Question : BOD stands for:
Option 1: Biological Oxidation Demand
Option 2: Biological Oxygen Demand
Option 3: Biochemical Oxygen Demand
Option 4: Biotic Oxidation Demand
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Correct Answer: Biological Oxygen Demand
Solution : The correct option is Biological Oxygen Demand.
Biological Oxygen Demand, or BOD, is a measure of the amount of dissolved oxygen that aerobic bacteria consume while growing on organic matter present in a water sample over a specific period and at a specific temperature. In drinking water, BOD levels typically range from 1 to 2 ppm. Water is considered to be reasonably clean if its BOD value is between 3 and 5 ppm. However, contaminated water has BOD levels ranging from 6 to 9 ppm.
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