The important role of ozone decomposition catalyst in sewage treatment plants

In the urban sewage treatment system, the sewage treatment plant is like a huge and complex "urban metabolic organ", silently processing a steady stream of sewage and ensuring the healthy operation of the urban ecological environment. Among the many treatment processes and technologies of sewage treatment plants, ozone decomposition catalysts are playing an increasingly important and unique role, and can be called invisible "purification guards" in the sewage purification process.
Ozone, as a strong oxidant, has a wide range of applications in the field of sewage treatment. It can react with organic pollutants in sewage with its strong oxidation ability, destroy its chemical structure, decompose complex macromolecular organic matter into simple small molecular substances, and even directly oxidize it into carbon dioxide and water, thereby achieving the purpose of purifying water quality. However, ozone is not perfect in practical applications. On the one hand, the solubility of ozone in water is limited, which makes it impossible for a large amount of ozone to fully contact and react with pollutants, resulting in a waste of ozone; on the other hand, the oxidation reaction of ozone is highly selective, and for some stubborn organic pollutants, it is difficult to achieve efficient removal using ozone alone. In order to solve these problems, ozone decomposition catalysts came into being.
The working principle of ozone decomposition catalysts is exquisite and efficient. When sewage comes into contact with the ozone decomposition catalyst, the active sites on the catalyst surface first play a role, enriching and adsorbing the organic matter in the sewage on its surface. Subsequently, the ozone introduced into the system achieves efficient mass transfer under the action of the catalyst and quickly reaches the vicinity of the adsorbed organic matter. The presence of the catalyst accelerates the decomposition process of ozone, prompting ozone to produce more hydroxyl radicals (・OH) with extremely strong oxidizing properties. The oxidizing property of hydroxyl radicals is much higher than that of ozone molecules themselves, and they can react quickly with almost all organic matter, with extremely fast reaction rates and stronger oxidizing ability. In this series of processes, the ozone decomposition catalyst not only significantly improves the utilization rate of ozone, reduces the amount of ozone added, and reduces the treatment cost, but also greatly enhances the ability to degrade various pollutants in sewage, so that the efficiency and effect of sewage treatment have been qualitatively improved.
In the actual operation of sewage treatment plants, ozone decomposition catalysts play a key role in many aspects. First of all, for industrial wastewater containing a large amount of difficult-to-degrade organic matter, ozone decomposition catalysts can convert these stubborn macromolecular organic matter into small molecular substances that are easy to biodegrade, improve the biodegradability of wastewater, and create good conditions for subsequent biological treatment processes. For example, in the treatment of printing and dyeing wastewater, the molecular structure of dyes in wastewater is complex and difficult to be directly decomposed by microorganisms. Through the action of ozone decomposition catalysts, the conjugated double bonds and other structures of dye molecules are destroyed, the molecules become smaller and easier to be used by microorganisms, which greatly improves the treatment effect of printing and dyeing wastewater. Secondly, ozone decomposition catalysts can effectively remove the chromaticity in sewage, making the treated water clearer and more transparent. This role is particularly important for some industrial production water or landscape water reuse scenarios with strict chromaticity requirements. In addition, ozone decomposition catalysts can also reduce key indicators such as chemical oxygen demand (COD) and total organic carbon (TOC) in sewage, further improve the degree of sewage purification, and ensure that the effluent water quality is stable and meets the discharge standards.
From the perspective of environmental protection and sustainable development, the application of ozone decomposition catalysts in sewage treatment plants has far-reaching significance. On the one hand, it reduces the secondary pollution problems that may occur in traditional sewage treatment processes. Unlike some chemical treatment methods, ozone decomposition catalysts will not introduce new pollutants in the process of promoting ozone oxidation reactions, and the products after ozone reaction are mainly oxygen, which is green and environmentally friendly. On the other hand, by improving the utilization efficiency of ozone and the effect of sewage treatment, ozone decomposition catalysts help to achieve efficient recycling of water resources. After deep treatment, sewage can be reused as reclaimed water in industrial production, urban greening irrigation, road washing and other fields, alleviating the pressure of water shortage and promoting the sustainable development of cities.
Ozone decomposition catalysts have become an indispensable and important part of modern sewage treatment plants due to their unique advantages and high performance. With the increasingly stringent environmental protection requirements and the continuous advancement of sewage treatment technology, the research and development and application of ozone decomposition catalysts will continue to innovate and improve, play a more important role in the future sewage purification field, and contribute more to protecting our water environment and ecological home.