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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摘要在基于电极氨氧化作用的人工湿地-微生物燃料电池（CW-MFC）耦合系统中设置阳极层，探究了阳极层中不同种类填料对系统运行性能及其微生物学特征的影响.结果表明，利用电极氨氧化型CW-MFC处理生活污水时，阳极层中填料的理化特性可显著影响电活性氨氧化生物膜中的微生物群落结构及功能微生物数量，进而会造成装置脱氮产电性能的差异.相较于石英砂和沸石，当选用废砖块作为阳极层填料时，其较大的比表面积、较高的EC值及Fe含量提高了参与电极氨氧化反应的功能微生物（尤其是Nitrosomonas、Geobacter、Empodebacter和Candidutus Brocadia）的丰度及活性，CW-MFC中的电极氨氧化作用随之得以强化，其运行性能亦较理想，此时系统的COD、TP、TN和NH₄⁺-N去除率分别可达（87.29±2.06）%、（92.52±3.20）%、（87.10±2.27）%和（96.49±0.76）%，其输出功率密度峰值为0.60W/m³，出水水质满足《城镇污水处理厂污染物排放标准》（GB 18918-2002）一级A标准.

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关键词 ：人工湿地-微生物燃料电池(CW-MFC), 填料, 电极氨氧化, 生物电化学, 脱氮

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

收稿日期: 2023-03-22

PACS:

X703

基金资助:国家自然科学基金项目（52370160）；安徽省自然科学基金资助项目（2008085ME162）；安徽省高等学校科学研究项目（2022AH040121）；山东省自然科学青年基金项目（ZR2021QE109）；山东省高等学校青年创新团队人才引育计划“固体废物污染控制与资源化创新团队”（2021）

通讯作者: 王振,副教授,zwang@ahau.edu.cn E-mail: zwang@ahau.edu.cn

作者简介: 范洪勇(1987-),男,山东泰安人,副教授,博士,主要从事废弃物资源化技术研究.发表论文20余篇.fanhongyong2012@163.com.

引用本文:

范洪勇, 王华伟, 潘玲阳, 储刚, 孙英杰, 王振. 填料对电极氨氧化型CW-MFC耦合系统运行性能的影响[J]. 中国环境科学, 2023, 43(11): 5833-5844. FAN Hong-yong, WANG Hua-wei, PAN Ling-yang, CHU Gang, SUN Ying-jie, WANG Zhen. Effect of filter medium on operational performance of a constructed wetland-microbial fuel cell system based on electrode dependent ammonium oxidation. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5833-5844.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2023/V43/I11/5833

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