1, Ultraviolet sterilization and disinfection methods
In the water purification equipment, ultraviolet sterilization is a commonly used method of sterilization, sterilization, degradation of TOC and ozone depletion. It can slow down the rate of production of new colonies in the water system and thus affect the formation of biofilm, but the biofilm has been generated is ineffective, only partially effective for the planktonic microorganisms. The effectiveness of UV sterilization is determined by the intensity of UV light, the spectral degree of UV light and the irradiation time. When the wavelength is 253.7mm can get high quality sterilization effect.
2, ozone sterilization disinfection method
Ozone sterilization through oxidation destroys the structure of microbial membranes, which can inactivate bacterial propagules and spores, viruses, fungi, etc., and is also capable of destroying botulinum toxin. In the pharmaceutical water purification equipment system, purified water tanks, a variety of filters, membranes and distribution piping network system will have microbial reproduction and breeding, ozone can effectively remove halide in the water and degrade the biofilm, at the same time there is no residue, it is the current purified water system and high purity water system can be continuous removal of bacteria and viruses in a good way. Ozone sterilization method has become the mainstream pharmaceutical purified water disinfection at home and abroad.
3, pasteurization and disinfection methods
Pasteurization is used for microbial inhibition of the normal operation of water purification equipment. After pasteurization after the purified water equipment system still has a small portion of harmless or beneficial, more heat-resistant bacteria, while the disinfection operation time is relatively long, often using 80 ℃ above the hot water cycle for one or two hours to complete the bus disinfection. The advantage is that it can effectively control the level of microbial contamination in the purified water system at 50CFU/ml, and can control the endotoxin in the purified water equipment at the level of 5EU/ml.