drinking water treatment plants water adventure of İstanbul
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Drinking Water Treatment Plants
Water Adventure of
İstanbul
WATER ADVENTURE OF İSTANBUL
İstanbul acquiring water city identity with
Bosphorus and Golden Horn has experienced
serious water troubles from time to time since
it is far away drinking water sources and the
population of city has been increasing as the
day goes on. Rulers of each civilization
established in İstanbul were dealt with solving
the water problem of the city. Large water
pipelines were built; huge cisterns were built
during Roman Period to bring water to the
historical peninsula. In adition to repairing
water ways during Ottoman Period, new water
sources were searched and water trouble of
the city was terminated for that period
İstanbul grew increasingly. Its borders
extended. Villages transformed into towns,
towns transformed into almost big cities. In
parallel with it, since necessary
investments could not be done, the water
trouble of the city increased extremely
people waited in water queues with drums.
İSKİ got into the act to terminate ill
fortune of İstanbul.
İSKİ built damns, huge water
pipelines, treatment plants equipped
with the cutting-edge technology,
water tanks, elevation centers and
thousands of kilometer drinking water
supply network to bring new water
sources to İstanbul.
One of the most important parts of
this adventure meeting the people of
İstanbul with drinkable, abundant and
healthy water is Kağıthane Drinking
Water Treatment Plants. We made a
research trip to water treatment
plants where water comes to our
school.
Water is supplied to Kağıthane Drinking Water Treatment Plants established on the back of Kağıthane district being one of the historical regions of İstanbul from Terkos Lake and Alibeyköy Dams.
Aeration Unit
The first unit that raw water taken from the dam and lake enters to the plants is the Aeration Unit.
Pre-Ozonization Unit
Microorganisms in the water in Pre-Ozonization Unit are eliminated and taste and odor in water are corrected.
Raw Water Inlet Construction
Water is taken to Raw Water Inlet Construction of the plant via steel water pipelines of 2200 mm. Following pre-chlorination here water is passed through water energy break wall.
Fast Mixing Unit Slow mixing Unit
Substances with colloidal structure being of negative load in fast Mixing Construction are mixed with positive loaded Aluminum Sulphate ions added to the water homogeneously.
Setting Unit
Colloidal substances loads of which
are neutralized in fast mixer with the
effect of Aluminum Sulphate are
taken to mixing unit to become ball.
Water is mixed slowly and colloidal
substances are met each other.
Setting unit is the section where colloidal materials being flock in slow mixing unit and being in the raw water is seperated from water.
Sulphate
The water coming from
setting is conveyed to filter
unit after being chlorinated in
four seperate channels. The
purpose of chlorination is to
provide manganese oxidation
and to prevent chlorine by
products formation.
There are 20 fast sand filters each one of which consists of two divisions and being 108 m2 surface areas. There is sand with 1 m height and 0,8-1,25 mm diameter performing filtration process.
The system suspending the sand is porous concrete obtained from the gravel and cement mixture. Filters blocked are subjected to backwash operation by applying air and water from the lower part.
Engine
Filtration Unit
Clean Water Tank
The purified water
coming from the
Filter Unit is taken
to 15000 m3 and
30000 m3 clean
water reservoirs
after being subject
to final chlorinationNETWORK
After clarified water in Kağıthane Drinking Water Treatment Plants is collected in reservoirs, it
is supplied to the supply network .
And, this is the
last of the
adventure of
water up to our
school.
Clean water reservoir
Our School
We got Kağıthane Water Treatment
Plants’ water quality reports. The
reports prove that the result is
healthy and drinkable water. The
healthy and drinkable water
travels a long way to come to our
school from Kağıthane Water
Treatment Plants. So how can we
be stil sure of the drinking quality
of water, coming from the taps in
our school.
We searched and learned that the
pipes in İstanbul were changed
into polyethylene 2002. The pipes
in the location of our school and
inside the school were changed
into polyethylene in 2006. But our
school’s conctruction is very old
and therefore there are some iron
pipes that couldn’t be changed.
We don’t drink water from the taps
and the school pay money for
spring water stored in carboys.
Are these carboys healthy ?
We won’t be able to test every
carboy, so
our aim is to obtain healthy
drinkable tap water in our school.
In our research trip to İSKİ Water Treatment
Plants, we are thankful to environmental
engineer Nazlı Sezin Korkut and machine
technician Yavuz Karaca’ for their interest to
our project and the help for the information.