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An electrolysis-ion membrane coupled device and method for treating high-chloride organic wastewater

A technology of organic wastewater and ionic membrane, which is applied in the direction of ion exchange water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of increasing treatment costs, difficulty in meeting discharge standards for organic matter content in wastewater, and high difficulty. Achieve the effects of strong conductivity and chemical resistance, lower real current density, and long plate life

Active Publication Date: 2020-12-15
西安优瑞卡环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, the treatment of high-chloride dye wastewater is extremely difficult, due to the presence of a large amount of Cl in the wastewater - (chloride ion content is greater than 1g / L), the conventional biochemical method is difficult to play a role, and a large amount of flocculant needs to be added, which increases the treatment cost, and the organic matter content of the biochemically treated wastewater is still difficult to meet the discharge standard

Method used

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  • An electrolysis-ion membrane coupled device and method for treating high-chloride organic wastewater
  • An electrolysis-ion membrane coupled device and method for treating high-chloride organic wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Example 1: Wastewater treatment of an organic dye processing enterprise

[0041] The wastewater from this enterprise mainly contains azo dyes direct dark brown and acid scarlet. The concentration is about 2000mg / L, and the salinity in the raw wastewater is as high as 50000mg / L. Conventional biological treatment is difficult to achieve the effect. In the present invention, first introduce the organic waste water into a self-made electrolytic cell equipped with a titanium-based iridium dioxide-plated DSA anode and a carbon felt cathode. 2 , Electrolysis time: 90min. During the electrolysis process, the reactor is filled with waste water, and the waste water is continuously circulated from the anode chamber to the cathode chamber through a peristaltic pump to form a circulation loop. Test results such as figure 2 shown.

[0042] From figure 2 It can be seen that after 90min, the current density is 30mA / cm 2 When the removal rate of organic matter is 30%; the curre...

Embodiment 2

[0043] Example 2: Treatment of dyeing wastewater in a fur processing enterprise

[0044] The fur processing enterprise mainly processes wool products. During the dyeing stage, various dyes such as phenols, acrylics, and tannins are added, with a concentration of 2000-6000 mg / l. The salinity of the raw wastewater is about 3%. Conventional biochemical methods need to add a large amount of flocculation The organic matter content of wastewater after biochemical treatment is still difficult to meet the discharge standard, and the chroma is still high. Adopt the method of the present invention, at first introduce this organic waste water in the self-made electrolyzer that is equipped with titanium-based iridium dioxide-plated DSA anode, carbon felt cathode, the volume of electrolyzer is 25L, control current density: 50mA / cm 2 , Electrolysis time: 40 ~ 100min. During the electrolysis process, the reactor is filled with waste water, and the waste water is continuously circulated from...

Embodiment 3

[0045] Example 3: Wastewater treatment of a pharmaceutical company

[0046] The wastewater produced by the pharmaceutical company is strongly acidic, high-salt, and high-organic wastewater. The chloride ion in the wastewater is about 60,000 mg / L, and the COD is about 50,000 mg / L. Due to the large amount of salt, conventional biochemical methods are difficult to operate, and the three-phase evaporation method is usually used to treat the salt in wastewater, which is extremely costly. By adopting the method of the present invention, waste water is passed into a self-made electrolytic cell equipped with a titanium-based iridium dioxide-plated DSA anode and a carbon felt negative electrode. The volume of the electrolytic cell is 25L, and the control current density is 50mA / cm 2 , Electrolysis time: 90min. Due to the complex composition of organic matter in wastewater, the removal rate of organic matter is basically maintained at about 60%, and 0.25mol / L Fe is added to the cathode...

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Abstract

The invention relates to a method and a device for electrolysis-ionic membrane coupled treatment of high-chlorine-salt organic wastewater. The method includes: leading to-be-treated high-chlorine-salt organic wastewater into an anode chamber of a reactor, wherein an intermediate chamber is positioned on one side of the anode chamber, a cathode chamber is positioned on the other side of the intermediate chamber, the anode chamber and the intermediate chamber are isolated through a cation exchange membrane, and the intermediate chamber and the cathode chamber are isolated through an anion exchange membrane; electrifying an anode electrode in the anode chamber and a cathode electrode in the cathode chamber, electrolyzing the to-be-treated high-chlorine-salt organic wastewater, discharging up-to-standard electrolyzed wastewater, or returning into the anode chamber for cyclic electrolysis until up-to-standard emission is realized, so that electrolysis-ionic membrane coupled treatment of high-chlorine-salt organic wastewater is completed. According to an indirect active chlorine electrochemical oxidation method, organic dyes in the wastewater are partially degraded or macromolecular substances are converted into micro-molecular intermediates; residual organic pollutants in indirect active chlorine electrochemical oxidation are subjected to oxidative decomposition to obtain CO2 and H2O.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to an electrolysis-ion membrane coupled device and method for treating high-chloride organic wastewater. Background technique [0002] With the rapid development of my country's industrial industry, the ensuing environmental pollution problem is becoming more and more serious. In particular, the treatment of high-chloride dye wastewater is extremely difficult, due to the presence of a large amount of Cl in the wastewater - (chloride ion content is greater than 1g / L), the conventional biochemical method is difficult to play a role, and a large amount of flocculant needs to be added, which increases the treatment cost, and the organic matter content of the biochemically treated wastewater is still difficult to reach the discharge standard. Contents of the invention [0003] The purpose of the present invention is to overcome the problems existing in the prior art...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/72C02F1/42
CPCC02F1/42C02F1/4672C02F1/4674C02F2101/308
Inventor 马宏瑞马鹏飞董贺翔陈阳郝永永
Owner 西安优瑞卡环保科技有限公司
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