Application of ozone in the medical industry

(1) Water disinfection:

Due to the instability of ozone in water, it produces hydroxyl (OH) and monatomic oxygen with strong oxidation ability (stronger than monatomic oxygen) after decomposition, which can effectively kill various bacteria and viruses in water. Abroad, ozone is regarded as the most ideal water disinfection and purification agent, and many large water plants generally use ozone to treat drinking water.

Chlorinated water can produce the carcinogenic poison trichloromethane. If the amount of chlorinated water is increased, the amount of trichloromethane will also increase. With the in-depth research on the toxicity of carcinogens, the World Water Quality Association and the World Health Organization have not advocated the use of chlorinated water for drinking water disinfection. Ozone for drinking water disinfection has the following advantages:

Strong oxidation capacity, high bactericidal efficiency, fast bactericidal speed, the efficiency of ozone killing microorganisms in water is 600-3000 times that of chlorine, which can kill all bacteria, viruses, spores, sporozoa in water, and can also kill algae.

After the action of ozone in water, the product is non-toxic and harmless oxygen, and ozone itself has no permanent residue, and can also increase dissolved oxygen in water;

It has the effect of removing color and deodorizing, reducing the turbidity of water;

It can oxidize and decompose iron, manganese, silver, cobalt, suspended particles, organic pesticides and detergents in water, greatly improving water quality.

The dosage of ozone in water treatment should be designed according to the physical and chemical properties of water, the degree of pollution, and the contact time. For the disinfection of domestic water and drinking water, 0.1-1mg/L can be added, the ozone amount of general water 0.5-1.5mg/L, contact for 5-10 minutes, the remaining ozone concentration of 0.1-0.5mg/L in the water is maintained.

Ozone is also widely used in sewage treatment, due to the strong bactericidal ability of ozone, many foreign hospitals use ozone to treat sewage, and achieved satisfactory results, the test proves that when the hospital discharge sewage contains 106-108 bacteria /L, the ozone concentration of 10-20mg/L effect 10-15 minutes, The killing rate of bacterial propagules reached 99.999%-100%, adding 25-30mg/L for 15 minutes, the killing rate of spores could also reach more than 99.999%.

(2) Air disinfection:

Ozone in the air can be diffused to all indoor items around and every corner of the space, good dispersion, uniform concentration, leaving no dead corners, so it has more advantages than ultraviolet radiation, and ultraviolet radiation sterilization, only in the irradiation of the position to reach the irradiation intensity standard in order to have sterilization effect. Moreover, the bacteriolytic disinfection mechanism of ozone can effectively kill various microorganisms in the air. Ozone below the safe allowable concentration (0.2mg/M3) has a good killing effect on the general bacterial propagules. In the experiment, 30 mg/M3 concentration ozone was applied for 15 minutes, and the killing rate of natural bacteria in the sample hospital ward was ≥ 92.7%. For Staphylococcus aureus in the aerosol, 0.12 mg/M3 ozone was applied for 30 minutes, and the killing rate reached more than 99.9%. The killing rate of Bacillus subtilis black varieties was ≥ 99% when treated with 5.67 mg/M3 ozone for 60 minutes.

The main advantages of using gaseous ozone disinfection are: the final decomposition of ozone is oxygen, no residue, no public harm to the environment; There will be no residue on the sterilized items, such as utensils, tableware, hospitals, etc., and the physical and chemical properties of the original items will be less affected; Compared with other disinfection methods, such as ultraviolet light, pharmaceutical fumigation, etc., the operation cost is smaller; Wide range of application, no special restrictions.