what are the steps involved in purification of water for drinking purpose - Science - Water A Precious Resource

Question

what are the steps involved in purification of water for drinking
purpose??

Priya Chauhan · Accepted Answer

Dear student,

Steps involved in purification of drinking water:
Aeration – The raw water is directed to aeration tanks
where large quantities of air are injected in to reduce tastes and
odors
Flash Mixing – different chemicals are added depending on
the types and concentrations of impurities found in the raw water
Example: lime, sodium carbonate, alum etc
Flocculation – The chemicals react with the impurities
forming small particles of solid matter suspended in the water The
solid particles (floc) accumulate in feathery white
agglomerations
Settling - The water is sent to a clarifier where the floc is
allowed to settle out of the water The settled sludge is often
disposed of in a sewer
Filtration - The partially treated water is filtered through
sand and carbon to remove remaining solids
Additives - Chlorine is added to disinfect the water and to
prevent future growth of pathogens Lime and glassy phosphates may
be added to reduce corrosion of pipes carrying the water

Regards

what are the steps involved in purification of water for drinking purpose??

Flash Mixing – different chemicals are added depending on the types and concentrations of impurities found in the raw water.Example: lime, sodium carbonate, alum etc.

Flocculation – The chemicals react with the impurities forming small particles of solid matter suspended in the water. The solid particles (floc) accumulate in feathery white agglomerations.

Settling - The water is sent to a clarifier where the floc is allowed to settle out of the water. The settled sludge is often disposed of in a sewer.

Additives - Chlorine is added to disinfect the water and to prevent future growth of pathogens. Lime and glassy phosphates may be added to reduce corrosion of pipes carrying the water.