采用不同离子交换膜分离两室微生物电化学系统的启动行为。
Behavior of two-chamber microbial electrochemical systems started-up with different ion-exchange membrane separators.
机构信息
Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem ut 10, 8200 Veszprém, Hungary.
LBE, Univ Montpellier, INRA, Narbonne, France.
出版信息
Bioresour Technol. 2019 Apr;278:279-286. doi: 10.1016/j.biortech.2019.01.097. Epub 2019 Jan 23.
In this study, microbial fuel cells (MFCs) - operated with novel cation- and anion-exchange membranes, in particular AN-VPA 60 (CEM) and PSEBS DABCO (AEM) - were assessed comparatively with Nafion proton exchange membrane (PEM). The process characterization involved versatile electrochemical (polarization, electrochemical impedance spectroscopy - EIS, cyclic voltammetry - CV) and biological (microbial structure analysis) methods in order to reveal the influence of membrane-type during start-up. In fact, the use of AEM led to 2-5 times higher energy yields than CEM and PEM and the lowest MFC internal resistance (148 ± 17 Ω) by the end of start-up. Regardless of the membrane-type, Geobacter was dominantly enriched on all anodes. Besides, CV and EIS measurements implied higher anode surface coverage of redox compounds for MFCs and lower membrane resistance with AEM, respectively. As a result, AEM based on PSEBS DABCO could be found as a promising material to substitute Nafion.
在这项研究中，我们比较了使用新型阳离子交换膜和阴离子交换膜（分别为 AN-VPA 60 [CEM] 和 PSEBS DABCO [AEM]）的微生物燃料电池（MFC）与 Nafion 质子交换膜（PEM）的性能。该过程的特征涉及多种电化学（极化、电化学阻抗谱 - EIS、循环伏安法 - CV）和生物学方法（微生物结构分析），以揭示启动过程中膜类型的影响。实际上，与 CEM 和 PEM 相比，使用 AEM 可使能量产率提高 2-5 倍，并且在启动结束时 MFC 的内部电阻最低（148±17Ω）。无论膜类型如何，在所有阳极上都优先富集 Geobacter。此外，CV 和 EIS 测量表明，对于 MFC 而言，AEM 具有更高的氧化还原化合物的阳极表面覆盖率，而对于 AEM 而言，膜电阻更低。结果表明，基于 PSEBS DABCO 的 AEM 可以作为替代 Nafion 的有前途的材料。
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