Decolorization in paper mills and printing and dyeing industries

Release time：2023-08-03 13:29:15  Author：科胜美  Viewed: 240 times

The wastewater produced by printing and dyeing has the characteristics of complex composition, large amount of water, large chromaticity and difficult treatment. Sewage contains a large number of alkali, printing and dyeing agents, with greater toxicity, pollution to the environment is great. Many printing and dyeing factories use a combination of chemical treatment and biochemical treatment, this method is difficult to degrade the azo dyes in wastewater, it is difficult to achieve the predetermined effect. If the use of sewage treatment ozone generator can completely solve this problem.

Wastewater treatment ozone machine in printing and dyeing wastewater decolorization, odor removal, COD degradation and other aspects have made a prominent contribution. Ozone is a kind of oxidizing agent, the oxidation of ozone has wide adaptability to dyes and high decolorization efficiency. At the same time, the reduction product of ozone in wastewater and excess ozone can be quickly decomposed into oxygen in solution and air, and will not produce secondary pollution problems.

Ozone has a good decolorization effect. It can oxidize and decompose the chromogenic substances in wastewater to achieve the purpose of wastewater decolorization. Its reaction with organic and inorganic substances in printing and dyeing wastewater is extremely complex, mainly through two ways, namely the direct reaction of ozone (D reaction) and the indirect reaction of ozone decomposition to produce radical free radicals (OH·) (R reaction).