Ozone (O3) is a strong oxidant, disinfectant, fine preparation, and catalyst. Since the beginning of this century, the disinfection of drinking water with ozone in France has become more and more widely used.
Application fields of ozone: drinking water treatment (bottled) pipes, drinking water treatment in swimming pools and saunas. Food, pharmaceutical, cosmetics and other industries, water treatment and disinfection of the surface of space appliances. Industrial production water, reclaimed water, sewage ozone sterilization, decolorization, COD reduction treatment. Preparation of high-concentration ozone water, rinsing and spraying of raw and auxiliary materials and clean vegetables and fruits, to achieve the purpose of surface disinfection and sterilization. Other industries that require water treatment and indoor air sterilization and disinfection, and eliminate odors, mildew and freshness can be treated with ozone disinfection and sterilization machines.
The characteristics of ozone sterilization are as follows:
1. Efficient And Fast
Ozone can kill 100% of dead bacteria, yeast and Aspergillus niger in just 1 minute. Ozone water sterilization is different from general sterilization and disinfectants, such as hypochlorous acid (HOC12), chlorine dioxide (CI02) sterilization and disinfection is progressive, cumulative, ozone water sterilization is rapid When the ozone concentration exceeds the threshold, disinfection and sterilization will occur instantly. For example, when the ozone concentration in clean water reaches 0.4-0.5ppm, bacteria can be killed within 0.5-5min.
2, Safety And Reliability
The decomposition product of ozone is oxygen, which does not produce residual pollution. On the other hand, as a gas, it has good diffusivity and uniform concentration. It is more practical than ultraviolet germicidal lamps, especially in high humidity environments, and it is easy to operate, safe and reliable. Ozone has no effect on the human body.
3. Wide application range in the food industry
In many foreign countries, ozone sterilization methods have been widely used in various aspects of food processing. Ozone sterilization has a unique role in many aspects of the food industry. Because ozone has a good killing effect on yeast, it is of great significance in the adoption of new food packaging. Recently, due to the popularity of gas replacement packaging, vacuum packaging, sealed deoxidizer packaging, and sealed powder alcohol packaging, a new deterioration phenomenon has occurred-the problem of food deterioration caused by yeast, the most representative of which is the production of acetic acid Ethylene deteriorates. Ozone has a good killing effect on yeasts. Therefore, filling ozone to kill yeasts when adopting the above new packaging has become an important method to solve this problem. Ozone has a special role that cannot be solved by other sterilization methods. Therefore, when processing raw cut noodles, buns, bean paste, pickles, tofu and other packaged foods, workshop sterilization, packaging with ozone sterilization, and raw material sterilization have become very effective food hygiene measures. It has also achieved satisfactory results in sterilization and sterilization of container pipes and equipment used in the production process of mineral water, soft drinks, fruit juices, etc., as well as glass bottles and plastic barrels containing products.
Swimming pool water: Disinfection and sterilization, decompose humus in water, improve water quality, make the water appear beautiful blue, stabilize pH value, decompose organic matter in water, eliminate chloride side effects, effectively prevent the discomfort of eyes caused by chlorine treatment, irritation of skin and The pungent odor of the air above the pool reduces the use of chemical reagents.
Medical sewage: efficient and rapid disinfection and sterilization, killing various microorganisms, removing sewage, smell, chlorocyanide and other pollutants, increasing dissolved oxygen in water to improve water quality, decomposing difficult-to-biodegradable organic substances and three substances, improving sewage Biochemical, easy to decompose, will not cause secondary pollution.
Drinking water: In addition to sterilization and disinfection, it also has decolorization, deodorization, removal of iron, manganese, residual chlorine, and oxidative decomposition of organic matter, control algae, improve water quality, taste, environmental protection and no residue, and can avoid secondary pollution caused by chlorine dioxide. Pollution.
Industrial wastewater: Depending on the industry, it quickly decomposes and deodorizes organic fuels such as cyan and phenol in wastewater, removes harmful substances, and reduces COD.
Factors affecting ozone sterilization:
The effect of ozone sterilization is mainly affected by its concentration, microbial species, action time, temperature, pH value, physical and chemical properties of water, and impurities.
1, Ozone has different killing effects on various microorganisms. Experiments have shown that ozone has a strong killing effect on human and animal pathogens and viruses such as Staphylococcus aureus, E. coli, hepatitis B virus, and salmonella, even if it has a strong tolerance to chemical disinfectants. Mold also has strong killing power;
2,Temperature and humidity also affect its sterilization effect. Generally, the sterilization effect is good with low temperature and high humidity. The experiment proves that when the relative humidity of the environment is less than 45%, the ozone has almost no killing effect on suspended solids in the air. At the same temperature, when the relative humidity exceeds 60%, the killing effect gradually increases. When the relative humidity is 90%, To achieve the best sterilization effect;
3, The concentration of ozone also affects its sterilization ability. The concentration is below 0.2 mg/L, which has almost no killing effect.
Comparison of water quality before and after ozone treatment
Ozone sterilization has many unique advantages:
● High diffusivity
● Strong sterilization ability
● Broad spectrum
● Easily available raw materials
● Environmental protection
According to its principles and characteristics, other applications for the region:
Disinfection of containers
Disinfection of water