I. Introduction

With the rapid advancement of industrialization and urbanization, sewage discharge continues to rise, and sewage treatment has become the core issue in the field of environmental protection. Faced with the increasingly complex composition of sewage, traditional sewage treatment methods are gradually exposed to shortcomings. In this context, ozone advanced oxidation technology, as an efficient and environmentally friendly new sewage treatment technology, has attracted much attention. This paper will deeply analyze the practical application of advanced ozone oxidation technology in sewage treatment, and discuss its market prospect.

2. Principle of advanced ozone oxidation technology

Ozone (O) is a strong oxidant, and its REDOX potential is second only to fluorine, which has a strong oxidation activity. Advanced ozone oxidation technology mainly relies on the hydroxyl radical (· OH) produced by ozone under specific conditions to decompose organic pollutants in sewage. · The oxidation capacity of OH is excellent, the reaction rate is extremely fast, and almost all organic pollutants can react with it to degrade it into carbon dioxide, water and small molecule inorganic substances.

Common advanced ozone oxidation technologies include ozone/hydrogen peroxide (O /H₂O₂), ozone/ultraviolet (O /UV), and ozone/catalyst (O/catalyst) combination processes. In O /H₂O₂ process, the addition of hydrogen peroxide causes ozone to decompose and produce more · OH, which in turn strengthens the oxidation effect. In ₃/UV process, ultraviolet light contributes to ozonolysis and increases the formation efficiency of · OH. In contrast, the O-₃ / catalyst process reduces the activation energy of ozonolution and accelerates the formation of · OH by adding a catalyst.

Third, technical advantages

The high concentration ozone generator developed by Shandong Zhiwei breaks through the bottleneck of the industry standard, and combines high frequency discharge technology to make the ozone concentration reach 180-300mg/l, which can be applied to the semiconductor industry and the advanced oxidation process requiring high concentration.

1. High efficiency: The technology can rapidly degrade a variety of difficult to degrade organic pollutants such as pesticides, dyes, antibiotics, and greatly improve the efficiency of sewage treatment.

2. Environmental protection: Ozone is converted into oxygen after decomposition, without secondary pollution, and there is no need to add a large number of chemical agents in the reaction process.

3. Non-selective: · OH has non-selective oxidation characteristics, which can effectively treat sewage with complex components.

4. Disinfection and sterilization: ozone itself has a strong disinfection and sterilization ability, which can achieve disinfection function while purifying sewage.

5. Compact equipment: Compared with some traditional processing processes, the advanced ozone oxidation equipment covers a small area and is easy to integrate and install.

4. Application cases

1. Printing and dyeing wastewater treatment: Foshan Chemical Industrial Park printing and dyeing plant uses ozone/hydrogen peroxide combined process to treat printing and dyeing wastewater. The wastewater is rich in a large number of dyes and auxiliaries, the composition is complex and the chroma is high. After the process treatment, the chroma removal rate of wastewater exceeds 95%, the chemical oxygen demand (COD) is reduced by 70%, and the effluent quality meets the national discharge standard.

2. Pharmaceutical wastewater treatment: The wastewater of a pharmaceutical enterprise contains a variety of antibiotics and difficult to degrade organic matter. After treatment by ozone/catalyst process, the removal rates of antibiotics and COD in wastewater reached 85% and 60% respectively under optimized reaction conditions, which laid a good foundation for subsequent biochemical treatment.

3. Landfill leachate treatment: The leachate of a landfill contains high concentrations of organic matter, ammonia nitrogen and heavy metals. The removal rate of COD in the leachate was more than 50%, and the removal rate of ammonia nitrogen was also significantly increased, which effectively improved the water quality of the leachate.

5. Market status

1. Technological development: In recent years, advanced ozone oxidation technology has continued to innovate, and new catalyst research and development and process optimization have become the focus of research. Many enterprises and scientific research institutions are committed to developing efficient and stable catalysts to improve ozone decomposition efficiency and oxidation performance, and reduce operating costs.

2. Market demand: With the increasingly stringent environmental standards, industrial enterprises and municipal sewage treatment plants have an increasing demand for efficient sewage treatment technology. Especially electronics, pharmaceuticals, food and beverage industries with high water quality requirements, advanced ozone oxidation technology is favored because of its excellent treatment effect.

3. Competition pattern: At present, the market for advanced ozone oxidation technology is highly competitive. Shandong Zhiwei is in a leading position in the field of ozone generators through technology research and development and equipment innovation.

6. Market prospect forecast

1. Market size growth: It is expected that in the next few years, under the dual role of the continuous promotion of environmental protection policies and the growing demand for sewage treatment, the market size of advanced ozone oxidation technology will expand steadily. According to market research institutions, the next five years, the global ozone advanced oxidation technology market is expected to grow at an annual rate of 8%-10%.

2. Application field expansion: In addition to the traditional industrial wastewater and municipal sewage treatment fields, advanced ozone oxidation technology has broad prospects in the deep treatment of drinking water, seawater desalination pretreatment, sludge reduction and other fields. For example, in the advanced treatment of drinking water, the technology can effectively remove trace organic pollutants and disinfection byproduct precursors in the water to improve the quality of drinking water.

3. Technological innovation-driven: Continuous technological innovation will be the key driving force to promote the development of advanced ozone oxidation technology market. In the future, with the continuous progress of new catalysts, reactor design and automated control technology, the treatment efficiency of advanced ozone oxidation technology will be further improved, and the operating cost will be reduced, thus enhancing its market competitiveness.

4. Policy support: Governments of various countries have attached increasing importance to environmental protection, and have introduced relevant policies to encourage and support the research and development and application of efficient sewage treatment technologies. Policy support will provide a strong guarantee for the market development of advanced ozone oxidation technology.

Vii. Conclusion

As an efficient and environmentally friendly wastewater treatment technology, advanced ozone oxidation technology has significant advantages in treating refractory organic pollutants. Through a number of practical application cases, it can be seen that the technology has achieved good results in printing and dyeing, pharmaceutical, landfill leachate and other wastewater treatment. At present, the market of advanced ozone oxidation technology presents a situation of continuous technological innovation, continuous growth of demand, and fierce competition. Looking forward to the future, with the expansion of market size, application field expansion, technological innovation drive and policy support, advanced ozone oxidation technology will have broad prospects in the field of sewage treatment, and is expected to become one of the mainstream technologies in the sewage treatment industry.