不同运行方式对多阳极型微生物燃料电池反硝化及产电性能的影响

doi:10.16085/j.issn.1000-6613.2017-2330

摘要/Abstract

摘要： 利用多阳极型微生物燃料电池（multi-anode microbial fuel cell，MA-MFC）实现生物阴极反硝化过程，分别考察了阴极和多阳极之间不同连接方式、开路或闭路状态、阴极是否存在碳源以及电阻值的大小对MA-MFC的产电性能及反硝化过程的影响。当MA-MFC的阴极存在碳源时，闭路状态下15天内的硝酸盐氮去除率为64.35%，明显高于开路状态下同样时间内的硝酸盐氮去除率（45.89%）。当MA-MFC的阴极不存在碳源时，闭路状态下15天内的硝酸盐氮去除率为17.49%，而开路状态下的硝酸盐氮浓度没有变化。此外，MA-MFC采用并联方式运行时的产电性能和硝酸盐氮去除速率比采用串联方式运行时大幅提高。而在外电阻为100Ω时，MA-MFC在串联或并联状态下均能够达到最高的硝酸盐氮去除率及较高的产电性能。综合上述条件，发现当MA-MFC处于闭路状态、采用并联方式运行、阴极无碳源以及外电阻为100Ω时，能够实现最佳的硝酸盐氮去除率和最大输出功率，分别为94.21%、2.07W/m³。

关键词: 多阳极, 微生物燃料电池, 反硝化, 生物阴极

Abstract: Denitrification was carried out in the biocathode of a multi-anode microbial fuel cell (MA-MFC). The denitrification performance and electricity production were evaluated under different operation modes, such as connection modes between anodes and cathode, open or closed circuit, electrical resistance and with or without carbon resources in the cathode. With the carbon resource in the cathode, the removal rate of nitrate was 64.35% during 15 days in a closed circuit of MA-MFC, which was much higher than that in open circuit (45.89%). Without the carbon resource in the cathode, the removal rate of nitrate was 17.49% during 15 days in closed circuit of MA-MFC, but the concentration of nitrate remained stable in the open circuit. The electricity production and the removal rate of nitrate in the parallel operation of MA-MFC was increased greatly than that in the serial operation. And at an external electrical resistance of 100Ω, the MA-MFC reached the optimal nitrate removal rate and electricity production, both in the parallel and serial operations. Hence, an optimal nitrate removal rate of 94.21% and a maximum power density of 2.07W/m³ were reached in closed circuit of the MA-MFC, without the carbon resource in the cathode and connected with the external electrical resistance of 100Ω.

Key words: multi-anode, microbial fuel cell, denitrification, biocathode

中图分类号:

X703

顾霞, 黄珊, 陆圆, 孔赟, 朱光灿, 陆勇泽. 不同运行方式对多阳极型微生物燃料电池反硝化及产电性能的影响[J]. 化工进展, 2018, 37(10): 3818-3825.

GU Xia, HUANG Shan, LU Yuan, KONG Yun, ZHU Guangcan, LU Yongze. Influence of different operating modes on denitrification and electricity generation in a multi-anode microbial fuel cell[J]. Chemical Industry and Engineering Progress, 2018, 37(10): 3818-3825.

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