Which of the following is correct regarding BOD Biological oxygen Demand ........

Environment and Ecology Water Pollution

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Which of the following is correct regarding BOD (Biological oxygen Demand)?

It is used for pollution level in urban areas atmosphere.

It is used for measuring oxygen levels in blood.

It is used for determining the oxygen demand at high altitudes.

It is used for measuring level of pollution in water bodies.

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Explanation:

Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period. Biological oxygen demand is term which used to determine the pollution level in water bodies.

Chemical Oxygen Demand (COD): A parameter of water quality which measures the amount of oxygen in parts per million required to oxidize organic and oxidizable inorganic compounds in the water sample. COD is preferable to the BOD because it is rapidly measurable parameter for river, streams and industrial waste studies and control of water treatmet plants.