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Efficient dyed wastewater treatment method

A technology for dyeing wastewater and treatment methods, which is applied in the direction of water treatment parameter control, water/sewage multi-stage treatment, neutralized water/sewage treatment, etc., and can solve the problems of large consumption of electrode materials, high operating conditions, and low decolorization efficiency, etc. problems, to achieve the effect of low washing cost, reduced environmental pollution and high decolorization efficiency

Active Publication Date: 2016-04-13
NANNING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this method: high power consumption and electrode material consumption, DC power supply required, suitable for small amount of wastewater treatment
[0008] 6. Oxidation method: the decolorization efficiency is low, only 40-50%, and the coagulation decolorization efficiency is high, reaching between 50-90%. However, after these methods are used, the effluent still has a deep chroma, and further decolorization treatment is necessary At present, the methods used for dehydration of printing and dyeing wastewater mainly include photooxidation, ozone oxidation and chlorine oxidation. Due to reasons such as price, the most widely used method is chlorine oxidation. The commonly used oxidants include liquid chlorine, bleaching powder and sodium hypochlorite. This method is due to Higher processing costs and higher operational operating conditions with less adaptation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The invention provides a kind of high-efficiency dyeing wastewater treatment method, comprising the following steps:

[0026] 1) Sodium metasilicate mixed solution configuration, add 5 parts by weight of sodium metasilicate to 80 parts by weight of water according to the above ratio, then heat to 50°C, and then add 10 parts by weight of white carbon to the solution at a speed of 10g / s black, and stir until the solution is clear and cool;

[0027] 2) measure the pH value of waste water, use neutralizer to adjust the pH value of waste water to 7, then add 1% quaternary ammonium salt of waste water weight to water, stir 30min, described quaternary ammonium salt is hexadecyl Trimethylammonium chloride;

[0028] 3) Add 4% sodium metasilicate mixed solution of waste water weight, stir and react for 30min;

[0029] 4) Add 1% cationic or anionic polyacrylamide by the weight of wastewater, stir for 30 minutes, and then let stand for 1 day.

Embodiment 2

[0031] The invention provides a kind of high-efficiency dyeing wastewater treatment method, comprising the following steps:

[0032] 1) Sodium metasilicate mixed solution configuration, add 20 parts by weight of sodium metasilicate to 100 parts by weight of water according to the above ratio, then heat to 99°C, and then add 20 parts by weight of white carbon to the solution at a speed of 50g / s black, and stir until the solution is clear and cool;

[0033] 2) measure the pH value of waste water, use neutralizer to adjust the pH value of waste water to 8, then add 4% quaternary ammonium salt of waste water weight to water, stir 60min, described quaternary ammonium salt is octadecyl Trimethylammonium chloride;

[0034] 3) Add 10% sodium metasilicate mixed solution of waste water weight, stir and react for 60min;

[0035] 4) Add 2% cationic or anionic polyacrylamide by the weight of waste water, stir and react for 60 minutes, and then let stand for 3 days.

Embodiment 3

[0037] The invention provides a kind of high-efficiency dyeing wastewater treatment method, comprising the following steps:

[0038] 1) Sodium metasilicate mixed solution configuration, add 5 parts by weight of sodium metasilicate to 80 parts by weight of water according to the above ratio, then heat to 50°C, and then add 10 parts by weight of white carbon to the solution at a speed of 10g / s black, and stir until the solution is clear and cool;

[0039] 2) measure the pH value of waste water, use neutralizer to adjust the pH value of waste water to 7, then add 1% quaternary ammonium salt of waste water weight to water, stir 30min, described quaternary ammonium salt is hexadecyl Trimethylammonium chloride: octadecyltrimethylammonium chloride = 1:1;

[0040] 3) Add 4% sodium metasilicate mixed solution of waste water weight, stir and react for 30min;

[0041] 4) Add 1% cationic or anionic polyacrylamide by the weight of wastewater, stir for 30 minutes, and then let stand for 1...

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Abstract

The invention provides an efficient dyed wastewater treatment method, and belongs to the technical field of wastewater treatment. The process comprises the steps of firstly performing quaternary ammonium salt treatment, then, performing sodium metasilicate mixed solution treatment, and finally performing treatment through cationic or anionic polyacrylamide. The efficient dyed wastewater treatment method is simple in production process, novel and unique in formula, high in decoloration efficiency, less in using amount, and low in washing cost, the treatment effect is greatly superior to that of a current same product, the degree of pollution of industrial wastewater to environment is reduced, and the treated dyed wastewater can be used as washing water process water circularly.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a high-efficiency dyeing wastewater treatment method. Background technique [0002] At present, in the prior art, the commonly used chemical processes for dyeing sewage treatment are as follows: [0003] 1. Neutralization method: In printing and dyeing wastewater, this method can only adjust the pH of wastewater, but cannot remove pollutants in wastewater. [0004] 2. Coagulation method: use chemical agents to combine a large number of dyes, detergents and other microparticles in the wastewater into large particles to remove them. The coagulants used in the treatment of printing and dyeing wastewater include basic aluminum chloride, polyacrylamide, aluminum sulfate, and alum , ferric chloride, etc. [0005] 3. Air flotation method: printing and dyeing wastewater contains a large amount of organic colloidal particles in the form of milky various oils, etc. T...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F1/66C02F9/00C02F2101/308C02F2209/06
Inventor 朱甜霞黄仁富
Owner NANNING UNIV
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