The sun as a role model
The sun radiates light in different wavelengths (nanometer nm) to the earth. Some of this is visible light (colour spectrum) and some is not visible to the human eye. For the preparation of water, however, only ultraviolet light with a wavelength of 185 to 315 nm is of importance.
The ultraviolet rays of the sun kill off morbiferous microorganisms within seconds, thus preventing further spreading. The primary damage to the microorganisms during ultraviolet irradiation is based on a photosensitive alteration of the nucleic acids that prevents cell division. A very effective disinfection is achieved through this. The most efficient disinfection is achieved by ultraviolet rays with a wavelength of 254 nm.
Ozone (O3) is formed due to ultraviolet irradiation at 185 nm. It breaks down easily upon formation of oxygen and is thus deemed to be a good disinfectant and oxidant of many water-soluble, (partly persistent) substances.
The UVOX process
The trendsetting UVOX Process combines the disinfecting effect of ultraviolet light with the oxidising effect of Ozone and OH-Radicales in one single system with one single lamp.
The U.V. Disinfection guarantees a 99,9 % Killing Rate of all Bacteria, Viruses and Algae and harzardous Pathogens.
The UVOX process was invented by Mr. ing J.J. Berson as a further development of the ultraviolet technology:
By means of an ultraviolet lamp produced especially for Wapure air is irradiated with ultraviolet light with a wavelength of 185 nm. The oxygen in the air is converted into ozone by means of this ultraviolet irradiation. Ozone leads to oxidation of the pathogenic germs in the water (bacteria, viruses and algae) and parasitic dissolved matter (such as nitrite, cyanide, plant protectants/pesticides, chlorinated hydrocarbons, hydrosulphides/other odours, humic substances, pharmaceutical products). This air mixture is injected into the water Venturi injection system.
Water and the air mixture are irradiated again with ultraviolet light (254 nm) in the UVOX-250 reaction chamber. Through this, two types of processes take place:
- The ozone in the water is converted into OH- radicals, whereby the relative oxidation potential is increased from 1.52 (ozone value) to 2.05 (OH- radicals value). The remaining ozone content is destroyed.
In the majority of cases, an activated carbon filter for elimination of the ozone is therefore not required. OH- radicals have the greatest oxidation power and can reduce a variety of very persistent substances.
- Very efficient killing-off (up to 99.9%) of the germs and pathogens takes place by means of ultraviolet light irradiation (254 nm).
The UVOX process therefore offers advanced oxidation in which the ozone is irradiated again with UV-C light (254) nm. The resulting OH radicals (hydroxyl radicals) convert a large number of micro pollutants into stable inorganic compounds such as H2O, CO² and salt. Advanced oxidation process (abb. AOP), denotes a number of procedures for the chemical treatment of organic and inorganic water constituents by this extended oxidation.
In summary the UVOX-Process leads to:
The UV- Disinfection guarantees a 99,9 % Killing Rate of all Bacteria, Viruses and Algae and other harzardous Pathogens.
An additional Ozone Oxidation (Ozonation).
An `Advanced Oxidation Process` (AOP) in order to reduce serveral persistent water solved compounds:
- Reduction of micro pollutants
- Reduction of Pesticides and Biocides
- Reduction of Medicine, Hormones and Anti Biotica.
- Break down of Amoniac, Amonium and Nitrite (Aerobe Waterpurification)
- Reduction of unpleasant Odor, Smell and Taste.
- TOC Reduction
- Decrease of the chemical oxygen demand (DOC)