4. A wastewater treatment plant disposes of its effluents into a Units Effluent Stream Item m3/s mgll 0.20 0.50 Flow 2.00 8.00 Dissolved oxygen °C 26 22 Temperature mg/l 40 BOD, at 20°C Assume that the deoxygenation constant K, at 20°C (base e) = 0.20 d-1 and the re-aeration constant K, at 20°C (base e) Equilibrium concentration of dissolved oxygen C, for the fresh water is as follows: 0.40 d-1 for the mixture. %3D Temperature °C 18 20 22 23 24 25 26 C, (mg /1) 9.54 9.17 8.99 8.83 8.53 8.38 8.22 The velocity of the stream downstream of the point A is 0.2 m/ s. Determine Ee critical oxygen deficit and its location. TUS temperature coefficients of 1.04 for K, and 1.02 for K,)

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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. A wastewater treatment plant disposes of its effluents into a
fA and of the effluent are as below:
Units
Effluent
Stream
Item
m3 /s
0.20
0.50
Flow
mgll
2.00
8.00
Dissolved oxygen
°C
26
22
Temperature
mg il
40
BOD, at 20°C
Assume that the deoxygenation constant K, at 20°C (base e) = 0.20 d-1 and
the re-aeration constant K, at 20°C (base e)
Equilibrium concentration of dissolved oxygen C, for the fresh water is as
follows:
%3D
0.40 d-1 for the mixture.
Temperature °C
18
20
22
23
24
25
26
C, (mg /1)
9.54
9.17
8.99
8.83
8.53
8.38
8.22
The velocity of the stream downstream of the point A is 0.2 m/s. Determine
he critical oxygen deficit and its location.
[Use temperature coefficients of 1.04 for K, and 1.02 for K,]
Transcribed Image Text:. A wastewater treatment plant disposes of its effluents into a fA and of the effluent are as below: Units Effluent Stream Item m3 /s 0.20 0.50 Flow mgll 2.00 8.00 Dissolved oxygen °C 26 22 Temperature mg il 40 BOD, at 20°C Assume that the deoxygenation constant K, at 20°C (base e) = 0.20 d-1 and the re-aeration constant K, at 20°C (base e) Equilibrium concentration of dissolved oxygen C, for the fresh water is as follows: %3D 0.40 d-1 for the mixture. Temperature °C 18 20 22 23 24 25 26 C, (mg /1) 9.54 9.17 8.99 8.83 8.53 8.38 8.22 The velocity of the stream downstream of the point A is 0.2 m/s. Determine he critical oxygen deficit and its location. [Use temperature coefficients of 1.04 for K, and 1.02 for K,]
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