Decoloring treatment method of printing and dyeing wastewater

Abstract

The invention discloses a decoloring treatment method of printing and dyeing wastewater. The decoloring treatment method of the printing and dyeing wastewater is characterized by comprising the following steps: placing the printing and dyeing wastewater into a container or a treatment pond; performing suspended substance filtering treatment on the printing and dyeing wastewater; adding 3 to 6 square meters of nano-titanium dioxide immobilized catalytic pieces into each cubic meter of printing and dyeing wastewater which is subjected to filtering treatment; adding hydrogen peroxide, wherein the volume of the hydrogen peroxide is 0.001 to 0.01 percent of that of the printing and dyeing wastewater which is subjected to filtering treatment; stirring completely; irradiating by using a mercury lamp. The nano-titanium dioxide immobilized catalytic pieces are prepared by fixing titanium dioxide on the surface of ceramic by a physical burning and solidifying manner, have a good physical contact effect, are difficult to separate and achieve a long-term effective catalytic effect; the spectral range of the mercury lamp is wide and close to a natural spectrum, so the safety is higher; the nano-titanium dioxide immobilized catalytic pieces and organic matters in the printing and dyeing wastewater generate chemical reaction, so the color organic matters in the printing and dyeing wastewater can be effectively decolored and the treated water is free from secondary pollution.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a decolorization treatment method for printing and dyeing wastewater. Background technique [0002] With the continuous increase of chemical plants, more and more sewage discharges, especially some textile dye processing plants, produce a lot of printing and dyeing wastewater every day. Although textile dye processing factories will also treat printing and dyeing wastewater accordingly, the treatment is quite simple, and the wastewater often contains colored organic matter. After such colored printing and dyeing wastewater is discharged, it will not only pollute the environment, but also waste a lot of water. of water resources. [0003] The publication number is CN 102976536A, and the Chinese patent literature published on March 20, 2013 discloses a method for treating printing and dyeing wastewater of disperse reactive dyes. P hour is 8.5-9.5, adding 100-300mg / l dec...

AI Technical Summary

Problems solved by technology

[0005] 1. Adding ferrous ions is easy to cause secondary reaction with organic matter in printing and dyeing wastewater, causing pollution and increasing the cost

[0006] 2. Nano-titanium dioxide is plated on asbestos mesh. This solid form will easily cause nano-titanium dioxide to detach during long-term use, resulting in failure, which directly affects the treatment effect of printing and dyeing wastewater.

[0007] 3. Irradiate with ultraviolet light, its spectral range is narrow, and professional ultraviolet lamps should be used for irradiation, which is less safe