The BOD of the mixture of :effluent and stream would be mg/l 3.2 .a mg/I 0.23 .b mg/I 1.29 .C mg/l 13.45 .d
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