Ebrahimi Atieh, Yousefi Kebria Daryoush, Najafpour Darzi Ghasem
Environmental Engineering Department, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Shariati Avenue, Babol Iran, 47148-71167 E-mail:
Biotechnology Research Lab, Department of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran.
Water Sci Technol. 2017 Sep;76(5-6):1206-1214. doi: 10.2166/wst.2017.280.
The microbial desalination cell (MDC) is known as a newly developed technology for water and wastewater treatment. In this study, desalination rate, organic matter removal and energy production in the reactors with and without desalination function were compared. Herein, a new design of plain graphite called roughened surface graphite (RSG) was used as the anode electrode in both microbial fuel cell (MFC) and MDC reactors for the first time. Among the three type of anode electrodes investigated in this study, RSG electrode produced the highest power density and salt removal rate of 10.81 W/m and 77.6%, respectively. Such a power density was 2.33 times higher than the MFC reactor due to the junction potential effect. In addition, adding the desalination function to the MFC reactor enhanced columbic efficiency from 21.8 to 31.4%. These results provided a proof-of-concept that the use of MDC instead of MFC would improve wastewater treatment efficiency and power generation, with an added benefit of water desalination. Furthermore, RSG can successfully be employed in an MDC or MFC, enhancing the bio-electricity generation and salt removal.
微生物脱盐电池（MDC）是一种新开发的用于水和废水处理的技术。在本研究中，对具有和不具有脱盐功能的反应器中的脱盐率、有机物去除率和能量产生进行了比较。在此，一种名为粗糙表面石墨（RSG）的新型普通石墨设计首次被用作微生物燃料电池（MFC）和MDC反应器中的阳极电极。在本研究中研究的三种阳极电极中，RSG电极产生的最大功率密度和脱盐率分别为10.81 W/m²和77.6%。由于结电位效应，这种功率密度比MFC反应器高2.33倍。此外，在MFC反应器中增加脱盐功能可将库仑效率从21.8%提高到31.4%。这些结果提供了一个概念验证，即使用MDC而非MFC将提高废水处理效率和发电能力，同时还具有水脱盐的额外益处。此外，RSG可成功应用于MDC或MFC中，提高生物电产生和盐分去除效果。
