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Printing and dyeing cyanide-containing wastewater treatment method

A treatment method and technology for cyanide wastewater, which is applied in the field of water treatment, can solve the problems of less treatment of cyanide-containing printing and dyeing wastewater and inability to remove colloidal hydrophobic dyes, and achieve the effects of low cost, simple device, and simple operation

Active Publication Date: 2014-11-26
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorbents commonly used in industry include activated carbon, etc., which are very effective in removing dissolved organic matter in water, but cannot remove colloidal hydrophobic dyes in water
[0004]Although there are many treatment methods for ignition wastewater, there are relatively few treatment methods for printing and dyeing wastewater containing cyanide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A treatment method for printing and dyeing cyanide-containing wastewater, comprising the following steps:

[0027] (1) The cyanide-containing wastewater is firstly adsorbed by ion exchange resin; the ion exchange resin is a strong basic anion exchange resin, and the dosage is 7g per liter of water;

[0028] (2) Add fatty alcohol polyoxyethylene ether sodium sulfate and sodium hypochlorite to cyanide-containing wastewater. The amount of fatty alcohol polyoxyethylene ether sodium sulfate added is twice the molar concentration of cyanide in wastewater. The amount of sodium hypochlorite added 4 times the molar concentration; and control the pH to 11 for 1h, then control the pH to 7.4 for 2h; control the water temperature to 30°C

[0029] (3) Adjust the pH value of the wastewater to 6.3, and then add copper sulfate and hydrogen peroxide to the wastewater. The amount of copper sulfate added is 3g per liter of wastewater, and the amount of hydrogen peroxide added is 10m1 per l...

Embodiment 2

[0033] A treatment method for printing and dyeing cyanide-containing wastewater, comprising the following steps:

[0034] (1) The cyanide-containing wastewater is firstly adsorbed by ion exchange resin; the ion exchange resin is a strong basic anion exchange resin, and the dosage is 10g per liter of water;

[0035] (2) Add fatty alcohol polyoxyethylene ether sodium sulfate and sodium hypochlorite to cyanide-containing wastewater. The amount of fatty alcohol polyoxyethylene ether sodium sulfate added is 1 times the molar concentration of cyanide in wastewater. The amount of sodium hypochlorite added 5 times the molar concentration; and control the pH to 10 for 2h, then control the pH to 7.7 for 1-2h; control the water temperature to 30°C

[0036] (3) Adjust the pH value of the wastewater to 6, and then add copper sulfate and hydrogen peroxide to the wastewater. The amount of copper sulfate added is 2g per liter of wastewater, and the amount of hydrogen peroxide added is 10m1 pe...

Embodiment 3

[0040] A treatment method for printing and dyeing cyanide-containing wastewater, comprising the following steps:

[0041] (1) The cyanide-containing wastewater is firstly adsorbed by ion exchange resin; the ion exchange resin is a strong basic anion exchange resin, and the dosage is 7-10g per liter of water;

[0042] (2) Add fatty alcohol polyoxyethylene ether sodium sulfate and sodium hypochlorite to cyanide-containing wastewater. The amount of fatty alcohol polyoxyethylene ether sodium sulfate added is 1-2 times the molar concentration of cyanide in wastewater, and the amount of sodium hypochlorite added to wastewater 3-5 times the molar concentration of cyanide; and control the pH to 10-11 for 1-2h, then control the pH to 7.3 for 2h; control the water temperature to 34°C

[0043] (3) Adjust the pH value of the wastewater to 6-6.5, and then add copper sulfate and hydrogen peroxide to the wastewater. The amount of copper sulfate added is 1g per liter of wastewater, and the am...

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PUM

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Abstract

The invention relates to the field of water treatment, and concretely relates to a printing and dyeing cyanide-containing wastewater treatment method. The method comprises the following steps: adsorbing the cyanide-containing wastewater by adopting an ion exchange resin; and adding a reagent to wastewater to carry out multiple oxidation complexation of cyanides in the wastewater in order to remove the cyanides.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a treatment method for printing and dyeing wastewater containing cyanide. Background technique [0002] Printing and dyeing wastewater is the main source of water pollution in the textile industry. It not only has large discharge volume, high chroma, complex composition, difficult biodegradation and high pollution degree, but also some dyes are toxic. With the development of chemical fiber fabrics and the advancement of printing and dyeing finishing technology, a large number of refractory organic substances such as sizing, dyes, detergents, chemical auxiliaries and finishing agents enter the printing and dyeing wastewater, which increases the difficulty of wastewater treatment. The existing biological treatment system has problems such as low treatment efficiency, large amount of residual sludge, large amount of water treatment chemicals and high operating costs. Therefore, the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/18C02F103/30
Inventor 孙静亚邢宇
Owner ZHEJIANG OCEAN UNIV
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