Effects of influent organic loading rates and electrode locations on the electrogenesis capacity of constructed wetland‐microbial fuel cell systems
Effects of influent organic loading rates and electrode locations on the electrogenesis capacity of constructed wetland‐microbial fuel cell systems
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DOI：
10.1002/ep.12481
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发表时间：
2017-03
影响因子：
2.8
通讯作者：
Dan Xu;enyi Xiao;Peng Xu;Yin Zhou;Qiaohong Zhou;Dong-ying Xu;Zhenbin Wu
中科院分区：
文献类型：
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作者：
Dan Xu;enyi Xiao;Peng Xu;Yin Zhou;Qiaohong Zhou;Dong-ying Xu;Zhenbin Wu
通过将MFC嵌入到CW系统中，开发了三种基于电极位置的新型人工湿地微生物燃料电池（CW-MFCs），用于废水处理和可持续发电。在3种CW-MFC中，分别将电极放置在底部阳极-根际阴极CW-MFC（BA-RC-CW-MFC）、根际阳极-空气阴极CW-MFC（RA-AC-CW-MFC）和底部阳极-空气阴极CW-MFC（BA-AC-CW-MFC）的不同位置，考察有机负荷率（OLR）和反应器配置对复合系统产电能力的综合影响。所有系统连续运行，以处理五种类型的合成废水，并增加OLR：9.2，18.4，27.6，55.2和92.0 g化学需氧量（COD）m−2 d−1。BA-RC-CW-MFC在任何OLR下都不能产生电力，而在具有18.4 g COD m-2 d-1流入OLR的RA-AC-CW-MFC和具有27.6 g COD m-2 d-1流入OLR的BA-AC-CW-MFC中分别实现了0.79 ± 0.01和10.77 ± 0.52 mW m-2的最大功率密度。随着进水OLR的增加，RA-AC-CW-MFC和BA-AC-CW-MFC的库仑效率逐渐降低。© 2016美国化学工程师学会环境规划，36：435-441，2017
Three novel constructed wetland‐microbial fuel cells (CW‐MFCs), based on electrode location, were developed for wastewater treatment and sustainable electricity production by embedding a MFC into a CW system. In the three CW‐MFCs, electrodes were placed in different locations, including bottom anode‐rhizosphere cathode CW‐MFC (BA‐RC‐CW‐MFC), rhizosphere anode‐air cathode CW‐MFC (RA‐AC‐CW‐MFC), and bottom anode‐air cathode CW‐MFC (BA‐AC‐CW‐MFC), to investigate the combined effects of organic loading rates (OLRs) and reactor configurations on the electrogenesis capacity of the hybrid system. All the systems operated continuously to treat five types of synthetic wastewater with increasing OLRs: 9.2, 18.4, 27.6, 55.2, and 92.0 g chemical oxygen demand (COD) m−2 d−1. The BA‐RC‐CW‐MFC failed to produce electricity at any OLR, whereas the maximum power densities of 0.79 ± 0.01 and 10.77 ± 0.52 mW m−2 were achieved in the RA‐AC‐CW‐MFC with 18.4 g COD m−2 d−1 influent OLR and in the BA‐AC‐CW‐MFC with 27.6 g COD m−2 d−1 influent OLR, respectively. The coulombic efficiencies of the RA‐AC‐CW‐MFC and BA‐AC‐CW‐MFC decreased gradually with the increase in influent OLRs. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 435–441, 2017