Mathematics · Environmental Engineering
A water sample has a Dissolved Oxygen (DO) of 8.6 mg/L initially. After 5 days of incubation at 20°C, the DO falls to 3.2 mg/L. What is the 5-day Biochemical Oxygen Demand (BOD) of the sample?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13.8 mg/L
- 211.8 mg/L
- 34.2 mg/L
- 45.4 mg/L✓
Correct answer
5.4 mg/L
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