When domestic sewage is mixed with river wate | vedclass

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Question

(B) When domestic sewage is discharged into a river,it contains organic matter that serves as food for microorganisms like bacteria. These microorgani

Vedclass · Accepted Answer

An increase in microbial activity that consumes dissolved oxygen.

Vedclass · Answer

(B) When domestic sewage is discharged into a river,it contains organic matter that serves as food for microorganisms like bacteria. These microorganisms multiply rapidly by decomposing the organic matter. This process requires a significant amount of oxygen,leading to a sharp decline in the dissolved oxygen $(DO)$ levels in the water. This phenomenon is known as Biochemical Oxygen Demand $(BOD)$ increase,which can lead to the death of aquatic organisms like fish.

When domestic sewage is mixed with river water,it leads to:

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