Do you know industrial wastewater purification technology?
Printing and dyeing industry production process will discharge a large amount of wastewater, dyeing and finishing wastewater with complex components, high organic content, high salt content, high chromaticity and other characteristics, is a great impact on the environment and difficult to treat industrial wastewater, the use of new dyes and additives aggravated the dyeing and finishing wastewater is difficult to biochemical degradation. Only conventional biochemical/physicochemical treatment is carried out, COD and chromaticity of dyeing and finishing wastewater cannot meet the discharge or reuse standards, and its deep purification has become an urgent problem to be solved in the industry. In recent years, "catalytic oxidation technology" has become a cutting-edge technology in the field of deep purification of dyeing and finishing wastewater. Under the action of catalysts, this technology USES light, electricity or environment-friendly oxidants to convert the refractory organic pollutants in wastewater into non-toxic small molecule organic matter or complete mineralization.
Catalytic oxidation technology mainly includes electrochemical oxidation method, Fenton method, photocatalytic oxidation method, catalytic ozone oxidation method, etc., all of which have different degrees of problems in practical application. The future research in this field is the breakthrough and integration of the existing technology. Specifically, it includes the development of new electrode materials with high efficiency, low cost and high stability. Supported photocatalytic oxidation catalysts and corresponding catalytic oxidation reactors were developed. The utilization rate of light in photocatalytic oxidation was improved by reactor design and wastewater pretreatment process. Development of multiphase catalytic ozonation technology; And the existing catalytic oxidation purification technology for the dominant combination, such as electrocatalysis + ozone synergistic technology, catalytic ozone oxidation - photocatalytic oxidation.