Pure water treatment process

I. Ozone sterilization ultrapure water treatment
　　Ozone The disinfection principle of ozone (O3) is that ozone is unstable in its molecular structure at normal temperature and pressure, and quickly decomposes into oxygen (O2) and a single oxygen atom (O); the latter has a strong activity and a strong oxidizing effect on bacteria, killing them. The excess oxygen atoms will recombine into ordinary oxygen atoms (O2), leaving no toxic residue. Therefore, it is called a pollution-free disinfectant. It not only has a strong killing ability against various bacteria (including hepatitis viruses, Escherichia coli, green-concentrated bacteria, and miscellaneous bacteria), but also is very effective in killing mycin.
　　1. The sterilization mechanism and process of ozone belong to biochemical processes, oxidizing and decomposing the glucose oxidase necessary for bacteria to oxidize glucose.
　　2. Directly interact with bacteria and viruses, destroying their organelles and ribonucleic acid, decomposing macromolecular polymers such as DNA, RNA, proteins, lipids, and polysaccharides, and destroying the material metabolism production and reproduction process of bacteria.
　　3. Penetrate the cell membrane tissue, invade the cell membrane, act on the outer membrane lipoprotein and the internal lipopolysaccharide, causing cell permeability distortion, leading to cell lysis and death. And dissolve and denature and kill the genetic genes, parasitic species, parasitic virus particles, bacteriophages, branchymycetes, and pyrogens (bacterial virus metabolic products, endotoxins) in the dead bacteria.

II. Activated carbon adsorption pure water treatment process
　　Activated carbon relies on adsorption and filtration to mainly remove organic impurities such as discoloration, odor, residual chlorine, and residual disinfectants in water.

III. Microporous membrane filtration (MF) pure water treatment process
　　Membrane microfiltration methods include three forms: depth filtration, screen filtration, and surface filtration.  
　　Depth filtration uses a matrix made of woven fibers or compressed materials to retain particles using inert adsorption or capture methods, such as commonly used multimedium filtration or sand filtration. ; Depth filtration is a relatively economical method that can remove more than 98% of suspended solids, while protecting downstream purification units from clogging, so it is usually used as pretreatment.
　　Surface filtration is a multi-layer structure. When the solution passes through the filter membrane, particles larger than the pores inside the filter membrane will be retained and mainly accumulate on the surface of the filter membrane, such as commonly used PP fiber filtration. Surface filtration can remove more than 99.9% of suspended solids, so it can also be used for pretreatment or clarification.
　　Screen filter membranes basically have a consistent structure, like a sieve, leaving particles larger than the pore size on the surface. (The pore size of this filter membrane is very), such as the point-of-use security filter used at the end of the ultrapure water machine; screen filtration microfiltration is generally placed at the end-use point in the purification system to remove residual trace resin pieces, carbon chips, colloids, and microorganisms.

IV. Ion exchange (IX) pure water treatment process
　　The principle of ion exchange is to exchange the inorganic salt anions and cations in water, such as calcium ions Ca2+, magnesium ions Mg2+, sulfate SO42-, nitrate NO3-, etc., with ion exchange resin, so that the anions and cations in the water are exchanged with the anions and cations in the resin, thereby purifying the water.

V. Reverse osmosis (RO) pure water treatment process
　　It uses pressure as the driving force, using the reverse osmosis membrane's selectivity that only allows water to pass through but not solutes, to extract pure water from water bodies containing various inorganic substances, organic substances, and microorganisms. The pore size of the reverse osmosis membrane is less than 10 angstroms (1 angstrom is equal to 10-10 meters), with a strong sieving effect, its desalination rate is as high as 99%, and the sterilization rate is greater than 99.5%. It can remove inorganic salts, sugars, amino acids, bacteria, viruses and other impurities in water. If the raw water quality and product water quality are used as the basis, after appropriate design, RO is an economical and effective method for purifying tap water, and it is also a good pretreatment method for ultrapure water systems.

VI. Ultrafiltration (UF) pure water treatment process
　　Microporous membranes remove particles based on their pore size, while ultrafiltration (UF) membranes act like a molecular sieve, using size as a basis to allow the solution to pass through extremely fine pores to achieve the purpose of separating different sized molecules in the solution.
　　Ultrafiltration membranes are strong, thin, and selectively permeable membranes, generally considered to have a pore size of approximately 0.01μm, which can retain molecules of a certain size or larger, including: colloids, microorganisms, and pyrogens. Smaller molecules, such as water and ions, can pass through the filter membrane.

VII. Ultraviolet (UV), ozone sterilization ultrapure water treatment process
　　Using the ultraviolet light emitted by 254nm/185nm can effectively kill bacteria and degrade organic matter.

VIII. EDI pure water treatment process
　　A new method for treating deionized water. Also known as continuous electrodialysis technology, The EDI device fills the ion exchange resin between the anion/cation exchange membranes to form an EDI unit. This method does not require the use of acid and alkali to regenerate the resin, and is environmentally friendly.