Cationic dye printing and dyeing wastewater treatment process

Abstract

The invention provides a cationic dye printing-dyeing wastewater treatment process, which belongs to the technical field of wastewater treatment. The treatment process uses a foam separation technique to treat cationic dye printing-dyeing wastewater, and concretely comprises the following: step 1, cationic dye printing-dyeing wastewater is collected and detected; step 2, the cationic dye printing-dyeing wastewater is pretreated; step 3, foam separation cyclic decolorization is carried out, which comprises a step of discoloring four times, wherein a device is a bubbling tower with the diameterof 32 mm; the decolorization needs sodium dodecyl benzene sulfonate as anionic surfactant every time; the cationic dye printing-dyeing wastewater after treatment meets the GB8978-1996 secondary discharge standard every time and is directly discharged; and a cationic dye crude product obtained by filtering anti-foam liquid is applied to a printing-dyeing procedure again; and step 4, evaporation and crystallization are carried out, and the collected cationic dye crude product is applied to the printing-dyeing procedure. The process has the advantages that the process can realize the industrial production of cationic dye printing-dyeing wastewater treatment, is convenient to operate and low in cost, and can greatly reduce secondary pollution.

Description

Cationic Dye Printing and Dyeing Wastewater Treatment Process technical field The technical solution of the invention belongs to the field of waste water treatment, in particular to a cationic dye printing and dyeing waste water treatment process. Background technique The printing and dyeing industry is a large discharge of industrial wastewater. The dye printing and dyeing wastewater discharged by it has a large amount of water, high concentration of organic pollutants, deep color, poor biochemical properties, large changes in water quality and complex components. Therefore, dye printing and dyeing wastewater is a difficult industry to treat. One of the wastewater. CN200710134018.0 discloses a natural plant material and method for treating cationic dyes in industrial wastewater. The patent is to use discarded natural plant material pomelo peel to treat cationic dye wastewater. The optimal process is to add 1-2g per liter of wastewater Grapefruit peel particles. If 1.5g...

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Problems solved by technology

CN200710150106.X discloses the treatment process of treating anionic dye printing and dyeing wastewater with foam separation technology, but at present, the technology of treating cationic dye printing and dyeing wastewater with foam separation technology has not yet seen relevant literature reports