Structure for simultaneously realizing ecological sewage treatment and microbiological fuel cell electrogenesis

Abstract

The invention relates to an electrogenesis structure of a microbiological fuel cell in a sewage treatment ecological engineering technology. The electrogenesis structure comprises a constructed wetland ecological engineering main body and an MFC (Micro-Function Circuit) system formed by a part of externally-connected circuits for constructed wetland components, wherein the constructed wetland main body comprises a coarse gravel layer, a conductive filler layer, an insulating filler layer, a top conductive material layer and wetland plants; the coarse gravel layer is a lowermost layer; the conductive filler layer is in a lower anaerobic area; the insulating filler layer is positioned between the lower conductive filler layer and the top conductive material layer; the wetland plants are fixed in the insulating filler layer; the root systems of the wetland plants gradually penetrate into the lower conductive filler layer along with the growth of the wetland plants; the MFC system consists of an anodic electrode, a cathodal electrode and an external connection wire for connecting the cathode with the anode; the anode is formed by the lower conductive filler layer of the constructed wetland; the cathode is formed by the top conductive material layer of the constructed wetland; and a part of the top conductive material layer is submersed in water, and a part of the top conductive material layer is exposed in the air to form an air cathode.

Description

technical field [0001] The invention belongs to the field of energy and environmental engineering, and in particular relates to a microbial fuel cell power generation technology in sewage treatment ecological engineering, in particular to the application of microbial fuel cells in producing electric energy while purifying sewage in constructed wetlands. Background technique [0002] Microbial fuel cell (MFC) as a new way of energy production—using microorganisms to directly convert organic matter into electrical energy has received more and more research and attention. MFC is a device that uses enzymes or microorganisms as an anode catalyst to oxidize organic matter and renewable biomass to generate electricity through its metabolism. These fuel sources make MFC more advanced than chemical fuel cells that only use pure chemical reaction fuels. Studies have shown that MFC can not only degrade simple small molecular organic compounds to obtain electrical energy, but also degra...

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Problems solved by technology

At present, the research on the application of MFC in constructed wetlands has not been reported at home and abroad.

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