Ozone concentration and effect Safe concentration â—ŽThe ozone concentration that people are allowed to contact is not more than 0.2mg/m3. International Ozone Association: 0.1 ppm, contact for 10 hours United States: 0.1 ppm, 8 hours of exposure Germany, France, Japan: 0.1 ppm China: 0.15ppm â—Ž The amount of ozone leakage outside the household ozone disinfection cabinet must not exceed 0.2 mg/m3 (referring to 1.5 meters), and the residual concentration after one cycle of disinfection should not exceed 0.2 mg/m3. Air application concentration â—Ž As air deodorization and sterilization, the ozone concentration is required to be low, such as 0.5ppm (1mg/m3), while the surface disinfection of the article (killing microorganisms and removing chemical pollution) requires increasing the ozone concentration by tens of times. Application concentration in water â—Ž Ozone solubility in water applications is between 0.1mg/L and 10mg/L. The low value is the minimum concentration required for water disinfection and purification, and the high value is the concentration value that can be achieved by the “ozone water disinfectantâ€. Author: Xia Jin Huikang Ozone Generator Factory Website: http://
Pesticide generalized definition is used to prevent, eliminate or control hazards of agriculture, forestry disease, insect, grass and other harmful organisms and purposefully regulate, control, influence plant and harmful biological metabolism, growth, development, reproduction process of chemical synthesis or other natural products derived from biological, and application of biotechnology to produce a substance or a mixture of several substances and their preparations.In the narrow sense refers to the agricultural production, to protect and promote the growth of plants and crops, the use of insecticidal, sterilization, destroy harmful animals (or weeds) to a category of drugs.Especially used in pest control and regulating plant growth in agriculture, weeding, etc.
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â—ŽOzone industrial hygiene standards:
â—Ž animal experiments show that the starting point of ozone toxicity concentration is 0.3ppm, and people can smell the concentration of ozone in the air is 0.02 ~ 0.04ppm, according to the test results of ozone on pulmonary function toxicity, put forward 1.5 ~ 2.0ppm is the allowable concentration of ozone The upper limit. The Ministry of Health specifies that the maximum allowable concentration of ozone is 0.2mg/m3.
â—Ž air application oxygen concentration between 1mg/m3 ~ 10mg/m3.
â—Ž Low temperature, high humidity, good killing effect, especially humidity, relative humidity less than 45%, ozone has almost no killing effect on airborne microorganisms. It gradually increased at 60% and reached a maximum at 95%.
â—Ž Using ozone to disinfect the food processing plant, 0.5 to 1.0 ppm can kill 80% of the natural bacteria in the air.
â—Ž Cold storage disinfection requires ozone concentration of 6 to 10 ppm. After the shutdown, storage of bacteria for more than 24 hours is about 90%, and the mold kill rate is about 80%.
â—Ž During fruit storage, 2~3ppm of ozone can be used to inhibit the growth of mould and the storage period can be doubled.
â—ŽOzone deuteration in tap water, the international common standard is a solubility value of 0.4 mg/L, which is maintained for 4 minutes, that is, the CT value is 1.6.
â—Ž remaining ozone concentration in the water is maintained at 0.1 to 0.5 mg/L for 5 to 10 minutes for disinfection purposes.
â—Ž Ozone water disinfection and sterilization is rapid and disinfection occurs instantaneously. Once the ozone concentration in clear water is reached, the bacteria are killed within 0.5 to 1 minute. At a concentration of 4 mg/L, the inactivation rate of HBV within 1 minute is 100%.
◎Herbold reported that at 20°C, when the concentration of ozone in the water reaches 0.43 mg/L, E. coli can be killed by 100%, and only 0.36 mg/L can be killed at 10°C.
â—Ž When the ozone concentration is 0.25 to 38 mg/L, it only takes a few seconds or several minutes to completely inactivate the hepatitis A virus (HAV).
â—ŽWhen the ozone water solubility in mineral water is 0.4-0.5mg/L, it can meet the requirements of sterilization and quality assurance. A reasonable amount of ozone is 1.5 to 2.0 mg/L.
â—Ž bottled water treatment should reach 0.3 ~ 0.5mg / L of ozone solubility value, requiring ozone dosing should meet 1m3 water 2gO3 generation. According to practical experience, when the ozone concentration is higher than 8 mg/L, the concentration is easily reached.
According to the sources of raw materials can be divided into organic chemicals, inorganic chemicals, pesticides, microbial pesticide plant.In addition, there are insects.According to the processing formulations can be divided into powder, wettable powder, soluble powder, cream, butter, concentrated emulsion, cream, paste, gel agent, smoke agent, fumigants, smoke agent, agent, granulation and particles, etc.Most is liquid or solid, is a gas.