2012.08.27
WATER
TREATMENT PLANT AT RADDOLUGAMA
Do you use
pipe born water?
Definitely
your answer should be ‘yes’.But ever did you think that, how has these water
been treated?
27.08.2012-We
visited to water treatment plant at Raddolugama,to see how our water sources
was treated before distribute.
Raddolugama
water treatment contains 2 treatment units which supply water to houses in the
scheme ,surrounding villege, Wijaya kumaratunge memorial hospital, police
station and army base Seeduwa, and Katunayaka industrial zone.
This treatment
process is contained several steps.
1. Pump from
the river- water is pumped from 2 large wells that situated near the Dandugan
oya.
2. Aeration- In
this step water is whirled in the air to mix with oxygen. While mixing with
oxygen, water is oxidized and ions and other particles in the water are broken
down. During aeration Al2SO4
and Ca(OH)2 is added.
3 .Sedimentation-
In the sedimentation tank ,water slowly flows through parallel steel plates
which stand at an angle. When the mud floccules hit the plates, floccules sink
and are collected in the bottom of the tank. During this process mud and other
particles are separated from the water.
4. Filtering-
Mud free water then enter to filter tanks. Filters are composed of,
Superficial layer-sand
Middle layer-granite
chips
Deeper layer-Concrete
slabs with nozzles
5. Storage-
Filtered water is stored in tow large tanks which are cowered by granite chips
to avoid get heated from direct sun light.
6.
Clorination- clorine gas is bubbled through the water in storage tanks .
7.Distribution-Pumps
to regional tanks and then to houses.
me of student /Date of Visit/post number (1/2/3/4 etc)
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