Sewage treatment system for dye printing

Abstract

The invention discloses a sewage treatment system for dye printing, and aims at solving the problem of poor decomposition effect of a conventional sewage treatment system on organic matters in the sewage. The sewage treatment system is characterized in that according to the sewage treatment system for dye printing, printing sewage is sequentially introduced into a hair fishing pool, a collecting pool, an adsorption precipitation pool, a hydrolyzation pool, an aerobic pool, a degasification pool, a sedimentation pool, a middle water pool, a chemical adding pool, an air floating pool, an activecarbon pool, a secondary sedimentation pool and recycled water reuse equipment. Sewage generated through dye printing is subjected to physical, chemical and biological decomposition. The sewage treatment system for dye printing has the advantages that the decomposition is more thorough and efficient, so that the systemic treatment on the dye printing sewage can be completed; the sewage discharge problem is effectively solved; contribution is made for emission reduction and environment protection.

Description

technical field [0001] The invention relates to the field of sewage treatment, more specifically, it relates to a sewage treatment system for printing and dyeing. Background technique [0002] Printing and dyeing wastewater refers to the wastewater discharged from the pretreatment, dyeing, printing and finishing of cotton, wool, hemp, silk, chemical fiber or blended products. It contains a large amount of complex components such as dyes, sizing agents, and surfactants. It has the characteristics of large chroma, high concentration of organic matter, strong alkalinity, and large changes in water quality and water volume. It is difficult to treat and belongs to difficult-to-treat industrial wastewater. Printing and dyeing wastewater is produced in multiple processes such as washing and dyeing, printing, and sizing. It contains a large amount of organic matter such as dyes, starch, cellulose, lignin, and detergent, as well as inorganic matter such as alkali, sulfide, and variou...

AI Technical Summary

Problems solved by technology

There are mainly four treatment methods for printing and dyeing wastewater, physical treatment, chemical treatment, biological treatment, and alkali reduction treatment. However, due to the complex composition of printing and dyeing wastewater, a single treatment method often cannot achieve the desired treatment effect. For example, the application number is The patent title disclosed in 201520398981.X is a kind of anaerobic and aerobic integrated device in a printing and dyeing wastewater treatment device. On the one hand, it can save equipment and reduce cost investment. It can be used in the anaerobic stage and further reduces the trace element content of the water body. Through the electrolytic cell equipped with activated carbon and metal filters, the organic pollutants, pigments and some inorganic salts in the printing and dyeing wastewater are completely removed, and the water quality is effectively improved. However, for textile printing and dyeing wastewater that is difficult to biochemically treat, the anaerobic reaction can only treat part of the organic matter, and a large part of the refractory organic matter cannot be completely decomposed.

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