填料对电极氨氧化型CW-MFC耦合系统运行性能的影响

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Abstract An anodic layer was installed in a constructed wetland-microbial fuel cell (CW-MFC) system based on electrode dependent ammonium oxidation, and this study was conducted to explore the operational performances and the associated microbial characteristics of the CW-MFCs as different kinds of filter media were introduced into their anodic layers. The results showed that, as the CW-MFC based on electrode dependent ammonium oxidation was adopted to treat domestic sewage, physicochemical properties of filter medium filled in the anodic layer could significantly affect microbial community structure of the electroactive ammonium oxidation biofilm and quantities of the associated functional microorganisms in the biofilm, leading to differences of nitrogen removal and electricity generation among the three devices. Compared with quartz sand and zeolite, broken bricks had lager specific surface area, higher EC value and Fe content, resulting that quantities and activities of the functional microbes involved in electrode dependent ammonium oxidation were increased in the CW-MFC filled broken bricks into the anodic layer. Correspondingly, electrode dependent ammonium oxidation was enhanced in the CW-MFC, and operational performance of the system could also be optimized. Regarding to the CW-MFC filled broken bricks into the anodic layer, its COD, TP, TN and NH₄⁺-N removal rates could respectively reached up to (87.29±2.06)%, (92.52±3.20)%, (87.10±2.27)%, and (96.49±0.76)% during the stable operation phase, as well as the maximum power density of 0.60W/m³, effluent quality of the system could reach Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) class A standard.

Key words： constructed wetland-microbial fuel cell (CW-MFC) filter medium electrode dependent ammonium oxidation bioelectrochemistry nitrogen removal

Received: 22 March 2023

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X703

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	Articles by authors
	FAN Hong-yong
	WANG Hua-wei
	PAN Ling-yang
	CHU Gang
	SUN Ying-jie
	WANG Zhen

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FAN Hong-yong,WANG Hua-wei,PAN Ling-yang等. Effect of filter medium on operational performance of a constructed wetland-microbial fuel cell system based on electrode dependent ammonium oxidation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5833-5844.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5833

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