WATER CLEANING PROCESSES
in Turkey and Sweden
pH level of water decreased
dramatically in Sweden
If we look at the water in the bare
nature such as in rivers and lakes it
is quite healthy but it is not drinka-
ble if you haven’t filtered and
boiled it first because it still con-
tains bacteria. And sadly because
of the uses of fossil fuels the pH
level of the water has decreased
dramatically. This affects both the
nature and the animals in the
Swedish eco system, because a
very few species can survive under
those conditions. One natural
detector that show us that the
water has a lower pH is waterlilies
because the really “enjoy” sour
water and therefore grows quite
fast.
As one way to counteract the
decreasing pH we add “lime” be-
cause of its high pH and it also
dissolve pretty easily in water. The
lime will then react with the Oxoni-
um ion in the sour water and then
creates carbon dioxide and water.
Our tap water on the other hand is
one of the healthiest and cleanest
in the entire world. One of the
reasons is that we have effective
way of cleaning our sewage water.
And the cleaning process is basical-
ly divided in these 3 main steps:
https://twinspace.etwinning.net/9538/pages/page/224424
1) Mechanical cleaning
A fence for the really big things that for some reason have been thrown in the water.
Sand for the particles that slip through the fence
Early sedimentation. (a comical is added to make the remains sink to the bottom)
2) Biological cleaning
In these stages “friendly bacteria and microorganisms” is added to break down materials
that consume oxygen.
Extra oxygen is also added to make up for eventual loss.
3) Chemical cleaning
This parts main job is to get rid of the phosphorus in the water. They do that by adding
chemicals to make salts that don’t dissolve in the water.
And finally the water is let out in to the nature again.
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