Ultraviolet sterilization water purifiers are a device that uses the sterilization effect of ultraviolet spectrum to purify water quality. The principle is based on the destructive effect of ultraviolet light on the DNA of microorganisms. Ultraviolet light is a type of electromagnetic wave with a wavelength range from about 100 nanometers to 400 nanometers. Among them, ultraviolet light with a wavelength of 200-275 nanometers is harmful to human skin and eyes, but it has a very strong sterilization effect on microorganisms. Ultraviolet sterilization water purifiers make use of this characteristic, destroying the DNA of microorganisms in water through the irradiation of specific wavelengths of ultraviolet light, making them lose the ability to reproduce, and thus achieving the purpose of sterilization.

The sterilization principle of ultraviolet sterilization water purifiers

The main principle of ultraviolet sterilization is to destroy the cell wall or cell membrane of microorganisms in water through ultraviolet light irradiation, causing the loss of enzyme activity inside the cells and thus killing the microorganisms. Ultraviolet light can directly destroy the structure of DNA, especially the destruction of adenine and thymine bases in DNA, which is the most significant. These two bases play a key role in the DNA replication process, and ultraviolet light can cause the breaking of hydrogen bonds between base pairs, making the DNA molecule structure unstable, ultimately leading to DNA damage or breakage, thus preventing the reproduction and survival of microorganisms.

Which microorganisms are effective for ultraviolet sterilization?

Ultraviolet sterilization has a good sterilization effect on a variety of microorganisms, especially effective for the following types of microorganisms:

Bacteria: including Escherichia coli, Staphylococcus aureus, Salmonella, etc.

Viruses: such as influenza virus, adenovirus, poliovirus, etc.

Fungi: such as molds, yeast, etc.

　　Parasites: such as Giardia,Cryptosporidium, etc.

　　It should be noted that the sterilization effect of ultraviolet light on certain microorganisms such as tuberculosis bacteria and certain types of mold spores may be weak because these microorganisms have strong resistance to ultraviolet light. In addition, the sterilization effect of ultraviolet light is also affected by water quality conditions, such as organic matter and suspended particles in the water. These factors may affect the penetration ability of ultraviolet light, thereby affecting the sterilization effect.

Conclusion

Ultraviolet sterilization water purifiers are widely used in fields such as households, medical care, and food processing due to their high efficiency, safety, and absence of chemical residues. However, it is also necessary to pay attention to the reasonable setting of the usage time and intensity of the ultraviolet lamp tubes, as well as regular cleaning and maintenance of the equipment to ensure the best sterilization effect. At the same time, for certain microorganisms that are difficult to be effectively sterilized by ultraviolet light, it is necessary to combine other disinfection methods for comprehensive treatment.