Ozone is an allotrope of oxygen. Its molecular weight contains three oxygen atoms. Its molecular formula is O3. It is a colorless gas at room temperature. It can be decomposed into oxygen by itself, and is usually mixed in the atmosphere in a thin state. Ozone has strong oxidizing characteristics, and is recognized as a broad-spectrum effective bactericide worldwide. Its oxidizing ability is twice as high as that of chlorine, and it can even kill bacteria within a few seconds.
Ozone can effectively disinfect air and water, so the application field of ozone is very wide, involving all fields. Domestic ozone technology has gradually matured, and ozone has gradually become known to people. Because of its strong disinfection ability, it has been applied to various fields instead of conventional disinfection:
1. The field of air purification and disinfection in the living room and room: Ozone has the function of killing bacteria and viruses contained in the air, and has the function of reducing dust. It makes the air fresh and natural, eliminates fatigue, and refreshes the mind.
2. It can be widely used in hotels, hotels, saunas, hospitals, pharmaceuticals, food and other industries to wash clothes, public places, toilets, and production sites.
3. Pesticide degradation: It can be widely used in public dining halls, fruit and vegetable processing plants, food processing plants, etc. to remove harmful substances such as pesticides, fertilizers, and food additives.
4. Water treatment: It can be widely used in anti-algae and sterilization of industrial water, sterilization and disease prevention of aquaculture water, deodorization, decolorization, sterilization and other processes in the process of sewage treatment.
5. Food preservation: It can be widely used in the process of storage, preservation and disinfection of raw materials and finished products in the production and processing of refrigeration plants, food processing plants, livestock slaughter plants and other units.
6. It can be widely used in restaurants and office canteens to sterilize tableware, fruits and vegetables; and to sterilize children's toys and surfaces.
7. Food factories and pharmaceutical factories need to carry out over-flow immersion sterilization on the surface of raw materials and other objects to form sterile raw material surfaces (the packaging container can be sterilized by contacting with high-concentration ozone gas).
8. During the processing of aquatic products—before freezing and packaging, high-concentration ozone water spray sterilization or over-flow immersion sterilization has achieved good control of the hygiene indicators of aquatic products, avoiding excessive residual chlorine caused by the use of chlorides The problem.
9. In the production process of liquid food processing (such as beverages, juices, etc.) and pharmaceutical factories, high-concentration ozone water can be used for soaking and rinsing of pipelines, production equipment and containers, so as to achieve effective sterilization. Bacteria and viruses on the surface of pipelines, equipment and containers are washed and killed, which is very simple and trouble-free. That is, there will be no dead angle, and the discharge and residue of harmful substances caused by the use of other chemical disinfectants will be avoided.
10. Sewage treatment, water purification and disinfection of cooling tower water, swimming pool water, etc.
There are many application industries of ozone, some are used in the air, and some are used in water. It can be used in various places that need to be disinfected. So what is the standard dosage of ozone in the air?
According to the book "Application Collection of Ozone Technology" compiled by Tsinghua University, the safe concentration is classified and extracted according to the safe concentration of air, application concentration, water application concentration, environmental concentration and perceived concentration, so that it can be found in the application. The safe concentration of ozone that people are allowed to contact is not more than 0.2mg/m3.
◆ Hygienic Standards for Ozone Industry: International Ozone Association: 0.1 ppm, contact for 10 hours America: 0.1 ppm, contact for 8 hours Germany, France, Japan: 0.1 ppm CHINA: 0.16mg/m3
◆ Ozone leakage outside the household ozone disinfection cabinet shall not exceed 0.2mg/m3 (referring to 1.5 meters away), and the residual concentration after one cycle of disinfection shall not exceed 0.2mg/m3.
◆ Animal experiments show that the starting point concentration of ozone toxicity is 0.3ppm, while the concentration of ozone in the air that can be smelled by humans is 0.02-0.04ppm. According to the test results of ozone toxicity to lung function, 1.5-2.0ppm is proposed as the allowable concentration of ozone upper limit. The Ministry of Health stipulates that the maximum allowable concentration of ozone is 0.2mg/m3.
Air application concentration:
◆ For air deodorization and sterilization, lower ozone concentration is required, such as 0.5ppm (1mg/m3), while object surface disinfection (killing microorganisms and removing chemical pollution) requires dozens of times higher ozone concentration.
◆ Air application with oxygen concentration between 1mg/m3 and 10mg/m3.
◆ The killing effect is good when the temperature is low and the humidity is high, especially if the relative humidity is less than 45%, ozone has almost no killing effect on suspended microorganisms in the air. It gradually increases at 60% and reaches a maximum at 95%.
◆ Use ozone to sterilize food processing workshops, 0.5~1.0ppm can kill 80% of natural bacteria in the air.
◆ The disinfection of the cold storage requires an ozone concentration of 6-10ppm, and the bacteria killing rate is about 90% and the mold killing rate is about 80% after the shutdown for more than 24 hours.
◆ During fruit storage, 2~3ppm of ozone can be used to inhibit the growth of mold, and the storage period can be doubled.
Therefore, in the process of using ozone to sterilize, it is necessary to control the amount of ozone well, so that the effect of ozone can be well exerted under the condition of environmental protection and safety. With the popularization of ozone application, an ozone Detector, as a kind of Gas Detector, has emerged as the times require, which can facilitate the use of ozone to detect the amount of ozone, ensuring personal safety and dosage regulation. Below is the eye-free portable ozone Detector.
