What do you mean by Biochemical Oxygen Demand $(BOD)$ ?
What do you mean by Biochemical Oxygen Demand $(BOD)$ ?
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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