Method for utilizing zero-valent iron to reinforce microbial fuel cell for degrading typical nitrogen-contained heterocyclic compounds

Abstract

The invention discloses a method for utilizing zero-valent iron to reinforce anaerobic-MFC (microbial fuel cell) coupling for degrading quinoline and indole as typical nitrogen-contained heterocycliccompounds. The microbial fuel cell comprises an anode, a cathode, and a proton membrane. Both the anode and the cathode of the microbial fuel cell adopt carbon brush fibers as electrodes, microbes which can degrade quinoline and indole as nitrogen-contained heterocyclic compounds and have electrochemical activity are respectively inoculated on the anodic carbon brush, the cathode adopts potassiumferricyanide as an electron acceptor, and a cathode chamber and an anode chamber are partitioned by the proton exchange membrane. The solution of the nitrogen-contained heterocyclic compounds first reacts in an acclimatized anaerobic bottle for 24 hours, the supernate in the anaerobic bottle is adopted as a carbon source for the microbes, and with the constant oxidation of the anodic organic matter and the continuous proceeding of cathodic reaction, an external circuit can be connected to the carbon brushes of the two electrodes through wires to form a circuit. Because the invention utilizes cheap zero-valent iron to reinforce the microbial fuel cell for degrading typical nitrogen-contained heterocyclic compounds, the degradation of typical nitrogen-contained heterocyclic compounds is accelerated, more electric energy is recovered, and the energy consumption cost of the process is reduced.

Description

technical field [0001] The invention relates to a method for using zero-valent iron to strengthen anaerobic-MFC coupled degradation of typical nitrogen-containing heterocyclic compounds. Background technique [0002] Nitrogen-containing heterocyclic compounds are an important category of refractory substances. They are not only highly toxic and difficult to degrade, but also widely distributed, and have attracted more and more attention. Quinoline and indole are two typical nitrogen-containing heterocyclic compounds. They are important substances in the organic synthesis industry. They are widely found in industrial wastewater such as coking wastewater, dye wastewater, and pharmaceutical wastewater, as well as in groundwater and soil. They are harmful to the environment. cause serious harm to living things. Because the structure contains a benzene ring and a nitrogen-containing heterocycle, they are difficult to be removed by traditional aerobic processes. The common treatm...

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Problems solved by technology

Because the structure contains a benzene ring and a nitrogen-containing heterocycle, they are difficult to be removed by traditional aerobic processes. The common treatment method is mainly to use anaerobic or anoxic denitrification process to remove, but the anaerobic method increases the processing efficiency. difficulty and cost

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