Double-drum microbial fuel cell

Abstract

The fuel cell is composed of outer tube, inner tube, even water distributor, filler, graphite, graphite rod, and load etc. Anode chamber is surrounded by outer tube and inner tube. Sewage enters into anode chamber from the even water distributor, and flows to cathode chamber through diversion trench. Being filled to the outer tube, the filler is as carrier for microbe. Being pasted on inner wall of the outer tube, flexible graphite is in use for collecting anode current. Graphite rod setup inside cathode chamber is in use for collecting cathode current. Graphite rod, flexible graphite, and load constitute external circuit. The invention is suitable to degrading organic wastewater in high concentration, and generating electricity, or cleansing domestic sewage. The fuel cell is suitable to continuous running for long-term. Features are: low cost, low internal resistance, large capacity for generating electricity and capable of denitrifying at same time.

Description

technical field [0001] The invention relates to a double-tube microbial fuel cell, in particular to the structural design of a microbial fuel cell device, and belongs to the technical field of domestic and industrial water treatment. Background technique [0002] Microbial fuel cell (MFC for short) is a special fuel cell that uses microorganisms as biocatalysts to directly convert the chemical energy of fuel into electrical energy. It is applied in the field of sewage treatment and integrates electricity production and sewage purification. One, has a very bright and attractive application prospects. [0003] Chinese patent application "Microbial Fuel Cell" 200410066753.9, "Method and Device for Detecting Toxic Substances in Water Using Microbial Fuel Cell" 03807769.8, "Membrane-Free and Mediator-Free Microbial Fuel Cell" 03813043.2, and "A Microbial Fuel Cell" 200420090582.9. [0004] The above patents have the following problems in the actual sewage treatment process: [...

AI Technical Summary

Problems solved by technology

[0005] 1. The use of precious metal Pt leads to expensive reactors, and there is an urgent need to replace catalysts;

[0006] 2. The purification of sewage by microbial fuel cells is limited to the degradation of carbon-containing organic matter by electrogenic bacteria in the anode chamber, and cannot degrade nitrogen, and the sewage purification is not thorough;

[0007] 3. The internal resistance of the reactor is large, and the power generation capacity is low;

[0008] 4. Using sheet electrodes, the biomass content is low, and its structure is not suitable for large-scale construction

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