PDC-150 ultraviolet disinfection equipment 5

UV disinfection www.gyzwx.com: 13833174989 sterilization efficiency, broad-spectrum bactericidal, anti-virus byproducts, and other aspects of the system application costs are much better than chemical disinfection, the technology in terms of water supply and drainage applications will greatly improve water safety . So far, Western countries have been at the sewage treatment plant installed nearly 4,000 large-scale UV disinfection system, more than 10% of the application of this technology manufacturers accounting for the total number of sewage treatment plants. At the same time to have by the end of 2001 more than 2,000 water plant uses ultraviolet disinfection technology, accounting for over 10% of the water plant, and a lot of UV disinfection technological transformation project is under way. UV disinfection is generally divided into three different bands of ultraviolet C (200-280nm), UV-B (280-315nm), UV-C (315-400nm), UV-C germicidal effect among the best. Ultraviolet disinfection and sterilization of chemical disinfectants different, it is not carried out by the reduction reaction of oxidized electron gains and losses, but by ultraviolet photons from radiation-induced photochemical reaction. UV germicidal lamp at 260nm near the highest efficiency, maximum UV output power wavelength UV lamp current production is at 253.7nm, the wavelength of ultraviolet energy accounted for 90 percent of the world's top UV lamp, more than 30% of the total energy, due to the presence of high-intensity, high efficiency of UV C, UV disinfection technology to overcome the low efficiency in the past, a small amount of water disinfection, high cost disadvantage, already has a considerable competitive edge in the field of water disinfection. UV disinfection technology features efficient broad-spectrum bactericidal effect: when the UV intensity is three by ten to the fourth power when UV kill viruses and bacteria in about 0.1 seconds contact time to kill mold spores need 1-8 second, to kill algae need 5-40 seconds, 30-60 seconds, you need two drugs disinfection contact time, ozone disinfection needs 15-30 seconds. Modern UV disinfection equipment can easily achieve sterilization of light intensity (or even higher), so common bacteria, bacteria, fungi, algae, protozoa and even spores can be effectively kill. Drugs of common bacteria, viruses, sterilization has great selectivity, especially for a variety of viruses. Ozone sterilization selective than drugs well, but due to the concentration of chemical disinfection control and can no longer provide a possible large doses of water, so the spores, algae and various protozoa killing effect is poor. The UV technology for the use of chemical disinfection can be difficult to kill pathogens in a few seconds or tens of seconds of 100% kill. UV disinfection of drinking water disinfection byproducts Disinfection byproducts will generate a lot of, there are more than 20 kinds of halogenated organic matter content is strictly controlled in the US EPA's drinking water standards. Halogenated disinfection byproducts problems using technology produced in the disinfection of the more serious, in order to solve this problem, although CIO2 disinfection, sterilization costs but significant increase in Western countries, it is now largely outside the municipal wastewater disinfection using CIO2. The UV disinfection without adding chemicals due to problems without foreign chemical compounds and water interactions. According to current literature, have not found the ultraviolet (especially at 253.7nm place) in the sterilization process will produce a sufficient amount of harmful substances.