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Efficient discoloring agent and discoloring treatment method of printing and dyeing wastewater

A printing and dyeing wastewater and decolorizing agent technology, which is applied in textile industry wastewater treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problem of high price of dicyandiamide-formaldehyde polymer decolorizing agent, rising cost of sewage treatment, lack of Low cost, decolorizing agent and other issues, to achieve the effect of facilitating subsequent treatment, easy concentration and dehydration, and separation of mud and water

Active Publication Date: 2015-01-07
佑景天(北京)国际水环境研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of dicyandiamide-formaldehyde polymer decolorizer is expensive, which leads to an increase in the cost of sewage treatment, which is not conducive to popularization
At the same time, the preparation process of its substitute products reacts violently, and it cannot be reasonably formulated according to actual needs
[0005] In summary, there is currently a lack of a decolorant that can simultaneously and quickly remove hydrophobic and hydrophilic dyes in printing and dyeing wastewater with high efficiency and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of decolorizing agent

[0041] 1) Take 100g of diatomaceous earth, add 5g of ferrate and 15g of activated carbon to it, mix well, and prepare mixture A;

[0042] 2) Take 10g of iron oxide, 10g of ferric chloride, 32g of calcium sulfate, 20g of aluminum sulfate, 2.5g of organic flocculant and 25g of cement, mix them evenly, and prepare mixture B;

[0043] 3) Mix mixture A and mixture B evenly to prepare the high-efficiency decolorizer for printing and dyeing wastewater.

[0044] (2) Decolorization treatment

[0045] Take 1L of RGB red-containing reactive dye wastewater with a chroma of 6000 times, directly add 50g of the decolorizer prepared above to the wastewater, and stir while adding at a stirring speed of 280r / min for 2min. Then place it in a superconducting magnetic separation device, set the hydraulic retention time to 3min, and the magnetic field strength to 4T. After precipitation, take the supernatant, the measured chromaticity is 10 times, a...

Embodiment 2

[0047] (1) Preparation of decolorizing agent

[0048] 1) Take 100g of diatomaceous earth, add 5g of ferrate reagent and 20g of activated carbon to it, and prepare mixture A;

[0049] 2) Take 15g of iron oxide, 15g of ferric chloride, 35g of calcium sulfate, 30g of aluminum sulfate, 3g of organic flocculant and 30g of cement, mix them evenly, and prepare mixture B;

[0050] 3) Mix mixture A and mixture B evenly to prepare the high-efficiency decolorizer for printing and dyeing wastewater.

[0051] (2) Decolorization treatment

[0052] Take 1L of reactive dye wastewater containing BES blue with a chroma of 10,000 times, directly add 60g of the decolorizer prepared above to the wastewater, and stir while adding at a stirring speed of 300r / min for 3min. Then place it in a superconducting magnetic separation device, set the hydraulic retention time to 4min, and the magnetic field strength to 5T. After precipitation, take the supernatant, the measured chromaticity is 10 times, an...

Embodiment 3

[0054] (1) Preparation of decolorizing agent

[0055] 1) Take 100g of diatomaceous earth, add 8g of ferrate reagent and 25g of activated carbon to it, and prepare mixture A;

[0056] 2) Take 20g of iron oxide, 20g of ferric chloride, 50g of calcium sulfate, 40g of aluminum sulfate, 5g of organic flocculant and 50g of cement, mix them evenly, and prepare mixture B;

[0057] 3) Mix mixture A and mixture B evenly to prepare the high-efficiency decolorizer for printing and dyeing wastewater.

[0058] (2) Decolorization treatment

[0059] Take 1L of reactive dye wastewater containing RGB red and BES blue with a chromaticity of 20000 times, directly add 100g of the decolorizer prepared above to the wastewater, and stir while adding at a stirring speed of 320r / min for 5min. Then place it in a superconducting magnetic separation device, set the hydraulic retention time to 5min, and set the magnetic field strength to 3T. After precipitation, take the supernatant, the measured color ...

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Abstract

The invention relates to an efficient discoloring agent and a discoloring treatment method of printing and dyeing wastewater. The efficient discoloring agent of the printing and dyeing wastewater comprises the following components in parts by mass: 100 parts of diatomite, 15-25 parts of active carbon, 5-10 parts of ferrate, 10-20 parts of iron oxide, 10-20 parts of ferric chloride, 32-55 parts of calcium sulfate, 20-50 parts of aluminum sulfate, 2.5-5 parts of an organic flocculant and 25-50 parts of cement. The discoloring treatment method of printing and dyeing wastewater comprises the following step: directly adding the efficient discoloring agent of the printing and dyeing wastewater into to-be-treated printing and dyeing wastewater, stirring while adding, and separating by using a superconductive magnetic separating device. The efficient discoloring agent can be used for quickly removing hydrophobic dyes and hydrophilic dyes in the printing and dyeing wastewater, is good in discoloring effect, can be directly added without being dissolved, is simple and convenient to operate, capable of realizing good magnetic separating effect in case of not additionally adding magnetic seeds, and low in treatment cost.

Description

technical field [0001] The invention relates to a decolorizing agent and a decolorizing method for decolorizing printing and dyeing wastewater, belonging to the field of wastewater treatment. Background technique [0002] Printing and dyeing wastewater contains a large amount of dyes, which has the characteristics of complex composition, large chroma, and low biodegradability. It has become one of the most polluted and difficult industrial wastewater. Among them, the removal of chroma is a major problem in the treatment of printing and dyeing wastewater. [0003] Dyes in printing and dyeing wastewater are mainly divided into two types: hydrophilic and hydrophobic. Hydrophobic dyes mainly refer to colloidal hydrophobic dyes that are suspended in water. Hydrophilic dyes are typically reactive dyes, which are commonly used in the printing and dyeing industry. Compared with other dyes, reactive dyes are easy to dissolve in water and difficult to remove from water. The decolori...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/28C02F1/72
CPCC02F1/281C02F1/283C02F1/488C02F1/5236C02F1/5245C02F1/56C02F1/72C02F9/00C02F2101/308C02F2103/30
Inventor 董志刚张伟锋席北斗赵颖刘文芳李晓光郭祎阁彭星
Owner 佑景天(北京)国际水环境研究中心有限公司
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