BOD of raw municipal sewage may be in the range of about _____________ mg/litre?
Correct answer: C. 150-300
- A. 1-2
- B. 5-10
- C. 150-300
- D. 2000-3000
Explanation
Raw municipal sewage typically has a BOD of roughly 150 to 300 mg/L, reflecting its biodegradable organic load. Values near 1 to 10 mg/L describe relatively clean water, not untreated sewage.
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