Combination electrode preparation method and application of combination electrode preparation method in bioelectricity Fenton system

A composite electrode and anode chamber technology, applied in biological water/sewage treatment, textile industry wastewater treatment, water/sludge/sewage treatment, etc., can solve the problem of slow anaerobic metabolism, long residence time and organic Pollutants are difficult to meet the standards and other problems, to achieve the effect of speeding up sewage treatment, prolonging the service life of electrodes, and improving the effect of sewage treatment

Inactive Publication Date: 2015-01-28
JIANGNAN UNIV
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  • Application Information

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Problems solved by technology

Although this method has a good treatment effect on most dye wastewater and realizes the reuse of water resources, it has the disadvantages of difficult cleaning, easy clogging, easy pollution, and high regeneration costs.
The biological method uses the metabolism of microorganisms to decompose and transform organic matter in wastewater, but the aerobic method consumes a lot of energy, generates a large amount of sludge, and it is difficult to meet the standards for the treatment of organic pollutants with complex structures and high concentrations. The speed is slow, the container volume is large, the residence time is long, and it is difficult to meet the emission standard if it is used alone
Chemical methods mainly include coagulation-sedimentation method, oxidation method, electrochemical method, etc. The cost of the method is high. Oxidation technology is suitable for use in conjunction with other technologies to treat wastewater. Electrochemical methods have high requirements for equipment, so they cannot be widely used.

Method used

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  • Combination electrode preparation method and application of combination electrode preparation method in bioelectricity Fenton system
  • Combination electrode preparation method and application of combination electrode preparation method in bioelectricity Fenton system

Examples

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Embodiment 1

[0025] The preparation of embodiment 1 composite electrode

[0026]In the Soxhlet extractor, the carbon fiber was washed with ethanol-acetone solution with a volume ratio of 1:1 for 10 h to prevent the oxidation products of impurities from being adsorbed on the surface of the carbon fiber and affect its quality, and then it was taken out and dried at 80°C to constant weight for use. In a fume hood equipped with a reflux pipe, heat the oxidized carbon fiber with an acidic potassium dichromate solution, the oxidation time is 1-3h, the oxidation temperature is 80-120°C, and the solution is shaken every 20min. The mass ratio of carbon fiber to oxidant is 1: 50. The carbon fibers were taken out, soaked and washed with deionized water for 5 times, and dried at 80°C until constant weight.

[0027] Take 3g of oxidized activated carbon and immerse in 3g / L of FeCl 3 ·6H 2 O solution, the solution was ultrasonically treated at 30°C and 40KHz for 1h, and 15g / L NaBH 4 solution added to...

Embodiment 2

[0028] Example 2 Putting the prepared composite electrode into a bioelectrochemical system to treat dye wastewater

[0029] combined with figure 1 , 2 described as follows:

[0030] Such as figure 1 As shown, the present invention uses a bioelectrochemical system as a reactor, which is composed of an anode chamber and an anode chamber separated by a cation exchange membrane. The cathode utilizes a peristaltic pump to take in water from the water inlet (6), and samples are taken through the water outlet 7, and the electricity-producing microorganisms and iron catalysts are attached to the carbon brushes (1) and (2) respectively.

[0031] First, a total volume of 550 mL of electrogenic nutrient solution and anaerobic sludge supernatant was inoculated into the anode chamber, wherein the volume ratio of electrogenic nutrient solution to anaerobic sludge supernatant (containing electrogenic microorganisms) was 3 : 1. The anaerobic sludge was taken from Wuxi Chengbei Sewage Trea...

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Abstract

The invention discloses a combination electrode preparation method and the application of the combination electrode preparation method in a bioelectricity Fenton system, and belongs to the field of environmental engineering and waste water treatment. According to a combination electrode prepared through the combination electrode preparation method, a bioelectrochemistry system serves as a reactor to treat azo dye waste water, anode electro-microorganisms oxidize organic matter so that electrons and protons can be generated, the electrons and the protons are transferred to a cathode chamber through an external circuit and an ion exchange membrane, H2O2 is generated on a cathode in an in-situ mode with O2 as the electron acceptor, a cathode iron source is slowly released, Fenton reaction is performed between iron and H2O2 generated in the in-situ mode, and thus non-biodegradable pollutants are treated.

Description

technical field [0001] The invention relates to the preparation of a composite electrode and its application in a bioelectric Fenton system, belonging to the fields of environmental engineering and wastewater treatment. Background technique [0002] With the development of the printing and dyeing industry, the discharge of dye wastewater is increasing, and the pollution area is becoming wider and wider. It has become one of the most important sources of water pollution. Azo dyes account for 80% of organic dyes, and the wastewater discharge is large and complex in composition, which is refractory wastewater. [0003] At present, the methods used in the treatment of azo dye wastewater mainly include: physical method, biological method and chemical method. Physical methods mainly include adsorption method and membrane separation method, which use physical action to separate azo dyes from wastewater, and then recycle or further treat them. Although this method has a good treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F103/30
CPCC02F3/00C02F2103/30
Inventor 严群凌婷刘浩赵楠
Owner JIANGNAN UNIV
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