Περιγραφή της διαδικασίας καθαρισμού του νερού μέχρι να φτάσει στα σπίτια μας (ύδρευση)

1. TTο ταξίδι τουο ταξίδι του
νερούνερού

2. Public water in Germany and Spain
• In Spain the 99.3% of the water that are for public use can be used for drinking, the
only difference is the taste.
• In Germany more than 99% of all people are connected to a public drinking water-
provision
 that means less than 1% of Germans or Spanish get their water from springs

3. • In Spain and Germany the water is taken
from a catchment point (that can be a
river, a well, ground water, a reservoir…
etc.) and then some actions have to take
place to make it suitable for drinking:
 Pretreatment
 Coagulation-flocculation (Πήξη-
κροκίδωσης)
 Sedimentation (Μεταγγίζω)
 Filtration (Η διήθηση)
 Disinfection (Απολύμανση)

5. • When the water came from the mountains,
springs or clean ground water, the only
process that takes place is the
disinfection.

6. Purification of the water
The first step is to take it from a catchment point:

7. • Then from the reservoirs is going to a
station of water purification.

8. • Inside this station starts the process of
purification of water, with different
machines and methods the water get
cleaned.
– The first process is called pretreatment, here
the big dirt gets cleaned (like clothes, sand,
oil, stones…etc)

9. • It is a chemical process, and a substance
called flocs or flake put together the little
dirt that we cannot see and make them go
to the bottom of the deposit so it is not
going to the next phase.
Coagulation-flocculation (Πήξη-
κροκίδωσης)

10. Sedimentation (Μεταγγίζω)
• The heaviest part of the water (it means
the one with the dirt) is separated from the
cleaned water that is lighter.

11. Filtration (Η διήθηση)
• Through a filtration process the residues
that can be still in the water are
eliminated.

12. Disinfection (Απολύμανση)
• This process make the water not
dangerous for our health.

13. Transport of the water
• When the water is ready to use it travels
through big pipes until the deposits in the
cities.

14. • From the deposit and thanks to the pipes
under the cities, the water arrives to our
houses!

15. • the clean water (on the left side) is coming through pipes
from a water tank up on a hill which is saving the water
until it is needed
• the dirty water (on the right side) is leaded to a sewage
plant (η μονάδας επεξεργασίας λυμάτων)

16. • An European directive (η Ευρωπαϊκή Οδηγία) define how the dirty water is
cleaned in all countries  therefore we have almost the same cleaning
process of water as in Spain
• 66% of Germans get their drinking water from lakes and rivers.
• 4 M. Inhabitants (Germany has all in all 80 M.) get their water from λίμνη
της Κωνσταντίας (one of the biggest lakes in Germany)
Η λίμνη της Κωνσταντίας

17. • also ground water is a very important source in
Germany and Spain
 it’s easy to use, because it is already natural
cleaned through sand layers that work like a
filter for dirt and unhealthy bacteria
Water reservoir for ground water
-it’s like a big pool for drinking
Water where it stays for
some days and rests of dirt
and waste get destroyed

18. • Drinking water tastes better with oxygen
(το οξυγόνο )  that’s why it is added during
the purification.

19. • In most of the areas in Germany and Spain you can
drink water from the tap
• Sometimes, it doesn’t taste good, because too much
chlorine (chemical) is in there, e.g.  not healthy!
• Lot’s of people buy their water in supermarkets and a
few have access to springs.

20. https://www.youtube.com/watch?v=Msqu4cAQ76U
Ευχαριστουμε!