Life-sustaining water: Requirements for hygienic air humidification

Multi-stage water treatment using the example of DRAABE in-room air humidification:

Water softening

The water treatment process begins with water softening. In this process, the water constituents primarily responsible for limescale formation (limescale dust) – calcium and magnesium – are replaced by easily soluble sodium salts

Filtration

Here, the treated soft water is purified via a two-stage mechanical filtration process. An activated carbon filter binds chlorine compounds, organic contaminants, pesticide residues and other chemical compounds. Suspended solids and impurities such as dirt, rust and sand particles larger than five thousandths of a millimetre are retained by the microfilter.

Reverse osmosis

The softened and filtered water then flows into the heart of the DRAABE water treatment system – the DRAABE PerPur pure water system. The DRAABE PerPur pure water system produces almost completely desalinated and germ-free pure water using high-quality membrane separation technology. Desalination takes place according to the principle of reverse osmosis: the saline water is forced through a semi-permeable spiral-wound membrane by a pump. Minerals and organic residues, such as fungi and bacteria, are retained, concentrate in the inlet chamber and are discharged into the sewage system as a concentrate. With a residual salt content of 2–3%, the purified water produced is optimally prepared for air humidification.

UVC-C irradiation

If a DRAABE high-pressure nozzle system is used, the purified water is now fed into the DRAABE HighPur high-pressure system. A special bioreactor ensures, via additional UV-C irradiation with monitored effectiveness, that even the last remaining residual germs in the inlet water are killed. The purified water, now perfectly treated for air humidification, is atomised without dripping, without lime dust and free from bacteria and germs.