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Cationic dye printing and dyeing wastewater treatment process

A technology for cationic dyes and printing and dyeing wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve simple equipment, low cost, and reduce secondary pollution

Inactive Publication Date: 2009-03-11
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 200710150106.X discloses the treatment process of anionic dye printing and dyeing wastewater by foam separation technology, but there is no relevant literature report on the technology of treating cationic dye printing and dyeing wastewater by foam separation technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The first step is the collection and detection of cationic dye printing and dyeing wastewater

[0029] Cationic dye printing and dyeing wastewater from a printing and dyeing factory was collected. It was detected that the cationic dye pigment contained in the cationic dye printing and dyeing wastewater was basic violet 5BN, and its molar concentration was 4.7×10 -6 mol / L, COD is 520mg / L, color is 480 times, pH is 8.6;

[0030] The second step, cationic dye printing and dyeing wastewater pretreatment

[0031] Regulate the pH value of the cationic dye printing and dyeing wastewater described in the first step to 9.0 with sodium hydroxide, and divide it into four batches equally;

[0032] The third step, foam separation cycle decolorization process

[0033] For the first decolorization, add SDBS to the first batch of cationic dye printing and dyeing wastewater after the second step pretreatment, the molar ratio of the amount of SDBS added and the amount of basic violet 5...

Embodiment 2

[0047] The first step, the collection and detection of cationic dye printing and dyeing wastewater

[0048] The cationic dye printing and dyeing wastewater of a printing and dyeing factory was collected. The dye pigment contained in the cationic dye printing and dyeing wastewater was detected to be Basic Brilliant Blue BO, and the molar concentration of Basic Brilliant Blue BO was 8.0×10 -6 mol / L, COD is 820mg / L, color is 720 times, pH is 7.1;

[0049] The second step, cationic dye printing and dyeing wastewater pretreatment

[0050] Regulate the pH value of the cationic dye printing and dyeing wastewater described in the first step to 8.0 with sodium hydroxide, and divide it into four batches equally;

[0051] The third step, foam separation cycle decolorization process

[0052] For the first decolorization, add SDBS to the first batch of cationic dye printing and dyeing wastewater after the second step pretreatment, and the molar ratio of the amount of SDBS added to the ba...

Embodiment 3

[0066] The first step, the collection and detection of cationic dye printing and dyeing wastewater

[0067] The cationic dye printing and dyeing wastewater of a printing and dyeing factory was collected. After testing, the dye pigment contained in the cationic dye printing and dyeing wastewater was basic brown RC, and the molar concentration of basic brown RC was 9.6×10 -6 mol / L, COD is 1160mg / L, color is 980 times, pH is 10.5;

[0068] The second step, cationic dye printing and dyeing wastewater pretreatment

[0069] The pH value of the cationic dye printing and dyeing wastewater described in the first step is adjusted to 9.0 with hydrochloric acid, and it is equally divided into four batches;

[0070] The third step, foam separation cycle decolorization process

[0071] For the first decolorization, add SDBS to the first batch of cationic dye printing and dyeing wastewater after the second step pretreatment, the molar ratio of the amount of SDBS added to the amount of basi...

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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 diameter of 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

technical field [0001] The technical scheme 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 [0002] 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. [0003] CN 200710134018.0 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 of pomelo peel particles are added to ev...

Claims

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Application Information

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IPC IPC(8): C02F9/00
Inventor 吴兆亮张晓龙卢珂丁红梅
Owner HEBEI UNIV OF TECH
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