Pure water refers to purified water, which is generally sourced from urban tap water. Through multi-layer filtration, it can remove harmful substances such as microorganisms, but also remove minerals such as fluorine, potassium, calcium, magnesium and other minerals needed by human body.

1、 Ozone sterilization ultra-pure water treatment

The disinfection principle of ozone (O3) is that under normal temperature and pressure, the molecular structure of ozone is unstable, and it quickly decomposes into oxygen (O2) and single oxygen atom (O); The latter has a strong activity and has a strong oxidizing effect on bacteria. When it is killed, the excess oxygen atoms will automatically recombine into ordinary oxygen atoms (O2). There is no toxic residue, so it is called non-polluting disinfectant. It not only has a strong killing ability on various bacteria (including hepatitis virus, Escherichia coli, Pseudomonas aeruginosa and miscellaneous bacteria), but also is very effective in killing mycotoxins.  

1. The sterilization mechanism and process of ozone belong to biochemical process, which oxidizes and decomposes the glucose oxidase necessary for the oxidation of glucose in bacteria.  

2. Directly interact with bacteria and viruses, destroy their organelles and RNA, decompose DNA, RNA, proteins, lipids, polysaccharides and other macromolecular polymers, and destroy the material metabolism production and reproduction process of bacteria.  

3. Penetrate the cell membrane tissue, invade the cell membrane and act on the outer membrane lipoproteins and the internal lipopolysaccharide, causing the cell to undergo permeability distortion, leading to cell lysis and death. In addition, the genetic genes, parasitic strains, parasitic virus particles, bacteriophages, mycoplasma and pyrogen (bacterial virus metabolites, endotoxin) in the dead bacteria will be dissolved and denatured.

2、 Activated carbon adsorption pure water treatment process

Activated carbon mainly removes organic impurities such as color, odor, residual chlorine, residual disinfectants, etc. in water by adsorption and filtration.

3、 Membrane microporous filtration (MF) pure water treatment process

Membrane microporous filtration includes three forms: deep filtration, screen filtration and surface filtration.  

Deep filtration is a matrix made of woven fibers or compressed materials, which uses adsorption or capture to retain particles, such as commonly used multi-media filtration or sand filtration; Deep filtration is a relatively economic way, which can remove more than 98% of suspended solids while protecting the downstream purification unit from being blocked, so it is usually used as pretreatment.  

The surface filtration is a multi-layer structure. When the solution passes through the filter membrane, particles with larger pores than the inside of the filter membrane will be left behind and mainly accumulate on the surface of the filter membrane, such as the 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.  

The screen filter membrane is basically a consistent structure, like a sieve, which leaves particles larger than the pore size on the surface (the pore size of this filter membrane is very accurate), such as the point-of-use security filter used at the end of the ultra-pure water machine; Screen filtration microporous filtration is generally placed at the final point of use in the purification system to remove the final residual traces of resin chips, carbon chips, colloids and microorganisms.

4、 Ion exchange (IX) pure water treatment process

The principle of the ion exchange method is to exchange the anions and cations of inorganic salts in water, such as calcium ion Ca2+, magnesium ion Mg2+, sulfate SO42 -, nitrate NO3 -, etc. with the ion exchange resin to exchange the anions and cations in water with the anions and cations in the resin, so as to purify the water.

5、 Reverse osmosis (RO) pure water treatment process

It is a material separation process of extracting pure water from water bodies containing various inorganic substances, organic substances and microorganisms, driven by pressure and using the selectivity of reverse osmosis membrane that can only penetrate water but not solute. The pore size of the reverse osmosis membrane is less than 10 angstrom (1 angstrom is equal to 10-10 meters), which has a strong screening effect. Its desalting rate is up to 99%, and the sterilization rate is more than 99.5%. It can remove inorganic salts, sugars, amino acids, bacteria, viruses and other impurities in water. If the raw water quality and produced water quality are taken as the benchmark, after proper design, RO is the most economical and effective method to purify tap water, and also the best pretreatment method for ultra-pure water system.

6、 Ultrafiltration (UF) pure water treatment process

Microporous membrane is used to remove particles according to the size of its filtration pore size, while ultrafiltration (UF) membrane is like a molecular sieve, which allows the solution to pass through extremely fine pores based on the size to achieve the purpose of separating molecules of different sizes in the solution.  

Ultrafiltration membrane is a strong, thin and selective permeable membrane, and its filtration pore size is generally considered to be about 0.01 μ m. It can intercept molecules of a certain size or more, including colloid, microorganism and heat source. Smaller molecules, such as water and ions, can pass through the filter membrane.

7、 Ultra-pure water treatment process with ultraviolet (UV) and ozone sterilization

The 254nm/185nm ultraviolet light emitted by the ultraviolet lamp can effectively kill bacteria and degrade organic substances.

8、 EDI pure water treatment process

A new method of deionized water treatment. Also known as continuous electric desalting technology, the EDI device clamps the ion exchange resin between the anion/cation exchange membrane to form an EDI unit. This method does not need to regenerate the resin with acid and alkali, and has good environmental protection.