Itoshiro Ryoya, Yoshida Naoko, Yagi Toshiyuki, Kakihana Yuriko, Higa Mitsuru
Department of Civil Engineering, Nagoya Institute of Technology (Nitech), Nagoya 466-8555, Japan.
Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida, Yamaguchi 753-8511, Japan.
Membranes (Basel). 2022 Feb 3;12(2):183. doi: 10.3390/membranes12020183.
This study compared the performance of two microbial fuel cells (MFCs) equipped with separators of anion or cation exchange membranes (AEMs or CEMs) for sewage wastewater treatment. Under chemostat feeding of sewage wastewater (hydraulic retention time of approximately 7 h and polarization via an external resistance of 1 Ω), the MFCs with AEM (MFC) generated a maximum current that was 4-5 times greater than that generated by the MFC with CEM (MFC). The high current in the MFC was attributed to the approximately neutral pH of its cathode, in contrast to the extremely high pH of the MFC cathode. Due to the elimination of the pH imbalance, the cathode resistance for the MFC (13-19 Ω·m) was lower than that for the MFC (41-44 Ω·m). The membrane resistance measured as the Cl mobility of AEMs for the MFC operated for 35, 583, and 768 days showed an increase with operation time and depth, and this increase contributed minimally to the cathode resistance of the MFC. These results indicate the advantage of the AEM over the CEM for air-cathode MFCs. The membrane resistance may increase when the AEM is applied in large-scale MFCs on a meter scale for extended periods.
本研究比较了配备阴离子或阳离子交换膜（AEMs或CEMs）分离器的两种微生物燃料电池（MFCs）处理污水废水的性能。在恒化器进料污水废水（水力停留时间约7小时，通过1Ω的外部电阻极化）的条件下，配备AEM的MFC（MFC）产生的最大电流比配备CEM的MFC（MFC）产生的最大电流大4至5倍。MFC中的高电流归因于其阴极的pH值接近中性，这与MFC阴极的极高pH值形成对比。由于消除了pH不平衡，MFC的阴极电阻（13 - 19Ω·m）低于MFC的阴极电阻（41 - 44Ω·m）。以运行35、583和768天的MFC的AEM的Cl迁移率测量的膜电阻随运行时间和深度增加，且这种增加对MFC的阴极电阻贡献极小。这些结果表明AEM相对于CEM在空气阴极MFC中的优势。当AEM长时间应用于米级规模的大型MFC时，膜电阻可能会增加。
