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1. Differences between ozone disinfection and pasteurization: In addition to advantages such as simple operation, stable water temperature, short disinfection time, and the ability to break down biofilms, ozone disinfection systems also offer a wide range of options when it comes to pipe materials. Ozone sterilization systems can be constructed using stainless steel or PVDF material; those built with PVDF material can effectively reduce investment costs. 2. Disinfection: Using physical or chemical methods to kill or eliminate pathogenic microorganisms on transmission vectors, rendering them harmless. It generally refers to the destruction of the reproductive forms of pathogenic microorganisms, but it cannot destroy their spores; therefore, disinfection is incomplete and cannot replace sterilization. 3. Sterilization: The elimination of all living microorganisms using chemical or physical methods, including all bacterial reproductions, spores, fungi, and viruses, thereby achieving a sterile state. 4. Pasteurization: It refers to the process of heating a liquid to a certain temperature for a specified period of time in order to kill microorganisms that could cause diseases, lead to spoilage, or facilitate unwanted fermentation. Pasteurization has two main functions: ① It is used for the periodic disinfection of pre-treatment units such as activated carbon in ultra-pure water systems, the periodic disinfection of RO/EDI units, as well as the periodic disinfection of storage and distribution network units. 5. Ultraviolet sterilization: Ultraviolet light affects the formation of biofilms by slowing down the growth rate of new colonies in the system, but this is only effective against planktonic microorganisms. Ultraviolet light primarily has three functions: sterilization, degradation of TOC, and destruction of ozone.