An Evaluation of the Performance and Economics of Membranes and Separators in Single Chamber Microbial Fuel Cells Treating Domestic Wastewater.
An Evaluation of the Performance and Economics of Membranes and Separators in Single Chamber Microbial Fuel Cells Treating Domestic Wastewater.
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DOI：
10.1371/journal.pone.0136108
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Curtis TP
中科院分区：
文献类型：
--
作者：
Christgen B;Scott K;Dolfing J;Head IM;Curtis TP
材料成本是废水驱动微生物燃料电池（MFC）的最大障碍之一。许多研究使用昂贵的材料和理想化的废物。实际上，离子选择性膜或非特异性分离器的选择必须在可用材料的成本和性能的背景下进行。对14种膜和隔板的耐久性、氧扩散和离子阻力进行了表征，以便为反应器测试选择明智的膜。随后，MFC操作在一个具有成本效益的反应器设计，使用全氟磺酸，乙烯聚偏二氟乙烯（ETFE）或聚偏二氟乙烯（PVDF）膜，一个非特定的分离器（Rhinohide），和无膜设计与碳纸内部气体扩散阴极。极化过程中，使用无膜，Nafion和ETFE的MFC的峰值功率密度分别达到67，61和59 mWm-2，库仑效率分别为68± 11%，71±12%和92± 6%。在1000Ω下，Nafion和ETFE实现了29 mWm-2的平均功率密度，而无膜反应器为24 mWm-2。在10年的假设寿命内，产生的能量（1至2.5 kWhm-2）将不足以抵消任何测试的膜和分离器的成本。
The cost of materials is one of the biggest barriers for wastewater driven microbial fuel cells (MFCs). Many studies use expensive materials with idealistic wastes. Realistically the choice of an ion selective membrane or nonspecific separators must be made in the context of the cost and performance of materials available. Fourteen membranes and separators were characterized for durability, oxygen diffusion and ionic resistance to enable informed membrane selection for reactor tests. Subsequently MFCs were operated in a cost efficient reactor design using Nafion, ethylene tetrafluoroethylene (ETFE) or polyvinylidene fluoride (PVDF) membranes, a nonspecific separator (Rhinohide), and a no-membrane design with a carbon-paper internal gas diffusion cathode. Peak power densities during polarisation, from MFCs using no-membrane, Nafion and ETFE, reached 67, 61 and 59 mWm-2, and coulombic efficiencies of 68±11%, 71±12% and 92±6%, respectively. Under 1000Ω, Nafion and ETFE achieved an average power density of 29 mWm-2 compared to 24 mWm-2 for the membrane-less reactors. Over a hypothetical lifetime of 10 years the generated energy (1 to 2.5 kWhm-2) would not be sufficient to offset the costs of any membrane and separator tested.