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Question

(A) Biochemical Oxygen Demand $(BOD)$ refers to the amount of dissolved oxygen that would be consumed if all the organic matter in one liter of water

Vedclass · Accepted Answer

increase

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(A) Biochemical Oxygen Demand $(BOD)$ refers to the amount of dissolved oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria.When a large amount of sewage (organic waste) is discharged into a river,the population of decomposer bacteria increases to break down this organic matter.These bacteria consume a large amount of dissolved oxygen from the water for the process of decomposition.Consequently,the $BOD$ of the river water increases significantly as the demand for oxygen by microorganisms rises.

If a large amount of sewage is discharged into a river,its $BOD$ will ......... .

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