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Sewage treatment method coupled with organic membrane and electro-Fenton catalytic technology

A sewage treatment method and catalytic technology, which is applied in the field of organic conductive membrane membrane filtration combined with electro-Fenton degradation of pollutants, can solve the problems of membrane pore blockage, increased turbidity of water samples, and reduced flux, etc. The effect of enhancing effective contact, reducing workload, and mitigating membrane fouling

Inactive Publication Date: 2013-07-10
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a sewage treatment method coupled with organic membrane and electro-Fenton catalysis technology. The catalyst is compounded and fixed on the conductive membrane, which solves the problem of functionalization of the conductive membrane, and also solves the problem of membrane technology and advanced oxidation technology. Increased water sample turbidity, membrane pore clogging, membrane fouling, and flux reduction during the binding process, especially for membrane aging and low reaction efficiency due to poor mass transfer,

Method used

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  • Sewage treatment method coupled with organic membrane and electro-Fenton catalytic technology

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Embodiment 1

[0012] Micro-electric field conditions are used to treat low-concentration methylene blue dye wastewater. The concentration of methylene blue solution is 5 mg / L in the water sample to be treated. The graphene / polypyrrole modified polyester fabric modified conductive catalytic membrane was prepared. The membrane assembly was placed in the reaction vessel as the cathode, and the stainless steel mesh with the same size as the membrane assembly was used as the anode. The distance between the cathode and the anode was 1cm. Adjust water sample parameters, electrolyte Na 2 SO 4 Concentration 0.05mol / L, Fe 2+ Concentration 0.2mmol / L, pH=4, aeration rate 0.2L / min, electric field strength E=1V / cm, membrane flux 100L / m 2 h. When the DC power is turned on, the dissolved oxygen forms H on the surface of the cathode membrane. 2 o 2 , with Fe 2+ Fenton’s reagent is formed, and the methylene blue molecule is catalyzed and degraded near the membrane electrode; due to membrane filtration,...

Embodiment 2

[0014] The conductive catalytic composite organic membrane in Example 1 is used as the negative electrode of the microbial fuel cell. When a certain resistance is connected externally, a certain voltage difference is formed between the anode and the negative electrode of the microbial fuel cell, and a current flows through the external circuit, generating a continuous current on the negative electrode. The electron flow, through the catalysis of the catalytic layer, makes the dissolved oxygen reduction

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Abstract

A sewage treatment method coupled with an organic membrane and electro-Fenton catalytic technology belongs to the technical field of sewage treatment in environmental engineering. The sewage treatment method is characterized in that a conductive polymer modified organic fabric membrane is used as a cathode membrane, while a stainless steel mesh is used as an anode, a Fenton reagent is formed in the vicinity of the membrane under the conditions of appropriate electric field, dissolved oxygen, pH value and ferrous ion concentration, and the reaction liquid is circulated through membrane filtration so that the Fenton reagent is dispersed in the system. For the characteristics of sewage, the type and the size of the cathode membrane, the voltage and the like can be optimized. Power generation microorganisms in sewage-treatment microbial fuel cells generate electric power by utilizing sewage, oxygen is reduced by using electrons transmitted from the anode while the organical membrane serves as the cathode; and hydrogen peroxide is formed to arouse Fenton reaction so as to degrade pollutants. The sewage treatment method provided by the invention has the following advantages that organic membrane separation is combined with the electro-Fenton catalytic technology, the pollution and the load of the membrane assembly are reduced, effective contact and reaction of the pollutants and the membrane electrode are enhanced by membrane filtration; and furthermore, through membrane filtration, large-particle pollutants difficult to degrade can be removed.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to sewage treatment and reclaimed water reuse technology, in particular to the combined use technology of membrane filtration of an organic conductive membrane with catalytic function and electro-fenton degrading pollutants. Background technique [0002] Membrane technology has broad market prospects in the field of sewage treatment. In order to obtain better sewage treatment effects, coupling membrane technology with other technologies is a research hotspot. The combination of membrane technology and advanced oxidation technology can improve the efficiency of wastewater treatment. At present, the combination of catalysis and membrane technology is usually to put powder catalyst into the reactor, make it react with water pollutants, and recover the catalyst through membrane filtration. This method increases the turbidity of treated water samples, which easily leads to...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F1/44C02F1/72
Inventor 柳丽芬赵凤杨凤林
Owner DALIAN UNIV OF TECH
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