An Innovative Solution to High-Salinity Wastewater Purification: The Core Value of SINOKLE's Heterogeneous Ozone Catalytic Technology
At present, for the purification of high-salinity industrial wastewater, multiple solutions coexist in the industry, each with its applicable scenarios and limitations. Traditional methods represented by distillation desalination have long been applied, but face challenges such as huge energy consumption, high operating costs and difficulty meeting large-volume treatment needs. With the deepening of environmental awareness across society and the continuous evolution of water treatment technology, integrating the advantages of multiple technologies has become the mainstream direction for high-salinity wastewater. Through system integration and optimization of multiple treatment processes, SINOKLE has built a technology system centered on ozone catalytic oxidation. This system not only significantly improves the treatment efficiency of high-salinity wastewater but also effectively controls operating expenses, achieving synergistic gains between economic benefits and environmental protection.
Among the diverse wastewater purification technologies, the heterogeneous ozone oxidation process has attracted widespread attention and research thanks to its excellent oxidation performance, no chemical sludge, and no secondary pollution. This technology has outstanding decomposition capability for pollutants that are difficult to biodegrade, and is a maturely applied advanced oxidation method. To address the problems of low ozone utilization efficiency and low hydroxyl radical yield in direct ozone oxidation, SINOKLE has used its proprietary special ozone catalyst to successfully promote the conversion of ozone into multiple highly reactive oxygen species such as hydroxyl radicals (OH), superoxide radicals (O2-) and singlet oxygen (1O2), thereby greatly improving the degradation efficiency of organic pollutants.
1. Principle of ozone advanced oxidation technology
Ozone (O3) is a gas with extremely strong oxidizing ability. Its reaction with harmful substances in wastewater is mainly achieved through two pathways: one is that ozone molecules directly attack pollutant molecules, converting them into simpler small molecules; the other is that during decomposition ozone generates highly reactive intermediates represented by hydroxyl radicals (OH), which further deeply oxidize the organic matter until it is completely mineralized into carbon dioxide and water. Hydroxyl radicals are regarded as the most ideal oxidant in advanced oxidation reactions; their reactivity is extremely high and non-selective, enabling them to quickly decompose stubborn organic matter in wastewater.
2. Application advantages of ozone advanced oxidation technology
(1) Efficient treatment: Ozone advanced oxidation technology can efficiently degrade organic pollutants in wastewater, reduce chemical oxygen demand (COD) and color, and improve the biodegradability of the wastewater.
(2) Environmentally friendly with no secondary pollution: The final products of the ozone oxidation process are carbon dioxide and water, introducing no new pollutants and meeting environmental requirements.
(3) Strong adaptability: Ozone oxidation is not affected by the salinity of the wastewater and can maintain strong oxidizing power in high-salt environments, making it suitable for treating high-salinity wastewater.
(4) Multifunctionality: In addition to degrading organic matter, ozone can also remove odor and unpleasant smells from water, as well as metal ions such as iron and manganese, improving water quality.
3. SINOKLE heterogeneous ozone catalytic oxidation for high-salinity wastewater
Compared with traditional treatment methods, ozone advanced oxidation technology shows obvious advantages in treatment efficiency, reaction conditions, operational simplicity and comprehensive cost. Most crucially, this technology fundamentally eliminates secondary pollution and can improve the salt recovery rate of high-salinity wastewater, fully complying with current environmental regulations and standards.
The principle by which the ozone oxidation process improves salt recovery in high-salinity wastewater mainly involves the following aspects:
(1) Oxidative decomposition of organic matter: As a strong oxidant, ozone can effectively oxidize and decompose the organic matter in high-salinity wastewater, converting it into harmless carbon dioxide and water, thereby reducing the chemical oxygen demand (COD) of the wastewater. This process helps reduce the organic pollutants in the wastewater and improve wastewater treatment efficiency.
(2) Improvement of flocculation: In high-salinity wastewater treatment, because the wastewater contains large amounts of soluble inorganic salts such as chloride, sodium, sulfate and calcium ions, these salts have obvious inhibitory effects on conventional biological treatment. Ozone oxidation technology can effectively improve this situation by changing the properties of the suspended matter in the water through oxidation, making the suspended particles larger. This helps improve the salt recovery rate while reducing the amount of flocculant used and lowering chemical consumption.
(3) Application of catalytic ozone oxidation: In some cases, catalysts (such as Fe/Al2O3) are added to improve the oxidation efficiency of ozone. Catalysts can promote ozone decomposition and produce more hydroxyl radicals, thereby improving the oxidation efficiency of organic matter. However, it should be noted that certain components in the wastewater (such as silicates) may deactivate the catalyst and affect the catalytic oxidation performance of the overall process.
(4) Optimization of the ozone oxidation process: In practical applications, by optimizing the ozone oxidation process, such as adjusting the ozone flow rate, pH value and reaction time, the treatment effect on high-salinity wastewater can be further improved. For example, by adjusting the ozone flow rate and reaction time, the COD value of the wastewater can be effectively reduced.
(5) Use of heterogeneous ozone catalysts: In some high-salinity wastewater treatment projects, heterogeneous ozone catalysts are used to further improve ozone removal efficiency. The use of such catalysts can improve ozone utilization, thereby more effectively removing organic matter from the wastewater and improving the salt recovery rate.
(6) Ozone-hydrogen peroxide coupled catalytic oxidation: In some cases, the combined use of ozone and hydrogen peroxide can further improve COD removal. With suitable catalysts and pH conditions, this method has shown advantages of high efficiency, economy and wide applicability in practical applications, and is especially suitable for treating industrial wastewater containing refractory organic matter and high salinity.
Applying ozone oxidation technology to high-salinity wastewater treatment can not only enhance the recovery value of salt resources but also effectively reduce the pollution load of the wastewater and the environmental footprint. With the continuous improvement of this technology, it is expected to play an increasingly important role in the field of high-salinity wastewater treatment, injecting vitality into the innovative development of the environmental protection industry. It should be particularly noted that the successful implementation of ozone advanced oxidation technology largely depends on the development and selection of efficient catalysts. Optimizing the material selection and preparation process of catalysts is of decisive significance for improving ozone utilization efficiency, enhancing oxidation reaction performance, and ensuring long-term stable and reliable system operation.
