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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

• 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)

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

Purification of the water

The first step is to take it from a catchment point:

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

• 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)

• 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)

Sedimentation (Μεταγγίζω)

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

Filtration (Η διήθηση)

• Through a filtration process the residues that can be still in the water are eliminated.

Disinfection (Απολύμανση)

• This process make the water not dangerous for our health.

Transport of the water

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

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

• 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)

• 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

• 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

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

• 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.

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

Ευχαριστουμε!