What are the various components of domestic s | vedclass

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(A) Domestic sewage consists of $0.1\%$ impurities and $99.9\%$ water. It includes human excreta,food waste,detergents,and other household waste. The

Vedclass · Accepted Answer

Components: Suspended solids,colloidal materials,dissolved materials; Effects: Depletion of dissolved oxygen,$BOD$ increase,eutrophication,and death of aquatic organisms.

Vedclass · Answer

(A) Domestic sewage consists of $0.1\%$ impurities and $99.9\%$ water. It includes human excreta,food waste,detergents,and other household waste. The main components are:$(i)$ Suspended solids: Sand,silt,and clay.$(ii)$ Colloidal materials: Fecal matter,bacteria,paper,and cloth fibers.$(iii)$ Dissolved materials: Inorganic nutrients like nitrates,ammonia,sodium,and calcium.Effects of discharging sewage into a river:$(i)$ Water contamination: Sewage introduces pathogenic microorganisms,leading to waterborne diseases.$(ii)$ Increase in $BOD$: Microorganisms decompose organic matter,consuming large amounts of dissolved oxygen. This increases the $BOD$ (Biochemical Oxygen Demand),leading to the death of fish and other aquatic organisms.$(iii)$ Eutrophication: Excess nutrients (nitrates and phosphates) cause algal blooms,which deplete oxygen and disrupt the aquatic ecosystem.

What are the various components of domestic sewage? Discuss the effects of discharging sewage into a river.

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