Microbial fuel battery with air-breathable biological cathode

A biocathode and fuel cell technology, applied in the direction of biochemical fuel cells, fuel cell components, etc., can solve problems affecting the performance of biocathode, reduce aeration costs, increase operating costs, etc., to achieve the convenience of acquisition, basic and operating costs The effect of reducing and saving operating costs

Inactive Publication Date: 2013-02-06
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the currently reported biocathode MFC, oxygen is mainly provided in the form of aeration, which increases its operating cost; in the open biocathode MFC, oxygen enters the biofilm by active diffusion, which can reduce aeration. The cost brought by the gas, but it is easy to generate a dissolved oxygen gradient inside the biofilm, which affects the performance of the biocathode

Method used

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  • Microbial fuel battery with air-breathable biological cathode
  • Microbial fuel battery with air-breathable biological cathode
  • Microbial fuel battery with air-breathable biological cathode

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Embodiment

[0015] Embodiment: the present embodiment is a kind of air-breathing bio-cathode dual-chamber microbial fuel cell. The anode includes carbon cloth, and the cathode includes PTFE and carbon powder modified carbon cloth. The side of the carbon cloth in contact with the catholyte is attached with an aerobic microbial film (1), and oxygen penetrates into the cathode biofilm through the opening baffle (2). , as the electron acceptor of the biocathode. There is an external resistor in the circuit, and the output voltage is automatically recorded into the computer through a data collector (Keithley Intruments Inc., USA).

[0016] Anolyte is KH 2 PO 4 6.28g / L,K 2 HPO 4 10.08 g / L, NaHCO 3 2.0 g / L, NaCl 0.5 g / L, NaCl 2 SO 4 0.5 g / L, MgSO 4 .7H 2 O 0.2 g / L, NaAc 0.82 g / L, except that sodium acetate is not added to the catholyte, other components are the same as the anolyte.

[0017] Maintain an anaerobic environment in the anode chamber, change the external resistance when...

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Abstract

The invention discloses a microbial fuel battery with an air-breathable biological cathode. The microbial fuel battery with the air-breathable biological cathode comprises an anode chamber inoculated with anaerobic activated sludge and a cathode chamber inoculated with an aerobic biological cathode, which are partitioned by a cation exchange membrane, wherein an anode is arranged inside the anode chamber; a cathode is fixed on a reactor through an opening baffle plate to form the cathode chamber; aerobic microbes are adhered to the surface of the cathode to form the biological cathode; the other surface of the biological cathode is communicated with air so as to permeate oxygen into a cathode electrolyte to supply electron donors to the biological cathode; anodic microbes catabolize an organic matter to generate electrons; the electrons move to the biological cathode through an external circuit; and under the action of the microbes, oxygen reacts with the electrons and protons penetrating through the anode to generate water and electrical energy. Increase of operating cost by mechanical aeration can be avoided; and the microbes replace a noble metal catalyst for oxygen reduction, so that the construction cost of the microbial fuel battery is reduced and a relatively high electrical energy density is provided.

Description

technical field [0001] The invention relates to an air-breathing biocathode microbial fuel cell. The permeated air provides sufficient oxygen as an electron acceptor of the biocathode, and belongs to the technical field of green bioenergy. Background technique [0002] The traditional biocathode microbial fuel cell (Microbial Fuel Cell, MFC) consists of an anode chamber and a cathode chamber, which are separated by an ion exchange membrane. The electricity generation process is that the anode microorganisms anaerobically degrade organic matter to generate electrons, protons and carbon dioxide; electrons are transmitted to the anode and reach the biocathode through the external circuit load, and the protons pass through the ion exchange membrane from the anode chamber to the cathode chamber; the cathode chamber electron acceptor (in the form of O 2 For example) under the action of cathode microorganisms, electrons and protons are reduced to water, thereby generating electric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16H01M8/02
CPCY02E60/527Y02E60/50
Inventor 王泽杰赵峰
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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