GATE CE 2020 Set 1 — Question 64
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Environmental Engineering → Wastewater Treatment Processes → BOD Kinetics
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Question
A stream with a flow rate of is having an ultimate BOD of . A wastewater discharge of having of joins the stream at a location and instantaneously gets mixed up completely. The cross-sectional area of the stream is which remains constant. BOD exertion rate constant is (logarithm base to ). The BOD (in mg/litre, round off to two decimal places) remaining at downstream from the mixing location, is ________.
Correct answer
49 to 50
Solution
1.Calculate the ultimate BOD of the wastewater ():
2.Calculate the initial ultimate BOD of the mixture ():
3.Calculate the travel time () to downstream:
4.Calculate the BOD remaining at ():
Rounding to two decimal places, the BOD remaining is .Continue learning with Success Tracker
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