GATE ES · 2021 · ES
Question 55: Kinetics and reactor design
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Question 55
ESNAT2 marksNeeds review
A facultative pond system for sewage treatment consists of two ponds in series. The hydraulic retention time (HRT) of each pond is 6 days. The total BOD₅ reduction through the entire pond system is 90 %. If the ponds are considered to be completely mixed, then the rate constant describing the BOD₅ removal is ______ day⁻¹ (rounded off to two decimal points). Assume that the rate constant is same for both the ponds.
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2021ES
GATE ES 2021 · Paper 1
Environmental Science and Engineering · Original paper archive
- Section
- Environmental Science and Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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