Reactive dye-containing printing and dyeing sewage treatment system and method

Abstract

The invention discloses a reactive dye-containing printing and dyeing sewage treatment system and a reactive dye-containing printing and dyeing sewage treatment method. The reactive dye-containing printing and dyeing sewage treatment system at least comprises a first adjusting tank, a biological selection tank, a biochemical treatment system, a secondary sedimentation tank, a coagulation tank, a flocculation tank, an efficient sedimentation tank and a clear water tank which are sequentially connected, wherein the coagulation tank gathers pollutants in sewage by a coagulating agent containing sodium chlorate and polyaluminum sulfate. The reactive dye-containing printing and dyeing sewage treatment system is exquisite in design and simple in structure; through design of the whole system, main pollutants are removed by the biochemical treatment system first and then pollutants which cannot be degraded by the biochemical treatment system are removed through coagulation and sedimentation, so that through organic combination of various treatment methods and optimization of the coagulating agent, sodium alginate in dye-containing wastewater is removed while the conventional pollutants areremoved, and a special treatment effect is achieved on the reactive dye-containing printing and dyeing wastewater and requirements on treatment of the wastewater can be effectively met.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a printing and dyeing sewage treatment system containing reactive dyes and a treatment method thereof. Background technique [0002] Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. With the development of the printing and dyeing industry, a large number of chemical fiber products appear, new chemical pulp, The application of dyeing chemicals and finishing agents makes the composition of printing and dyeing wastewater more complicated and further increases the difficulty of treatment. [0003] Conventional treatment methods mainly use biochemical treatment, but the effluent COD and chroma of pure biochemical treatment methods are often difficult to meet the standards. Biochemically treated wastewater ...

AI Technical Summary

Problems solved by technology

[0002] Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. With the development of the printing and dyeing industry, a large number of chemical fiber products appear, new chemical pulp, The application of dyeing chemicals and finishing agents makes the composition of printing and dyeing wastewater more complicated, further increasing the difficulty of treatment

[0003] Conventional treatment methods mainly use biochemical treatment, but the effluent COD and chroma of pure biochemical treatment methods are often difficult to meet the standards. Biochemically treated wastewater is not easily degraded by natural self-purification after being discharged into the natural environment

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