What is the consequence of discharging organi | vedclass

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(C) When organic-rich domestic sewage is discharged into a river,it acts as a nutrient source for microorganisms like bacteria. These microorganisms d

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Fish die due to the lack of oxygen.

Vedclass · Answer

(C) When organic-rich domestic sewage is discharged into a river,it acts as a nutrient source for microorganisms like bacteria. These microorganisms decompose the organic matter,a process that consumes a large amount of dissolved oxygen $(DO)$ from the water. This leads to a sharp decline in the $BOD$ (Biochemical Oxygen Demand) levels and a significant reduction in dissolved oxygen. As a result,aquatic organisms,especially fish,die due to the lack of oxygen (hypoxia).

What is the consequence of discharging organic-rich domestic sewage into a river?

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