Effect of cathode types on long-term performance and anode bacterial communities in microbial fuel cells
Journal
Bioresource Technology
Journal Volume
118
Pages
249-256
Date Issued
2012
Author(s)
Abstract
Effects of cathode types on the long-term stability of microbial fuel cell (MFC) and the anodic microbial communities were studied using K 3Fe(CN) 6 catholyte (R1), air cathode (R2) and biocathode (R3) over a testing time of 400d. Upon 400d of testing, the maximum power densities (P max) of R1 and R2 decreased by 44% and 37%, and the Coulombic efficiencies (CEs) decreased 8.4% (R1) and 2.0% (R2), respectively, using the performances on 10d as the comparison basis. Conversely, the P max and CE of R3 increased by 68.2% and 116.8%, respectively. The non-ohmic resistances (R no) in all tests were the principal contributors of cell internal resistances. Phylogenetic analyses revealed that the microbial communities on anodic surface varied with cathode types and operational history. ? 2012 Elsevier Ltd.
Subjects
Biocathode
Cathode type
Long-term performance
Microbial community
Microbial fuel cells
SDGs
Type
journal article