Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-efficiency decolorization and recycling method of printing wastewater

Examples

Experimental program
Comparison scheme
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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/00C02F103/30
Inventor 程迪欧云川杨宏伟
Owner BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com