Two segment type biological fuel cell

Abstract

The invention discloses a two-section type microbiological fuel cell which comprises a cathode chamber and an anode chamber, wherein a cathode is inserted in the cathode chamber, an anode is inserted in the anode chamber, an aerobic microorganism culture medium is arranged in the cathode chamber, and an aerobic microorganism film is hung on the surface of the cathode. The two-stage sewage treatment process is combined with the electric power generation process to cause the waste water to be thoroughly degraded by adopting the two-step anaerobic and aerobic process; in addition, the electrochemical activity of the aerobic microorganism is taken as the cathode microbial agent, and oxygen gas is taken as the electron acceptor, therefore, the continuous electric power generation is realized, the current density is improved, the cost of the conventional cathode catalyst is reduced, and the sewage water BOD can be tested by using the cathode aerobic microorganism; the invention has the advantages that the process structure is simple, the operation is easy, the latent electrical energy in the sewage water is 10 times of the processing cost of the sewage water, and the sewage treatment plant can solve the problem of cost of sewage treatment by utilizing 1/20 of the latent electrical energy.

Description

technical field [0001] The invention relates to a two-stage microbial fuel cell, in particular to an electricity generating device for treating sewage containing high COD. Background technique [0002] Microbial fuel cell is a device that uses the electrochemical activity of microorganisms as a catalyst to directly convert the chemical energy of organic substances into electrical energy. Its energy conversion efficiency reaches 80%. It is a new technology that organically combines sewage treatment and power generation. In the known microbial fuel cell, sewage is injected into the anode chamber, anaerobic microorganisms disposed in the anode chamber degrade organic substances, and chemical substances with high redox potential are used as electron acceptors in the cathode chamber, such as oxygen, potassium ferricyanide, high Potassium manganate and other solutions, under the action of metal catalysts such as Pt, undergo a reduction reaction and form a closed loop. The cathode...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to overcome the problem that existing microbial fuel cells cannot effectively degrade sewage containing high COD such as N and P, and cannot reduce the construction cost of microbial fuel cells, and provide a microbial fuel cell device, which can not only realize the The anaerobic and aerobic two-step process completely reduces COD and meets the requirements of sewage treatment, and uses aerobic microorganisms or enzymes as cathode catalysts instead of conventional metal catalysts, which reduces battery costs; realizes continuous power generation, and uses multiple anodes at the same time, Increase current density

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