Dye wastewater treatment method

Abstract

The invention provides a dye wastewater treatment method. A dye wastewater treatment system comprises a pretreatment tank, a photocatalytic oxidation reaction tank, a homogeneous regulation tank, a biological reaction tank and a sedimentation tank which are sequentially arranged along a wastewater flowing direction. Suspended pollution particles in the wastewater are removed through pretreatment, part of macromolecular organic dye and other macromolecular organic pollutants are deeply oxidized into non-toxic and harmless micromolecular substances through photocatalytic oxidation, and the pH value of the wastewater is adjusted to be larger than or equal to 6 through homogenization treatment. Residual macromolecular organic pollutants are removed through biological treatment, micromolecular organic matters in the wastewater are further decomposed into inorganic matters, sludge in water is further precipitated through precipitation treatment, and the wastewater can be discharged after the water quality reaches the standard. The photocatalytic oxidation treatment needs low energy consumption, the water treatment cost is low, the environment protection is facilitated, and the development of dyeing and chemical enterprises is facilitated.

Description

Technical field [0001] The present invention belongs to the field of environmental protection technology, specifically relates to a dye wastewater treatment method. Background [0002] Dye wastewater has the characteristics of high color, high content of organic pollutants, large alkalinity, difficult biochemical degradation of organic matter, and large changes in water quality, which makes dye wastewater one of the industrial wastewater that is difficult to treat. [0003] In view of the stable chemical properties of most dyes and the difficulty of degradation, the degradation and treatment methods of dyes and dye wastewater need to be studied urgently. With the progress of science and technology and the continuous development of pollution control technology, human beings have also found many effective ways to treat dye wastewater, mainly divided into physical, chemical and biological methods. However, in practical applications, conventional treatment methods often fail to disch...

AI Technical Summary

Problems solved by technology

It is less harmful to the environment and has a wider pH range, but it also has shortcomings such as photocorrosion and insufficient specific surface area that limit its application.

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