The main function of the decolorant for textile dyeing and printing wastewater is to remove the chromaticity and organic substances in the wastewater, thereby improving the water quality.
Specific Functions
1.Removal of Chromaticity: Through the principle of flocculation and sedimentation, the decolorant can effectively remove the chromaticity in the wastewater, achieving the desired treatment effect.
2.Reduction of COD and BOD: The decolorant can not only remove chromaticity but also significantly reduce the Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) in the wastewater, alleviating the organic load of subsequent biochemical treatment.
3.Removal of Suspended Solids and Surfactants: The decolorant can remove suspended solids, oils, and surfactants in the wastewater, realizing the separation of solid and liquid.
4.Improvement of Water Quality: Through flocculation and sedimentation, the decolorant can separate the colorants from the water, significantly reducing other pollutants in the wastewater and improving the water quality.
Application Scenarios
The decolorant is widely applied in the wastewater treatment of multiple industries, including but not limited to:
-Dye Factories: Treating high-chromaticity dye wastewater.
-Textile Factories: Treating the wastewater generated during the textile production process.
-Dyeing and Printing Factories: Treating the wastewater during the dyeing and printing process.
-Paper Mills: Treating the wastewater during the papermaking process.
-Ink Factories: Treating the wastewater generated during the ink production process.
Composition and Principle
The decolorant is usually synthesized by the condensation polymerization of formaldehyde dicyandiamide resin with the addition of a specific catalyst, and it is a cationic organic polymer compound. Its high-density cationic charge groups can combine with the anionic groups in the wastewater to form hydrophobic insoluble salts that are separated from the water. In addition, the active groups on the molecular chain of the decolorant can chemically react with the anionic groups such as sulfonic acid groups and carboxylic acid groups in the dye molecules to generate substances insoluble in water, thus removing the color in the water.
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