When alum is added to the waste water containing calcium ions which compound is formed as a precipitate?

Civil Engineering : Waste Water Engineering - Quiz(MCQ)

Al(OH)â‚ƒ

CaCOâ‚ƒ

Ca(OH)â‚‚

Alâ‚‚ (SOâ‚„)â‚ƒ

Correct Answer : Al(OH)â‚ƒ

Explanation : When alum is added to a waste water containing calcium salts Al(OH)â‚ƒ is precipitated. This sis a gelatinous floc. This reaction sweeps out suspended particles

Recently Updated in Waste Water Engineering Questions

What is the growth of huge amounts of algae and other aquatic plants leading to the deterioration of the water quality called?

Algae growth

Eutrophication

Denitrification

Nitrification

Correct Answer : Option (B) : Eutrophication

Explanation : Eutrophication is the growth of huge amounts of algae and other aquatic plants leading to the deterioration of water quality. The untreated wastewater is rich in organic matter which demands oxygen.