Stage 1:
(i) Filtration at intake.
(ii) Water is made to pass through a series of serves in to intake pipes.
(iii) Large solid particles are reserved
Stage 2:
-Softening of water.
-Water is mixed with soda ash (sodium bicarbonate) which softens it and a turn.
(Aluminium sulphite) which coagulates solids particles.
Stage 3:
-Coagulation and sedimentations.
(i)Solid particles settle down.
(ii)Aeration in the open tanks for 36hrs to kill Bilharzia worms.
Stage 4:
Filtration:
-Water pass through layers of different sizes gravel and sieved to remove all the remaining solid
particles.
Stage 5:
Chlorination:
-Chlorine is added to the clean water to kill micro-organisms.
Stage 6: Storage:
(i)Treated water is stored in large tanks.
(ii) Water is well covered
(iii) Water is distributed to consumer from the storage tank.
monica20 answered the question on October 11, 2017 at 06:50
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