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प्रश्न
What do you mean by Biochemical Oxygen Demand (BOD)?
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उत्तर
Biochemical oxygen demand is the amount of oxygen required by bacteria to decompose organic matter in a certain volume of sample of water. Clean water would have a BOD value of less than 5 ppm, whereas highly polluted water has a BOD value of 17 ppm or more.
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संबंधित प्रश्न
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