Ultra-pure water machine disinfection experience sharing, novice is worth learning

       The ultra-pure water machine is small in size, exquisite in appearance, easy to maintain, and the preparation of ultra-pure water is faster, more automatic, convenient and efficient. The ultra-pure water produced by it can meet the needs of many laboratory users and has been highly praised since its launch. This equipment is used for the purification of source water and is one of the indispensable general-purpose instruments for all kinds of laboratory scientific research. In order to prevent the breeding of bacteria and microorganisms and ensure the normal operation of the equipment, it is necessary to disinfect and sterilize it regularly. Here are some commonly used disinfection methods.

1. Disinfection

Physical and chemical methods can be used to eliminate pathogenic microorganisms on the transmission medium (physical disinfection method uses physical factors such as radiation and ultrasonic waves to kill microorganisms) to make them harmless. Generally, this method can kill the propagules of pathogenic microorganisms, but cannot destroy the spores and cannot be sterilized.

2. Pasteurization

Pasteurization is the process of heating a liquid to a certain temperature and holding it for a period of time, thereby killing microorganisms. It can be used for periodic disinfection of pretreatment units such as activated carbon in laboratory ultrapure water machines, periodic disinfection of RO/EDI units, and periodic disinfection of storage and distribution pipe network units.

3. Sterilization

Bacterial propagules, spores, fungi, viruses, etc. will affect the effect of water production. It is recommended to use chemical or physical methods to eliminate them (chemical sterilization method is to use chemicals to penetrate into the interior of bacteria, so that the bacterial protein coagulates and denatures, and interferes with bacterial enzymes. activity, inhibit bacterial metabolism and growth or damage the structure of the cell membrane, change its permeability, destroy its physiological function, etc.), so as to achieve the effect of sterility.

4. Ozone sterilization

The ozone sterilization system can be made of stainless steel or PVDF, of which PVDF is relatively economical. The ozone sterilization system is simple, convenient and quick to operate. It destroys the structure of the microbial membrane through oxidation, and destroys bacterial propagules, spores, viruses, fungi, etc.

5. Superheated water sterilization

Superheated water sterilization is the use of high temperature and high pressure superheated water for sterilization. Superheated water can denature and solidify protoplast colloids, proteins, etc., destroy the enzyme system, and kill all microorganisms including bacterial spores, fungal spores, dormant bodies and other high-temperature-resistant individuals.

6. Ultraviolet sterilization

Ultraviolet sterilization can affect the formation of biofilm by slowing down the growth rate of new colonies in the system, so as to achieve the effect of sterilization, degradation of TOC, and elimination of ozone. Ultraviolet sterilization mainly acts on planktonic microorganisms.

The above are several commonly used disinfection methods for ultrapure water machines, hoping to help everyone use the equipment better.