GATE 2024 AR — Architecture – Question 18
Which is correct for an oxidation pond treating wastewater?
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Correct answer: (A) It is aerobic.
Explanation
In the simplified classification intended here, an oxidation pond uses oxygen-supported biological activity with algal photosynthesis and reaeration to reduce BOD, so A. Real facultative ponds can include anaerobic bottom zones, but describing the whole process as exclusively anaerobic is not the source’s intended choice.