Microbial fuel cell artificial wetland device for sewage treatment and power supply to wetland

Abstract

The invention discloses a microbial fuel cell artificial wetland device for sewage treatment and power supply to wetland. The device comprises a microbial fuel cell wetland main body and a current collection and energy storage system, wherein the microbial fuel cell wetland main body sequentially comprises a seepage-prevention layer, an anode packing layer, an insulation packing layer, a cathode packing layer and aquatic plants from bottom to top; an aeration device of which the aeration quantity can be adjusted is laid at the bottom of the cathode packing layer; and the current collection and energy storage system comprises an anode electrode, a cathode electrode, an external connection wire for connecting the anode electrode with the cathode electrode, and an energy storage device and an electric energy output device which are connected in series by the external connection wire. The device integrates functions of high-efficient sewage treatment and energy generation, is low in cost, and is easy to maintain, externally applied voltage is unnecessary during the whole process, the generated electric energy can be applied to the system according to demands, and thus, sewage treatment and high-efficient cyclic utilization of resources are achieved. The device is particularly suitable for urban wetland parks.

Description

Technical field: [0001] The invention relates to the fields of sewage treatment and clean energy, in particular to a microbial fuel cell artificial wetland device that treats sewage and is used for wetland power supply. Background technique: [0002] Microbial fuel cells are devices that use microorganisms as biocatalysts to directly convert chemical energy into electrical energy. From the perspective of energy utilization and environmental protection, this technology can not only degrade organic pollutants, purify the environment, but also generate clean electricity. Therefore, it is a green energy technology with broad application prospects. This technology has broad application prospects in wastewater treatment, environmental remediation, and groundwater treatment. [0003] Constructed wetland is a comprehensive ecosystem. It applies the principles of species symbiosis and material recycling in the ecosystem, follows the principle of structure and function coordination, ...

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Problems solved by technology

Xia Shibin et al. (Xia Shibin, Wu Zhenbin, Pan Rong, A microbial fuel cell device for aquatic plant electrodes in constructed wetlands, 201110187473.3) invented a low-cost aquatic plant electrode in constructed wetlands, which adopts a staggered arrangement of cathodes and anodes. However, This way of wetland utilization efficiency is not high, and there is a lot of room for improvement in the power generation effect of batteries per unit area. Song Xinshan et al. Microbial fuel cell artificial wetland for sewage, CN 103708622 B) A microbial fuel cell artificial wetland device for efficiently treating sewage has been developed

Compared with constructed wetlands, although the above technologies can improve the sewage treatment effect, there is still a lot of room for improvement in the treatment

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