Consider the following statements with refrence to Biochemical Oxygen Demand BOD 1 It is amount of o...........

Environment and Ecology Water Pollution

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Consider the following statements with refrence to Biochemical Oxygen Demand (BOD):

1. It is amount of oxygen required by bacteria to break down the organic matter present in water.

2. It is expressed in milligrams of oxygen per litre of water.

Which of the statements given above is/are correct?

1 only

2 only

Both 1 and 2

Neither 1 Nor 2

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Explanation:

The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called Biochemical Oxygen Demand (BOD) also known as Biological Oxygen Demand. The amount of BOD in the water is a measure of the amount of organic material in the water, in terms of how much oxygen will be required to break it down biologically.