Application of heterogeneous catalytic oxidation process in printing and dyeing wastewater

Abstract

The invention discloses application of a heterogeneous catalytic oxidation process in printing and dyeing wastewater. The application comprises the following steps: S1, taking wastewater in the printing and dyeing process; S2, pouring the wastewater in the step S1 into an adjusting tank for acidifying hydrolysis treatment; S3, putting the wastewater subjected to acidification and hydrolysis treatment in the S2 into a heterogeneous catalytic reactor for heterogeneous catalytic oxidation treatment; S4, taking out the wastewater subjected to heterogeneous catalytic oxidation in the S3, pouring the wastewater into a biochemical treatment tank, and carrying out biochemical treatment; and S5, discharging the wastewater of which the water quality reaches the first class of the national comprehensive discharge standard in the step S4. Compared with the traditional process, the wastewater treatment process has the advantages that the content of CODcr in the wastewater can be effectively removed, the B / C ratio and the wastewater decolorization efficiency are improved, and the treatment efficiency is greatly improved while the wastewater treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment technology, in particular to the application of a heterogeneous catalytic oxidation process in printing and dyeing wastewater. Background technique [0002] As a labor-intensive, water-intensive, and heavily polluting industry, printing, dyeing and textiles have less and less room for development in developed countries. Many developed countries have moved their printing and dyeing factories to developing countries like my country. There are a large number of printing and dyeing factories, and the printing and dyeing industry has become a major polluter in our country. [0003] The content of suspended matter in printing and dyeing wastewater is high, the output of physical and chemical treatment sludge is large, and the cost of sludge treatment is high. The content of soluble and refractory organic matter in printing and dyeing wastewater is high, and it is difficul...

AI Technical Summary

Problems solved by technology

[0003] The content of suspended matter in printing and dyeing wastewater is high, the output of physical and chemical treatment sludge is large, and the cost of sludge treatment is high. The content of soluble and refractory organic matter in printing and dyeing wastewater is high, and it is difficult to meet the treatment standards; the discharge of printing and dyeing wastewater is large, which has a great impact on the receiving water body , the treatment cost is high (especially the sludge treatment cost of physical and chemical treatment process), the treatment effect is poor, and most of the treatment equipment are not in normal operation; therefore, a heterogeneous catalytic oxidation process is proposed in the application of printing and dyeing wastewater to solve the above problems