Water

Water
The area of water focuses on water treatment. The aim of water treatment is always to re-move specific substances from the water. This can be used to clean wastewater in a wastewater treatment plant prior to discharge into a body of water. The aim of water treat-ment may also be to make water usable for a particular purpose, e.g. in the treatment of potable water.

Non-biodegradable organic and inorganic substances can be removed by means of physical/chemical processes. Examples of this are water softening by ion exchange and the adsorption of chlorinated hydrocarbons on activated carbon.

Removal of undissolved substances (solids) is effected by mechanical processes. In mechanical processes, the solids are not altered either physically or chemically. Only separation of the solids from the liquid phase (water) takes place.

The aim of biological wastewater treatment is the elimination of organic, biodegradable materials. This elimination is carried out by microorganisms which use organic substances as a source of food. This biodegradation also causes a conversion of materials to take place.

Removal of undissolved substances (solids) is effected by mechanical processes. In mechanical processes, the solids are not altered either physically or chemically. Only separation of the solids from the liquid phase (water) takes place.

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