A Wastewater Treatment System Combining Constructed Wetland and Microbial Fuel Cell

Abstract

A constructed wetland and microbial fuel cell combined sewage treatment system consists of a microbial fuel cell, constructed wetland plants and an external circuit, wherein the microbial fuel cell comprises a reactor housing, organic glass sheets, rolling cathodes and rolling anodes. The microbial fuel cell produces electricity, microorganisms degrade organic substance through self metabolism, and electric energy is produced in situ to drive a water pump so as to complete sewage treatment. A plant purification function and the microbial fuel cell are combined, root exudates of the plants are utilized for the first time, a constructed wetland is simulated through photosynthesis of the plants to treat sewage, and meanwhile electricity production is achieved. The constructed wetland and microbial fuel cell combined sewage treatment system has the advantages that wastes are recycled, resource utilization rate is improved, no carbon is discharged, the constructed wetland and microbial fuel cell combined sewage treatment system is a 'self-sufficiency' green environment-friendly sustainable technology and is hopeful to be applied to sewage treatment plants in a large-scale mode.

Description

technical field [0001] The invention relates to a method for treating sewage, in particular to a sewage treatment system combining artificial wetlands and microbial fuel cells. Background technique [0002] At present, the traditional method of treating domestic wastewater at home and abroad is the biochemical method, because the domestic sewage BOD5 / CODcr ≈0.5 has strong biochemical properties, and the two widely used methods are the activated sludge method and the biofilm method. The activated sludge method has the advantages of high processing capacity and good effluent quality, but at the same time, there are common problems such as high operating costs, high energy consumption, sludge bulking, and sludge floating; although the biofilm method has high processing efficiency and impact resistance The load performance is good, and the sludge production is low compared with the activated sludge method, but it is also restricted by the energy consumption problem. In addition...

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Problems solved by technology

The activated sludge process has the advantages of high processing capacity and good effluent quality, but at the same time there are common problems such as high operating costs, high energy consumption, sludge bulking, and sludge floating; although the biofilm process has high processing efficiency and impact resistance Good load performance, low sludge production compared with activated sludge process, but also restricted by energy consumption

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