A method and device for advanced treatment of wastewater by heterogeneous catalytic ozonation

Abstract

The invention provides a heterogeneous catalysis and ozone oxidation method, and an apparatus thereof. The apparatus is characterized in that: with adopting a coupling method of sectional ozone oxidation and catalytic oxidation, most organic matters can be removed through the ozone oxidation reaction in a ozone oxidation zone, wherein the most organic matters can be oxidized by the ozone; the generated organisms hard to be oxidized by the ozone from the reaction and the original refractory organic matters in the waste water react with hydroxyl radicals generated through the catalysis in a catalytic oxidation zone to generate low molecular weight compounds, carbon dioxide and water, such that the organic matters in the waste water are substantially reduced, and the biodegradability is improved; the catalytic oxidation zone adopts two catalysts of a regular catalyst and a porous catalyst such that a uniform water distribution effect and a uniform gas distribution effect are provided, the degradation of the organic matter can be efficiently catalytically oxidized. According to the method and the apparatus provided by the present invention, the refractory organic matters in the waste water can be removed, the utilization efficiency of the ozone is improved, the apparatus has characteristics of simple structure and easy operation, the method is an efficient and low-cost waste waterdeep treatment method.

Description

technical field [0001] The invention belongs to the field of advanced treatment of wastewater, and in particular relates to a method and a device for advanced treatment of catalytic ozonation wastewater. Background technique [0002] my country is currently entering the middle and late stages of industrialization, and the characteristics of heavy chemical industrialization are becoming more and more prominent. The consumption of resources and energy is large. In addition, the extensive growth mode of high investment, high emission, low cycle, and low efficiency has not been fundamentally changed. The total amount of pollutant emissions has long been at the Environmental pollution and resource and energy shortages have gradually become bottlenecks seriously restricting the sustainable development of the industrial economy. [0003] Some heavily polluting industries such as iron and steel, chemical industry, pharmaceuticals, plastic rubber, dyestuffs, printing and dyeing, etc. ...

AI Technical Summary

Problems solved by technology

Since wastewater generally contains organic matter that can be directly oxidized by ozone and refractory organic matter that is not easily oxidized directly by ozone, if the catalytic ozone oxidation method is used alone, the hydroxyl radicals produced by catalysis can react with two kinds of organic matter at the same time. The reaction probability of degrading organic matter is reduced; and because the ratio of hydroxyl radicals generated by ozonolysis is generally 2:1, a large number of hydroxyl radicals react with organic matter that can be oxidized by ozone alone, resulting in a relatively low ozone utilization rate

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