Germicidal UV Water Filter Equipment for Cooling Tower Water
UV Water filter for Cooling Tower Water

The advantages of disinfection using UV
UV disinfection, with secondary dosing using a suitable biocide, is in fact one of the most cost-effective and efficient methods of reducing biofilms in cooling tower water. UV works instantaneously against all water-borne microorganisms, including bacteria, viruses, molds, spores and protozoa - including those resistant to chlorine. UV systems are also very easy to use and can be effectively monitored and integrated with online process control systems.
The only other requirement is residual disinfection. Because UV has no residual effect it cannot reduce levels of bacteria colonizing pipework walls. To achieve this, dosing with a secondary biocide is therefore required. Even though residual disinfection is always required, UV dramatically reduces the required frequency and level of secondary dosing and therefore reduces the costs and safety issues associated with purchasing, handling and transporting chemicals.
UV disinfection systems are very compact, modular and easy to install into existing water treatment systems. In addition, secondary dosing does not require the complex monitoring equipment necessary if biocides are used as a primary disinfectant. In addition, UV does not cause the formation of chemical disinfection by-products, many of which can have undesired effects of their own.
How UV works
UV is the part of the electromagnetic spectrum between visible light and X-rays. The specific portion of the UV spectrum between 185-400nm (also known as UV-C) has a strong germicidal effect, with peak effectiveness at 265nm. At these wavelengths UV kills microorganisms by penetrating their cell membranes and damaging the DNA, making them unable to reproduce and effectively killing them.
A typical UV disinfection system consists of a UV lamp housed in a protective quartz sleeve which is mounted within a cylindrical stainless steel chamber. The water to be treated enters at one end and passes along the entire length of the chamber before exiting at the other end.