Substrates and pathway of electricity generation in a nitrification-based microbial fuel cell.
Substrates and pathway of electricity generation in a nitrification-based microbial fuel cell.
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DOI：
10.1016/j.biortech.2014.02.081
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发表时间：
2014-06
影响因子：
11.4
通讯作者：
Hui Chen;P. Zheng;Jiqiang Zhang;Zuofu Xie;Jun-yuan Ji;Abbas Ghulam
中科院分区：
文献类型：
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作者：
Hui Chen;P. Zheng;Jiqiang Zhang;Zuofu Xie;Jun-yuan Ji;Abbas Ghulam
基于硝化作用的微生物燃料电池（N-MFC）是一种基于阳极室硝化作用的新型无机微生物燃料电池。到目前为止，关于N-MFC的底物和途径的信息很少。研究结果表明，除初级硝化底物（铵）外，中间产物（羟胺和亚硝酸盐）也可作为阳极燃料产生电流，而最终产物硝酸盐对电流产生有抑制作用。在此基础上，提出了N-MFC的产电途径：氨氧化菌（AOB）先将NH 4+氧化为亚硝酸盐，然后阳极液中的亚硝酸盐与阴极液中的高锰酸钾组成化学电池产生电流。换句话说，N-MFC中的发电并不像我们预期的那样仅由微生物反应支持，而是生物反应和电化学反应共同贡献。
Nitrification-based microbial fuel cell (N-MFC) is a novel inorganic microbial fuel cell based on nitrification in the anode compartment. So far, little information is available on the substrates and pathway of N-MFC. The results of this study indicated that apart from the primary nitrification substrate (ammonium), the intermediates (hydroxylamine and nitrite) could also serve as anodic fuel to generate current, and the end product nitrate showed an inhibitory effect on electricity generation. Based on the research, a pathway of electricity generation was proposed for N-MFC: ammonium was oxidized first to nitrite by ammonia-oxidizing bacteria (AOB), then the nitrite in anolyte and the potassium permanganate in catholyte constituted a chemical cell to generate current. In other words, the electricity generation in N-MFC was not only supported by microbial reaction as we expected, but both biological and electrochemical reactions contributed.