GATE CE 2015 Set 2 — Question 59
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Environmental Engineering → Wastewater Treatment Processes → BOD Kinetics
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Question
Ultimate BOD of a river water sample is . BOD rate constant (natural log) is . The respective values of BOD (in %) exerted and remaining after 7 days are:
Correct answer
(C) 65 and 35
Solution
1.Given: Ultimate BOD , rate constant , time .
2.BOD exerted after time is .
3.Percentage of BOD exerted .
4.Calculation: .
5.Percentage of BOD remaining .
6.Thus, the values are 65 and 35.
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