A kind of three-dimensional anode electrode and its applied microbial fuel cell and starting method

Abstract

The invention discloses a three-dimensional anode electrode and a microbial fuel cell and a starting method thereof. The microbial fuel cell includes a pool body, a sewage pump, a catholyte pump and a catholyte tank. The cell body includes an anode cavity and a cathode cavity and a cation exchange membrane. A three-dimensional anode electrode including a three-dimensional layered base layer and several extension layers is arranged in the anode chamber, and the base layer is arranged close to the cation exchange membrane. Anode circuit lines are arranged between the extension layers. A catholyte circulation is formed between the catholyte tank and the cathode cavity. The cathode cavity is provided with a cathode electrode, and the cathode electrode is selected from carbon rods or carbon brushes or includes at least two metal meshes connected to each other through titanium sheets, and granular activated carbon is filled between the metal meshes. In the start-up process, anaerobic sludge is injected into the anode cavity to realize the inoculation, cultivation, enrichment and domestication of microorganisms in the base layer and extension layer, and realize electricity production. The three-dimensional anode electrode structure of the invention is beneficial to electron collection and transmission, and has the advantages of good electricity production effect, simple structure, convenient manufacture and the like.

Description

technical field [0001] The invention relates to a three-dimensional anode electrode, a microbial fuel cell and a starting method thereof, and belongs to the technical field of fuel cells. Background technique [0002] With the continuous development of society and economy, people's demand for traditional fossil fuels continues to increase. However, the limited use of fossil fuels and their limited storage have led to the continuous aggravation of the energy crisis. Therefore, people's demand for new energy is constantly pressing. At the same time, the aggravation of environmental pollution has also caused difficulties in people's daily life. How to find effective solutions to environmental pollution and convert pollutants into renewable energy will play an important role in solving the energy crisis. [0003] Microbial fuel cell technology (MFC) is a new technology that combines sewage treatment and biological electricity generation. This function of simultaneously realiz...

AI Technical Summary

Problems solved by technology

However, for three-dimensional dispersed filled electrode particles, such as granular activated carbon, due to the large electrode area and small porosity, the surface of carbon particles is easily wrapped by biofilm, and it is difficult to contact each other, which affects electron transfer.

Although carbon brushes can integrate titanium rods and carbon fiber electrode materials to integrate the electrode surface into a whole to ensure electron transfer, the proportion of carbon fiber hairs filling the anode cavity is limited, and there are gaps with the cation exchange membrane, which ultimately increases the mass transfer resistance. , increase the internal resistance of the system and limit the electrochemical activity

The above problems have hindered the application and promotion of microbial fuel cells.

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