How is the water treated?

How is the water treated?

How is the water treated?

After pumping, thewater is treated by pre-oxidation with chlorine or ozone, clarified by decantation or filtration, then refined by filtration with activated carbon. She then receives disinfection during its passage through an ultraviolet filter or by chemical oxidation.

How is water wasted?

A faucet left open while brushing your teeth causes the waste 1 to 2 liters ofwater, or about 1,000 liters per year. Check your counterwater before and after a period of absence.

How to make water colorless?

Boiling, an effective but problematic method All you have to do is heat thewater at 100°C to kill most microorganisms (but not chemicals). In practice, according to WHO recommendations, it is necessary to heat thewater boil for 1 to 3 minutes for the render drinkable.

Where does the sewage go?

The waste are collected and transferred by a sewerage network to treatment stations, also called purification stations, with the aim of purifying them and eliminating the undesirable pollution they contain.

What are the uses of fresh water?

The total volume of fresh water withdrawn worldwide is, in 2012, 3,890 km 3 according to the FAO (representing 555m 3 / inhabitant / year). Industrial uses represent 20% and domestic uses 10%. While agriculture uses 70% of the water withdrawn for irrigation (up to 90% in some regions of the world).

How do you know if a substance contains water?

It is possible to determine if a substance contains water by carrying out the water recognition test. This test is based on the use of anhydrous copper sulphate, a substance which turns blue in the presence of water.

Why is sewage mixed with rainwater?

During collection, it happens that wastewater is mixed with rainwater. “To better regulate this flow, there are storage basins capable of temporarily retaining large volumes of water.” supports Bernard Loubière, network manager in the technical department of Lyonnaise des Eaux.

What are the uses of the water withdrawn?

By the fact that each country is characterized by a distribution of the uses of the water withdrawn which depends on its economic activities. In Poland, Denmark and the United Kingdom, more than 50% of samples are taken for domestic use. In Spain, agricultural uses predominate.