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The application of ultraviolet sterilization technology in water treatment process

by:LiangYueLiang     2020-10-15
Sterilization


uv sterilization mainly use 254 nm wavelength ultraviolet light. The wavelength of ultraviolet light, even in trace amounts of ultraviolet projection doses, also can destroy the life of a cell core - — DNA, therefore prevent cell regeneration, the loss of regenerative capacity make it harmless bacteria, so as to achieve the effect of sterilization. Like all other uv application technology, the system depends on the size of the intensity of the ultraviolet radiation ( The strength and power of the lamp) And the contact time ( With air or water, liquid, the duration of exposure to ultraviolet light) 。





eliminate ozone


uv sterilization mainly use 254 nm wavelength ultraviolet light. The wavelength of ultraviolet light, even in trace amounts of ultraviolet projection doses, also can destroy the life of a cell core - — DNA, therefore prevent cell regeneration, the loss of regenerative capacity make it harmless bacteria, so as to achieve the effect of sterilization. Like all other uv application technology, the system depends on the size of the intensity of the ultraviolet radiation ( The strength and power of the lamp) And the contact time ( With air or water, liquid, the duration of exposure to ultraviolet light) 。


to reduce the amount of total organic carbon


in many high technology and laboratory equipment, organic matter could interfere with the production of high purity water. There are many ways to get rid of organic matter from water, the commonly used methods include the use of activated carbon and the reverse osmosis. Shorter wavelength of ultraviolet ( 185 nm) Also can effectively reduce the amount of total organic carbon ( Value is the radiator also produces a 254 nm wavelength ultraviolet light, and therefore can be disinfected at the same time) 。 Shorter wavelength of ultraviolet ray has more energy, so can break down organic matter. Ultraviolet (uv) oxidation of organic reaction process is very complex, its main principle is through the free hydroxide with strong oxidation ability, the oxidation of organic matter into water and carbon dioxide. Ozone and clearing system, the degradation of organic carbon of uv system the amount of uv radiation is three to four times more traditional disinfection system. Liquid sugar disinfection


most of the food and beverage manufacturers use liquid sugar in large quantities. Since sugar is easy to use of food by bacteria, so it is easy to make bacteria breeding. In addition, the liquid sugar is opaque, so it is difficult to sterilize. 254 nm wavelength ultraviolet can be used in the disinfection of liquid sugar products. To make up for the energy loss caused by the color and viscosity of liquid, an ultraviolet launcher needs to be tightly lined up many of the so-called


'thin film' reactor. Close combination of the radiator can provide the required amount of uv radiation is very high,


in order to for effective disinfection liquid sugar. Its ultraviolet energy output about 7 to 10 times that of the traditional disinfection system.


degradation of residual chlorine


in municipal water treatment and water supply systems, chlorine disinfection is very necessary.


but in the process of industrial production, in order to avoid adverse impact on the product, to remove the residual chlorine in the water often is necessary before processing. Basic method to eliminate the residual chlorine with activated carbon bed and chemical treatment. Activated carbon to deal with the drawback is that it requires constant regeneration, and often encounter the problem of bacterial growth. 185 nm and 254 nm wavelength ultraviolet (uv) have been demonstrated to effectively destroy residual chlorine and ammonia chloride chemical bonds. Although great uv energy is needed to play a role, but its advantage is that this method does not need to add any drugs into the water, don't need to store chemicals, easy maintenance, and at the same time and the role of sterilization and removal of organic matter.


surface and air disinfection


air disinfection and ultraviolet for water using ultraviolet disinfection has a long history. Air disinfection equipment for hospitals, clinics and purification has adapted to the room. Now, factories, offices and homes that are beginning to use air disinfection equipment.


the principle of air disinfection and water and sanitation. Usually, the lamp can be installed in the air line, located in the front end of the coil, or installed in the shelf fixed to the wall. When air passes through, the microbes were killed in the air and become harmless. The principle of surface disinfection and so on. In the food and beverage industry, products on the conveyor belt is composed of surface disinfection disinfection equipment.


cooling tower disinfection


in order to reduce the cost of the biocide ( Purchase, storage, insurance) And chemical treatment to health hazards, ultraviolet system can be installed in the cooling tower water circulation system in order to have the effect of sterilization. If and filters were used, ultraviolet ray can effectively control the growth of microorganisms in the cooling tower. Although the cooling tower, still need to keep certain biocide concentration in the application of ultraviolet radiation can be greatly reduced its usage.
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