Distillers, which are used to make distilled water, usually have a uv light in the distilled water storage reservoir. the purpose of the uv light is to disinfect water by killing potentially harmful bacteria and viruses.
Ultraviolet treatment is a method of water purification in which ultraviolet light with a wavelength of 254nm is irradiated into the water to be purified. Irradiated light penetrates pathogens, causing genetic damage and thus preventing pathogen growth.
With this method of water treatment, no chemicals are added to the water because energy is simply added to it, and nothing is removed from the water or the likely killed microorganisms.
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