Damiano Lisa, Jambeck Jenna R, Ringelberg David B
University of New Hampshire, Durham, NH, 03824, USA.
Appl Biochem Biotechnol. 2014 May;173(2):472-85. doi: 10.1007/s12010-014-0854-x. Epub 2014 Mar 27.
Microbial fuel cells were designed and operated to treat landfill leachate while simultaneously producing electricity. Two designs were tested in batch cycles using landfill leachate as a substrate without inoculation (908 to 3,200 mg/L chemical oxygen demand (COD)): Circle (934 mL) and large-scale microbial fuel cells (MFC) (18.3 L). A total of seven cycles were completed for the Circle MFC and two cycles for the larger-scale MFC. Maximum power densities of 24 to 31 mW/m(2) (653 to 824 mW/m(3)) were achieved using the Circle MFC, and a maximum voltage of 635 mV was produced using the larger-scale MFC. In the Circle MFC, COD, biological oxygen demand (BOD), total organic carbon (TOC), and ammonia were removed at an average of 16%, 62%, 23%, and 20%, respectively. The larger-scale MFC achieved an average of 74% BOD removal, 27% TOC removal, and 25% ammonia reduction while operating over 52 days. Analysis of the microbial characteristics of the leachate indicates that there might be both supportive and inhibiting bacteria in landfill leachate for operation of an MFC. Issues related to scale-up and heterogeneity of a mixed substrate remain.
设计并运行了微生物燃料电池来处理垃圾渗滤液，同时产生电能。使用垃圾渗滤液作为底物（化学需氧量（COD）为908至3200mg/L），在未接种的情况下，以批次循环的方式测试了两种设计：圆形（934mL）和大型微生物燃料电池（MFC）（18.3L）。圆形MFC总共完成了七个循环，大型MFC完成了两个循环。使用圆形MFC时，最大功率密度达到24至31mW/m²（653至824mW/m³），使用大型MFC时产生的最大电压为635mV。在圆形MFC中，COD、生物需氧量（BOD）、总有机碳（TOC）和氨的去除率分别平均为16%、62%、23%和20%。大型MFC在运行52天期间，BOD平均去除率达到74%，TOC去除率为27%，氨减少了25%。对渗滤液微生物特性的分析表明，垃圾渗滤液中可能存在对MFC运行既有支持作用又有抑制作用的细菌。与混合底物的放大和异质性相关的问题仍然存在。
