The water quality of nature contains microorganisms, including pathogens, bacteria, algae, pathogens, and small animals. The source water containing microorganisms does not undergo sterilization and directly enters the RO reverse osmosis membrane element. Microorganisms will accumulate on the surface of the membrane element under the RO reverse osmosis concentration effect, producing a microbial membrane, which seriously endangers the water production rate and desalination rate of the element, leading to an increase in gas pressure and the appearance of glasses. Moreover, after microbial environmental pollution occurs in membrane components, the actual cleaning effect is not very good. Therefore, for source water containing microorganisms, especially groundwater, sea surface, and sewage, it is necessary to adopt sterilization measures in the preparatory treatment. Common sterilization processes include physical sterilization and organic chemical sterilization.

(1) Physical sterilization mainly uses ultraviolet light for sterilization

What is the actual good sterilization effect of ultraviolet light with a wavelength of 254 nanometers technology. After being exposed to ultraviolet radiation, the kinetic energy of the ultraviolet spectrum is digested and absorbed by the bacterial nucleotides, causing a change in their charm. The production of proteins and enzymes in the bacterial body is hindered, resulting in genetic mutations or death of the microorganisms.

(2) Organic chemical sterilization mainly involves the use of added fungicides to achieve actual sterilization effects

Organic chemical fungicides are divided into oxidizing fungicides and non oxidizing fungicides. Air oxidation fungicides include CI2, CIO2, O3, etc; Non oxidizing fungicides mainly consist of some organic compounds, such as DBNPA, isothiazolinone, indoor formaldehyde, etc.

When applying oxidizing bactericides, it is important to pay attention to the fact that acrylic resin composite bags generally have poor oxidation resistance. Vontron membrane components can withstand a larger permeability of water based on the permanganate index, which is 0 milligrams per liter. Therefore, in the preparation process of adding air oxidizing bactericides, it is also necessary to set a relative processing technology to remove residual reducing agents. Generally, activated carbon filtration or added oxidants are used.

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