BOD value of sewage water than that of tap water is:
Correct answer: A. More
- A. More
- B. Less
- C. Equal
- D. Somewhere more somewhere less
Explanation
Sewage contains abundant biodegradable organic matter, so microorganisms require more oxygen to decompose it. Its biochemical oxygen demand is therefore higher than that of relatively clean tap water.
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Practise Forest Ecology
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