Instituto de Astronomía y Física del Espacio (IAFE), University of Buenos Aires-CONICET, Ciudad Universitaria, Argentina.
Extremophiles. 2011 Nov;15(6):633-42. doi: 10.1007/s00792-011-0394-z. Epub 2011 Sep 6.
In this work, two archaea microorganisms (Haloferax volcanii and Natrialba magadii) used as biocatalyst at a microbial fuel cell (MFC) anode were evaluated. Both archaea are able to grow at high salt concentrations. By increasing the media conductivity, the internal resistance was diminished, improving the MFC's performance. Without any added redox mediator, maximum power (P (max)) and current at P (max) were 11.87/4.57/0.12 μW cm(-2) and 49.67/22.03/0.59 μA cm(-2) for H. volcanii, N. magadii and E. coli, respectively. When neutral red was used as the redox mediator, P (max) was 50.98 and 5.39 μW cm(-2) for H. volcanii and N. magadii, respectively. In this paper, an archaea MFC is described and compared with other MFC systems; the high salt concentration assayed here, comparable with that used in Pt-catalyzed alkaline hydrogen fuel cells, will open new options when MFC scaling up is the objective necessary for practical applications.
在这项工作中，我们评估了两种古菌微生物（盐生盐杆菌和盐沼盐球菌）作为微生物燃料电池（MFC）阳极中的生物催化剂的效果。这两种古菌都能够在高盐浓度下生长。通过增加介质的电导率，可以降低内阻，从而提高 MFC 的性能。在没有添加任何氧化还原介体的情况下，盐生盐杆菌、盐沼盐球菌和大肠杆菌的最大功率（P(max)）和最大功率时的电流（I(max)）分别为 11.87/4.57/0.12 μW/cm(-2)和 49.67/22.03/0.59 μA/cm(-2)。当使用中性红作为氧化还原介体时，盐生盐杆菌和盐沼盐球菌的最大功率分别为 50.98 和 5.39 μW/cm(-2)。本文描述了一种古菌 MFC，并与其他 MFC 系统进行了比较；本文中所测试的高盐浓度与 Pt 催化碱性氢燃料电池中使用的盐浓度相当，这将为 MFC 的放大提供新的选择，这是实际应用中必要的。
