Intake
The intake screens prevent debris from entering
the treatment facility. The screens are located
off the bottom of the river to avoid bringing
sediments into the treatment plant and below the
surface to avoid bringing oils or other floating
material into the treatment plant.
Aeration
Aeration process involves bringing air to contact
with water to transfer volatile substances from
the liquid to the gaseous phase, thus increase
the dissolved air in water. It will improve taste
and odor and also oxidize iron and manganese.
Coagulation and Flocculation
Chemical coagulants are added to react with the
remaining small particles in the water to form
particles large enough to settle out. Rapid mixing
distributes the coagulant evenly throughout the
water. While, flocculation basins gently mix the
water with large submerged paddles so smaller
particles collide to form large particles called
"floc".
Sedimentation
Sedimentation is physical treatment process that
utilizes gravity to separated suspended solid
from water. Floc settles by gravity to the bottom
of a sedimentation basin. Then, clean water spills
over to the filters.
Filtration
Filtration removes any remaining particles that
carried over after sedimentation. The force of
gravity moves the water through filter media usually,
sand.
Disinfection
Chlorine adds to prevent bacterial contamination
as the treated water flows through the distribution
system to customers.
Fluoridation
Addition of fluoride to prevent dental caries
and tooth decay
PH Correction
Adjusted pH to be 7.0 at the outlet of contact
tank by adding lime.
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