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The role of ultraviolet sterilizer (ultraviolet sterilizer) in water treatment


Ultraviolet sterilizer is a broad-spectrum bactericidal type, which can kill all microorganisms, including bacteria, tuberculosis, viruses, spores and fungi. Ultraviolet light is an electromagnetic wave with a wavelength between 16-397nm, and its photon energy is low enough to ionize atoms or molecules, so it belongs to non-ionizing radiation. According to the wavelength, ultraviolet rays can be divided into A wave, B wave, C wave and vacuum ultraviolet light.

Between the wavelength of 160-200, vacuum UV is very effective for the removal of TOC, and the removal rate of TOC is the highest when the wavelength is 185nm. The ultraviolet light used for disinfection and sterilization is C-wave ultraviolet light, its wavelength range is 200-275nm, and the band with the strongest bactericidal effect is 250-270nm. In this band, sufficient doses of strong ultraviolet light will be generated to irradiate liquids or air, instantly destroying The DNA and RNA in various bacteria, viruses and other microbial cell tissues, when the virus or bacteria absorb a dose of more than 6000-10000U.W.sec/cm2 under the irradiation of this wave band, the life center DNA (deoxyribonucleic acid) is If destroyed, it will die immediately or lose the ability to reproduce. Indispensable in water treatment equipment.

Application of UV ultraviolet disinfection equipment in water treatment system 1. TOC removal 2. Disinfection and sterilization 3. Ozone decomposition 4. Chlorine and chloramine removal Ultraviolet disinfection equipment parameter characteristics: 1. It can quickly and effectively kill various bacteria and viruses 2. Through photolysis, it can effectively degrade chloride in water; 3. Simple operation and convenient maintenance; 4. Small footprint, large amount of water to be treated; 5. No pollution, strong environmental protection, no toxicity Side effects; 6. Low investment cost, low operating cost, and easy equipment installation; 7. Using optical principles to design a unique inner wall treatment process, so that the cavity can maximize the use of ultraviolet rays and double the bactericidal effect. Matters needing attention and instructions for use 1. Ultraviolet rays cannot directly irradiate the skin of the human body; 2. Ultraviolet rays have certain requirements on the temperature and humidity of the working environment: above 20°C, the irradiation intensity is relatively stable; As the temperature rises, the irradiation intensity increases; when the relative humidity is below 60%, the bactericidal ability is strong; when the humidity increases to 70%, the sensitivity of microorganisms to ultraviolet light decreases; when the humidity increases to 90%, the bactericidal ability declines by 30% to 40%. 3. When disinfecting water, the thickness of the water layer should be less than 2cm. When the water flows through, the irradiation dose of more than 90000UW.S/cm2 can be used to achieve effective disinfection of the water.

4. When there is dust and oil on the surface of the ultraviolet lamp and sleeve, it will hinder the penetration of ultraviolet light, so it should be wiped frequently (usually once every two weeks) with alcohol, acetone, and ammonia water. 5. When the lamp is started, it takes several minutes to heat up to a stable state, and the terminal voltage is relatively high. If it is turned on again immediately after closing, it is often difficult to start, and it is easy to damage the lamp tube and reduce the service life of the lamp tube, so it is generally not suitable to start frequently.

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