What is ultraviolet irradiation?
Ultraviolet irradiation is sterilization of either water, air or objects using a certain wavelength of ultraviolet light. It is a common method of disinfection of waste water and drinking water for houses and institutions. This method of disinfection does not lead to toxic by -products that can be produced by chlorination. These wavelengths are measured in nanometers (nm). There are several different types of ultraviolet light (UV) and each has different wavelengths. Sunlight is all these, but short -term ultraviolet light (UVC) used in ultraviolet disinfection is proven by the Earth's atmosphere. So microorganisms do not have resistance to him. The maximum wavy in which DNA absorbs is 260 nm. At 254 nm, the DNA of microorganisms is damaged and cannot be reproduced. This ultraviolet radiation does not kill them, but are irreparably damaged. Such a UV sterilizer is effective against bacteria, viruses, parasites, mushrooms and disputes.
In order for the exposure to succeed, the microorganism must be in direct contact with UV light rays. Also for the functioning of UV water purifier, water cannot be cloudy. If it is cloudy, it must first be filtered or treated with activated coal. It is important that the light remains strong, so the lamp maintenance is an important part of the ultraviolet system. Home units should have an alarm that would be a warning if the lamp is not working properly.
Given the public concerns about toxic by -products of chlorine treatment, ultraviolet irradiation is used more often for wi cleaning of drinking water and waste water. One of the problems is that there will be no rest in the water that will continue disinfection after the light has penetrated. Therefore, if the water is contaminated after initial treatment, it will remain contaminated. For this reason, an ultraviolet water cleaner should be placed near the location of the final use to minimize any chances of subsequent contamination. DomesticUnit is ultraviolet irradiation often the last step in a process that may also include a different form of treatment such as water measurement or reverse osmosis.
Ultraviolet irradiation is particularly useful in the treatment of water houses that draw their supply from holes, lakes or streams. People who are worried about the effects of chlorine by -products usually breathe their water and use UV radiation to disinfection after this treatment. Commercial equipment is often easier to use the UV disinfection system to chlorine water. In this way, bottled water is also often disinfected.