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The role of ultraviolet sterilizers 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.

Parameter characteristics of ultraviolet sterilization equipment 1. It can quickly and effectively kill various bacteria, viruses and other microorganisms; 2. Through photolysis, it can effectively degrade chloride in water; 3. Simple operation and easy maintenance; 4. Small footprint , a large amount of water to be treated; 5. No pollution, strong environmental protection, and no toxic side effects; 6. Low investment cost, low operating cost, and convenient equipment installation; 7. The inner wall treatment process designed by optical principles enables the maximum Maximize the use of ultraviolet rays to double the bactericidal effect. Precautions and instructions for use of ultraviolet sterilizers 1. Ultraviolet rays cannot directly irradiate human skin; 2. Ultraviolet rays have certain requirements on the temperature and humidity of the working environment: above 20°C, the irradiation intensity is relatively stable; between 5 and 20°C When the relative humidity is below 60%, the bactericidal ability is strong; when the humidity increases to 70%, the sensitivity of microorganisms to ultraviolet rays decreases; when the humidity increases to 90%, the bactericidal ability declines by 30%~ 40%. 3. When disinfecting water, the thickness of the water layer should be less than 2cm, and the water can be effectively disinfected only by receiving an irradiation dose of more than 90000UW.S/cm2 when the water flows through.

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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