Improving Purification Performance: Ozone Catalytic Technology in Wastewater Treatment
Ozone catalytic technology is a process method that degrades organic matter in wastewater by combining the strong oxidizing power of ozone with the catalytic properties and adsorption of catalysts. Compared with ozone oxidation alone, this method can, at lower pH, use catalysts to promote the decomposition of ozone into hydroxyl radicals; its reaction rate is fast and non-selective, greatly improving the removal efficiency of total organic carbon (TOC) and chemical oxygen demand (COD), and effectively improving the biodegradability of landfill leachate. Therefore, this technology has become one of the key methods for landfill leachate treatment. Depending on the form of the catalyst, ozone catalytic technology can be mainly divided into homogeneous and heterogeneous types.
Homogeneous catalytic ozonation technology
This technology commonly uses transition metal ions such as copper, zinc, manganese, ferrous and iron ions as catalysts. These ions can trigger ozone to produce hydroxyl radicals, thereby promoting the decomposition of organic matter. Transition metal ions affect not only the rate of ozone reactions but also the reaction selectivity and ozone consumption.
Although homogeneous catalysis has a good removal effect on organic matter in landfill leachate and can noticeably improve its biodegradability, metal ions are lost to a certain extent and are difficult to recover, leading to rising operating costs and easily causing secondary pollution to water quality. To avoid such pollution, heterogeneous ozone catalytic technology can be used for leachate treatment.
Heterogeneous catalytic ozonation technology
As a novel ozone oxidation process that can oxidize refractory organic matter at ambient temperature and pressure, heterogeneous catalytic technology uses catalysts that are easy to separate and do not cause secondary pollution. Commonly used catalysts in this technology include metal oxides, activated carbon, and carrier-supported metal oxides, which can improve ozone utilization efficiency and organic matter removal rates.
In heterogeneous catalysis, the active components of the catalyst are usually metals or metal oxides, where the metals mainly include copper, platinum, lead, palladium and silver. At present, in the field of ozone treatment of landfill leachate, metal oxide catalysts are relatively widely used; common examples include manganese oxide, titanium oxide, aluminum oxide and cobalt oxide. Such catalysts have high catalytic activity and have received extensive research attention.
Ozone catalytic technology can effectively reduce the activation energy of harmful components in water and even change the reaction mechanism for oxidizing organic matter, thereby achieving efficient pollutant removal.
SINOKLE's patented technology - the heterogeneous ozone catalytic oxidant
SINOKLE has independently developed a patented heterogeneous ozone catalytic oxidant that can significantly improve ozone utilization efficiency, with the following technical characteristics:
High efficiency:Heterogeneous ozone catalytic oxidation technology can significantly enhance the ability of the ozone system to produce hydroxyl radicals, thereby improving the ability of ozone to directly oxidize organic matter and achieving efficient and highly mineralized removal of organic matter.
Good stability: The selection and design of the catalyst support and active components give the catalyst good stability, maintaining high catalytic activity over long periods.
Regenerable and reusable:The catalyst can be regenerated and reused, reducing treatment costs.
Wide application:This technology is not only applied in the field of wastewater treatment, but also has broad application prospects in air pollution control, chemical synthesis, energy conversion and other fields.
Technical advantages:
Improved ozone utilization efficiency:Heterogeneous ozone catalysts can accelerate the spontaneous decomposition of ozone in water and increase the concentration of hydroxyl radicals in the water, thereby strengthening the oxidation effect; their oxidation efficiency is 2 to 5 times higher than that of ozone oxidation alone.
Reduced risk of secondary pollution:The catalyst exists in solid form and is easy to separate from water, reducing catalyst loss and secondary pollution.
Strong adaptability and shock resistance:The catalyst can be adjusted according to changes in water quality and water quantity, with strong adaptability and outstanding resistance to shock loads.
