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What Do You Mean by Biochemical Oxygen Demand (Bod)? - Chemistry

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

Define Biochemical Oxygen Demand (BOD)

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Solution 1

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

Solution 2

The amount of oxygen required by bacteria to breakdown the organic matter present in a certain volume of a sample of water is called Biochemical Oxygen Demand (BOD).

Solution 3

BOD - Biochemical Oxygen Demand
The water pollution by organic wastes is measured in term of BOD. It is the amount of dissolved
oxygen needed by bacteria in decomposing the organic wastes present in water.

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NCERT Class 11 Chemistry Textbook
Chapter 14 Environmental Chemistry
Q 13 | Page 413
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