Air cathode microbial fuel cell constructed wetland device of biological carbon matrix anode

Abstract

The invention discloses an air cathode microbial fuel cell constructed wetland device of a biological carbon matrix anode. The upper layer of the constructed wetland is an aerobic zone, the lower layer of the constructed wetland is an anoxic zone; the aerobic zone and the anoxic zone are respectively provided with a cathode electrode and a biological carbon matrix anode electrode; waste water enters the anoxic zone through a water supply system and an inflowing water distribution pipe; electrons and protons are generated by oxidizing organic matters by microorganisms; the electrons are transmitted to the cathode electrode of the upper aerobic zone by the biological carbon matrix anode electrode of the lower anoxic zone through an external circuit; the protons are transmitted to the aerobic zone through a packing medium; the protons are diffused to the aerobic zone through a solution to combine with the electrons and oxygen gas so as to generate water; finally, after being cleaned by the microorganisms in the upper aerobic zone, the waste water flows to a water drainage system through an outflow water collecting pipe. The constructed wetland device disclosed by the invention can efficiently remove organic matters, increase the generated power, and effectively improve water quality and pH value. The constructed wetland is various in organisms, good in processing effect, low in running and maintaining costs, energy saving and environment friendly.

Description

technical field [0001] The invention relates to an artificial wetland of an air cathode microbial fuel cell with a biochar matrix anode, and belongs to the technical field of electrochemistry and sewage treatment coupling. Background technique [0002] As part of the urban sewage treatment process, constructed wetlands have obvious buffering capacity for various sewage and wastewater treatment processes. The vertical flow constructed wetland has higher oxygen transport capacity and nitrification capacity, and has a better removal effect on oxygen-consuming organic matter in sewage. In addition, by setting the residence time reasonably, the vertical flow constructed wetland can realize the conditions of hypoxia in the lower part and aerobic conditions in the upper part, resulting in different redox potentials in the upper and lower parts. Therefore, the vertical flow constructed wetland has the potential to transform its structure into a microbial fuel Potential of Battery C...

AI Technical Summary

Problems solved by technology

However, the significant reduction of microbial diversity in acidic or weakly acidic wastewater is still an urgent obstacle to be overcome.

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