The Main Role of Sewage Decoloring Agent in Printing & Dyeing Plant

The Main Role of Sewage Decoloring Agent in Printing & Dyeing Plant

Printing and dyeing factory sewage refers to the wastewater produced in the process of printing and dyeing processing, its complex composition, high pollution load, is one of the typical difficult to degrade organic wastewater. Printing and dyeing processing process needs a large amount of water for washing, rinsing and other operations, so the amount of water in printing and dyeing plant is usually large. Sewage mainly comes from each process of printing and dyeing processing, including pretreatment stage (burning, grouting, boiling, bleaching, silk light and other processes), dyeing process, printing process and finishing process.

A decolorization agent is a substance that removes useless staining groups in wastewater or substances by chemical or physical action. It usually has many functions, such as decolorization, flocculation, degradation of chemical oxygen demand (COD) and other functions. Decolorization agent plays an important role in wastewater treatment, which can effectively reduce the chromaticity and COD of wastewater, while improving the efficiency of subsequent biochemical treatment.

Decolorizers are mainly used in the following applications:

Dyeing wastewater treatment: suitable for decolorization of wastewater such as reactive, acid and disperse dyes.

Papermaking wastewater treatment: used to remove the color in papermaking wastewater.

Ink and pigment wastewater treatment: remove the pigment and ink from the wastewater.

Other industrial wastewater treatment: such as coking, leather, chemical and other industries wastewater decolorization.

Food processing: used for adsorption decolorization in the production of food grade enzyme preparations.

Dyeing and printing enterprises must install wastewater treatment facilities in accordance with relevant laws and regulations to ensure that wastewater meets discharge standards. At the same time, they need to regularly monitor wastewater discharge and accept supervision and inspection from environmental protection departments. Applying more efficient wastewater treatment technologies and equipment to reduce treatment costs is also a development direction for the dyeing and printing industry.

More details contact with Vivian Sun 86 13790671695 viviansun@san-mei.com