High-efficiency decolorization and recycling method of printing wastewater

A technology for printing wastewater and decolorization, which is applied in chemical instruments and methods, textile industry wastewater treatment, water/sewage treatment, etc., can solve the problems of complex treatment process, complex equipment, high treatment cost, etc., achieve low cost, avoid discharge, reduce the effect of pressure

Active Publication Date: 2015-11-25
BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process also has the problems of high processing cost, complicated equipment, and complicated processing process.

Method used

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  • High-efficiency decolorization and recycling method of printing wastewater

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Effect test

Embodiment 1

[0034] A high-efficiency decolorization and reuse method for printing waste water, comprising the following steps:

[0035] Collect 3000mL of printing waste water in the reactor, slowly add sulfuric acid to adjust the pH value of the waste water to 3-4;

[0036] Mix tributyl phosphate and aviation kerosene uniformly at a volume ratio of 2:8 to obtain a decolorizing solution;

[0037] Take 100ml of the decolorizing solution and add it to the printing waste water adjusted to pH for decolorization treatment. After reacting for 30 minutes, let it stand for 30 minutes to obtain the loaded decolorizing solution of the upper layer and the reused water of the lower layer.

[0038] It can be observed that the recycled water in the lower layer is nearly colorless, and the decolorization rate reaches 99%.

[0039] Add 18ml of sodium hydroxide solution with a mass concentration of 20% to the loaded decolorizing solution on the upper layer, and react for 30 minutes. The dye loaded in the ...

Embodiment 2

[0048] A high-efficiency decolorization and reuse method for printing waste water, comprising the following steps:

[0049] Collect 3000mL of printing waste water in the reactor, slowly add sulfuric acid to adjust the pH value of the waste water to 3-4;

[0050] Mix trioctyl phosphate and aviation kerosene in a volume ratio of 3:7 to obtain a decolorizing solution;

[0051] Take 80ml of the decolorizing solution and add it to the printing waste water with adjusted pH for decolorization treatment. After reacting for 35 minutes, let it stand for 35 minutes to obtain the loaded decolorizing solution of the upper layer and the reused water of the lower layer.

[0052] It can be observed that the recycled water in the lower layer is nearly colorless, and the decolorization rate reaches 99%.

[0053] Add 20ml of potassium hydroxide solution with a mass concentration of 15% to the loaded decolorizing solution on the upper layer. After reacting for 20 minutes, the dye loaded in the dec...

Embodiment 3

[0057] A high-efficiency decolorization and reuse method for printing waste water, comprising the following steps:

[0058] Collect 3000mL of printing waste water in the reactor, slowly add sulfuric acid to adjust the pH value of the waste water to 3-4;

[0059] Mix trioctylphosphine and sulfonated kerosene uniformly at a volume ratio of 4:6 to obtain a decolorizing solution;

[0060] Take 100ml of the decolorizing solution and add it into the printing waste water with adjusted pH for decolorization treatment. After reacting for 60 minutes, let it stand for 60 minutes to obtain the loaded decolorizing solution of the upper layer and the reused water of the lower layer.

[0061] It can be observed that the recycled water in the lower layer is nearly colorless, and the decolorization rate reaches 99%.

[0062] Add 15ml of sodium carbonate solution with a mass concentration of 10% to the loaded decolorizing solution on the upper layer. After reacting for 30 minutes, the dye load...

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Abstract

The invention discloses a high-efficiency decolorization and recycling method of printing wastewater, which comprises the following steps: mixing a reactant and a diluter in a volume ratio of (2-4):(6-8) to obtain a decolorization solution; regulating the pH value of the printing wastewater to 3-4; and mixing the decolorization solution and printing wastewater to carry out decolorization treatment, and stratifying to obtain the loaded decolorization solution and recycled water. The method can quickly implement decolorization on the wastewater, and the decolorization rate can reach 99%. The decolorized printing wastewater can be directly recycled for the water washing technique, thereby enhancing the water resource utilization ratio.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment in the printing and dyeing industry. More specifically, it relates to a method for efficient decolorization and reuse of printing wastewater. Background technique [0002] Printing wastewater is a general term for the wastewater generated during the printing, soaping, and washing processes of fabrics. After printing, unreacted dyes, auxiliaries, intermediates and isomers entrained in dye products, and hydrolyzed products of dyes are removed from the surface of the fabric into the printing wastewater, resulting in a very complex composition of printing wastewater. At the same time, these pollutants are mostly macromolecular organic compounds (such as aromatic hydrocarbons and heterocyclic compounds) with chromophoric groups and polar color-aiding groups, resulting in high chroma of printing wastewater, which is difficult to treat up to standard. In addition, these pollutants have cer...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F103/30
Inventor 程迪欧云川杨宏伟
Owner BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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