UV LEDs for Clean Water
Ultraviolet sterilization of water is a chemical-free process. UV-C radiation attacks the DNA of the bacteria directly. The bacteria lose their reproductive capability and are destroyed. Even parasites such as Cryptosporidia or Giardia, which are extremely resistant to chemical disinfectants, are efficiently reduced. The Catskill-Delaware Water Ultraviolet Disinfection Facility, consisting of a total of 56 UV reactors treat 2.2 billion US gallons a day to serve New York City. UV disinfection leaves no taint, chemicals or residues in the treated water.
Treating Skin Conditions
UV LEDs are used to deliver high power density of narrow band UV light to treat specific targeted areas of skin conditions including psoriasis, eczema and vitiligo in a fast and efficient method. High power deep UV light in the range from 300nm to 320 nm is the optimum wavelength range for a variety of phototherapies.
Drying of Inks & Adhesives
UV Leds are commonly being employed for the instantaneous drying of inks in industrial printers, adhesives used in a variety of industries including medical device manufacture and automotive assemblies and for drying of UV curable coatings. The UV led wavelength needs to be matched to the peak absorption of the photo-initiator used in the chemical formulation. The attraction of UV LEDs is their low power consumption, low heat input compared to traditional arc lamps for sensitive thin films and the ability to erradicate volatile solvents which harm the environment.