1. Drinking water and medical pure water treatment
The most widely used and successful area of ozone utilization skills is in the treatment of drinking water. Ozone is used for the treatment of drinking water, medical pure water, etc. In addition to its good sterilization effect and no secondary pollution, it also has decolorization, deodorization, removal of iron, manganese, oxidized organic matter, and coagulation aid effects. Some statements indicate that ozone can eliminate all harmful substances in water to the human body.
The international standard for drinking water is zero total bacterial count and coliform group. Western countries such as Europe and America comply with this standard, so ozone water treatment products from water supply companies are widely used. Due to its development and relatively backward economy, China's national hygiene standards for drinking water stipulate a total bacterial count of 100 and a coliform group of 3. Most of the equipment is disinfected using bleach, chlorine dioxide, and sodium hypochlorite, which have been promoted in recent years. Because chlorine disinfection can cause secondary pollution from chlorine derivatives, among which trihalomethanes are direct carcinogens, they have been gradually screened in drinking water treatment in Europe and America.
2. Secondary water supply for buildings
In 1996, the Ministry of Health of China issued a document requiring the installation of disinfection equipment for secondary water supply. Some units' self owned wells also need to be used only when the water quality is qualified. Currently, disinfection and treatment products for secondary water supply can only be selected from chlorine dioxide, sodium hypochlorite, and ozone generation equipment. Ozone water treatment has strong competitive advantages and should be a mature market. In recent years, mineral water, purified water, and bottled water have become essential commodities for ozone technology, and it is difficult to qualify without ozone equipment.
3. Swimming pool water treatment
The ozonation technology has been used in swimming pool water treatment for a long time. It is widely used in Europe, America and other countries. The swimming pool in international competitions almost uses ozone technology for treatment. China's swimming water specification requires 1000 bacteria, 100 coliform bacteria, and 5 turbidity. At present, the first choice is to use chlorine, bleaching powder, copper sulfate and other killing methods. Once the water quality is qualified, it will cause secondary pollution, which will make the water quality dazzling and affect the skin and other consequences. In particular, the potential threat in the use of liquid chlorine is very large. Once leaked, it will cause a large area of toxic pollution, which makes people frightened in the use. Ozone technology, when the water quality is qualified, completely eliminates the above disadvantages. Ozone treated water can also kill bacteria for beauty purposes. What's more economical is that it reduces or eliminates drug consumption during use, reduces costs, and extends the shelf life of water quality, which is a significant cost saving.
The ozone treatment technology for swimming pool water is fundamentally the same as that for drinking water treatment, and its widespread use requires improvement in economic and cognitive levels. The demand is that after using ozone, indoor swimming pools do not require medication assistance, and outdoor swimming pools may cause some algae to grow under high temperatures.
4. Treatment of circulating cooling water
Circulating cooling water is widely used in industries such as power plants, fertilizer plants, chemical plants, etc. The central air conditioning equipment that has emerged in recent years also relies on circulating water. In recent years, due to the discovery of a highly harmful Gram negative pathogen in circulating cooling water, people have paid increasing attention to the treatment technology of circulating cooling water. In the late 1970s, the United States conducted a lot of research on ozone treatment of circulating cooling water, which confirmed that ozone has many advantages such as corrosion inhibition, scale inhibition, sterilization, algae killing, water conservation, and no pollution. Moreover, the treatment cost is lower than traditional methods, so ozone treatment of circulating cooling water has a broad prospect.
5. Industrial wastewater treatment
Ozone is widely used in industrial wastewater treatment, including the treatment of phenol, cyanide, and printing and dyeing wastewater. Ozone can rapidly differentiate cyanide in cyanide complex salts, with a two-step reaction. Firstly, the highly toxic CN - is oxidized to CNO -, and then further oxidized to CO2 and N2, which can significantly reduce the toxicity of toxic wastewater. The degradation rate of phenol by ozone in the treatment of phenol containing wastewater is related to the amount and timing of ozone addition, and the higher the pH value in the reaction, the faster the reaction and the smaller the ozone consumption. Ozone has the ability to decolorize all dye wastewater except for dispersed dyes. It can damage the hair color or color assisting genes that are correctly identified, achieving decolorization. When the COD is 1100-1800mg/L, under specific conditions, ozone can achieve a decolorization rate of 99% within 15 minutes, with a decrease of nearly 90% in COD. Due to the varying composition of industrial wastewater, when calculating the amount of ozone added, data is usually obtained through experiments.

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