Microbial fuel cell and application thereof to degradation of azo dye pollutant

Abstract

The invention discloses a microbial fuel cell and application thereof to degradation of azo dye pollutants. The microbial fuel cell comprises an anode chamber, a cathode chamber, an anode electrode, a cathode electrode, a proton permeable membrane and an external circuit. Electrochemical active microbes are inoculated in the anode chamber. Culture solution for the microbes, a carbon source and electron donors are also contained in the anode chamber. Cathode reaction liquid is contained in the cathode chamber and consists of Shewanella decolorationis and culture solution thereof. Electron acceptors of the Shewanella decolorationis are also contained in the cathode chamber. The microbial fuel cell oxidizes an organic substrate in the solution through the microbes in the anode chamber, generated electrons are transferred to the anode electrode and the electrons on the anode electrode are transferred to the cathode electrode through the external circuit. In the cathode chamber, the Shewanella decolorationis accepts the electrons on the cathode electrode, grows and metabolizes. The electrons are transferred to end electron acceptors such as the azo dye pollutants through a respiratory chain to reduce and degrade the azo dye pollutants. Therefore, the microbial fuel cell can be used for the treatment of the pollutants.

Description

Technical field: [0001] The invention relates to a microbial fuel cell and its application, in particular to a microbial fuel cell using Shewanella decolorationis as the electron acceptor of the cathode, and its application in degrading azo dye pollutants. Background technique: [0002] Azo dyes are widely used in the industrial fields of textile, printing and dyeing, pharmaceutical and food, and enter the environment with the discharge of wastewater. Since almost all azo dyes are artificially synthesized and have stable chemical properties, they are difficult to degrade in the natural environment. With the discovery of the potential "three-induced" effect of azo dyes and related intermediate products, the degradation of azo dyes has received more and more attention. [0003] Traditional azo dye degradation methods include electrochemical method and microbial anaerobic-aerobic combined degradation method, but each has the disadvantages of high energy consumption, high cost ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned pollutant treatment research using electrodes as electron donors requires an external power source to balance the electrodes in the working device at a fixed potential. This method is difficult to achieve in practical applications due to high energy consumption.

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