A high-efficiency organic waste water degrading method

Abstract

A high-efficiency organic waste water degrading method is disclosed. The method includes steps of adding a complexing agent after all ferrous ions are oxidized into ferric ions on the basis of a traditional Fenton reaction; and after a complexing reaction, adding hydrogen peroxide to allow a Fenton-like reaction between the hydrogen peroxide and an iron complex compound under ultraviolet radiation to occur so as to continuously generate hydroxyl radicals. According to the method, through combination of the traditional Fenton reaction and the Fenton-like reaction of the iron complex compound and ferric ions, the reaction pH range is wide, the application range is wide, the total iron amount of the reactions is less than the iron adding amount in the traditional Fenton reaction, iron ion cyclic effects are superior to those of the traditional Fenton reaction, the utilization rate is high, the amount of sludge is low, operation is simple, degradation effects are good, the cost is low and operation is convenient. The method can be used for treating pharmaceutical waste water, pesticide waste water, printing and dyeing waste water, and the like. The waste water COD removing rate after treatment can be 89% or above. The method has a good application prospect.

Description

technical field

[0001] The invention belongs to the technology of environmental protection, and in particular relates to a novel process for efficiently degrading organic waste water. Background technique

[0002] Advanced oxidation technology is widely used in the removal of refractory organic pollutants in water. Among them, Fenton oxidation technology is considered to be one of the most economical, efficient and promising oxidation treatment technologies. by H 2 o 2 with Fe 2+ The reason why the oxidation system that constitutes the Fenton method can efficiently oxidize refractory pollutants is that hydroxyl radicals (·OH) are generated during the oxidation system. In order to generate a sufficient amount of hydroxyl radicals, it is necessary to ensure that the system maintains an ideal concentration of H 2 o 2 with Fe 2+ . for H 2 o 2 The ideal concentration can be achieved by continuously supplying H to the system 2 o 2 way to obtain and maintain. Fe exists...