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This post was last edited by 654262293 on 2022-2-2 at 15:25. Xintian Coal Chemical Industry: Process optimization enhances water quality purification. Author/Source: Zhejiang Energy Xintian Coal Chemical Industry. Date: 2022-01-31. Clicks: 35. “This bottle shows the color of the water in the system before ozone treatment was applied, while this bottle shows the color of the water after ozone catalytic oxidation was used.” ”The members of the water treatment operation team said excitedly, holding two bottles of water. http://img.yf116.cn/image/img/20220131/80522885287.jpg Recently, the ozone catalytic oxidation process for wastewater treatment was successfully put into operation. The successful operation of this process opens up new avenues for improving the water quality in the purification systems of wastewater treatment facilities, and it also lays a solid foundation for the continuous and stable operation of the \"zero discharge\" process for the wastewater generated by Xintian Coal Chemical Industry. In terms of process technology, the wastewater treatment system at Xintian Coal Chemical Industry has been equipped with an ozone catalytic oxidation unit; this unit uses an ozone generator to produce ozone at a concentration of 150 grams per cubic meter, which then undergoes an oxidation reaction directly with the wastewater. Taking advantage of ozone’s strong oxidizing properties as well as its ability to remove odors and colors, ozone generates hydroxyl radicals in wastewater, which decompose some organic substances into minerals. This process helps to remove organic pollutants from water, reduce its turbidity and color, and thereby purify the water quality in the system. During operation, the product water from the submerged ultrafiltration is pumped by a lift pump to the ozone catalytic oxidation unit. The wastewater entering the ozone catalytic oxidation device comes into contact with ozone introduced via a jetter, and a catalytic oxidation reaction takes place under the action of the catalyst, effectively degrading the organic substances in the water. The wastewater treated by this process is crystal clear, showing significant results. At the same time, an exhaust gas collection pipe is installed at the top of the ozone catalytic oxidation unit; the collected exhaust gas is sent to an exhaust gas decomposer for harmless treatment, thereby achieving energy conservation, environmental protection, as well as a low-carbon, green approach. Since October, the water treatment plant has begun conducting experiments with liquid ferric chloride as a treatment agent, as well as testing its use in actual operations. This agent can reduce the biochemical oxygen demand in wastewater by about 40% and remove more than 50% of the turbidity. After the addition of ferric chloride, the flux of the reverse osmosis membranes improves rapidly, and their operational cycle is extended – they can operate for over 5 days without needing to be cleaned. This solves the problem of the inability of reverse osmosis membranes in systems for reusing biochemical wastewater to function for long periods, ensures that the quality standards of the reclaimed water used to replenish process water are met, enhances the reliability of the desalination system’s operation, and significantly reduces the labor required for cleaning the membranes as well as the amount of chemical agents used. This lays the foundation for the gradual return of the water system to normal operation. The quality of the water produced through coagulation is improving, which ensures that the inlet parameters for the submerged ultrafiltration system gradually approach the design values. The membrane flux is slowly returning to normal, creating the conditions for stable operation under high loads over extended periods of time. The use of ferric trichloride ensures the stable operation of the submerged ultrafiltration membrane. To further enhance the wastewater treatment capacity, the water treatment workshop of Xintian Coal Chemical Industry hastened to develop a tuning plan for ozone catalytic oxidation, by clarifying responsibilities and ensuring strict control over equipment quality and project progress. Leaders provide direct guidance, managers offer timely support, and operators tackle challenges head-on, ensuring comprehensive management and full-process oversight. Hard work pays off; as the Spring Festival approached, the ozone catalytic oxidation unit was successfully started up in one attempt. The successful operation of this device has opened up new approaches for optimizing the water system process, providing a roadmap for further optimization of the entire system. With the normal operation of the ozone catalytic oxidation unit, a series of analysis results provided by the central laboratory came into view. The data showed that the chemical oxygen demand of the wastewater generated by the wastewater treatment system decreased from 3000 milligrams per liter to around 100 milligrams per liter, achieving a removal rate of 97%; meanwhile, the concentration of phenolic pollutants dropped from 480 milligrams per liter to 4.5 milligrams per liter, with a removal rate of 99.1%. These results met the expected goals, marking a \"qualitative\" improvement in water resource recycling. http://img.yf116.cn/image/img/20220131/8148289087.jpg The operation of the ozone catalytic oxidation unit has improved the process flow for advanced wastewater treatment, reduced the clogging of membrane systems caused by organic pollutants, met the requirements of production operations, accelerated the improvement of the quality of circulating water, and ensured the safe and stable operation of the water system. The successful operation of the ozone-catalyzed oxidation process for wastewater treatment at Xintian Coal Chemical Industry marks another breakthrough in the optimization of the company’s water treatment processes. By gradually improving the quality of water in the system, this approach enhances the quality of treated wastewater and reduces the workload on employees, providing a solid foundation for the overall improvement of the water treatment processes and contributing to the sustainable development of Xintian Coal Chemical Industry