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dc.contributor.authorZhu, Xiuping
dc.contributor.authorYates, Matthew D.
dc.contributor.authorHatzell, Marta C.
dc.contributor.authorRao, Hari Ananda
dc.contributor.authorSaikaly, Pascal
dc.contributor.authorLogan, Bruce E.
dc.date.accessioned2015-08-03T11:46:16Z
dc.date.available2015-08-03T11:46:16Z
dc.date.issued2014-01-21
dc.identifier.issn0013936X
dc.identifier.pmid24364567
dc.identifier.doi10.1021/es404690q
dc.identifier.urihttp://hdl.handle.net/10754/563345
dc.description.abstractThere is great controversy on how different set anode potentials affect the performance of a bioelectrochemical system (BES). It is often reported that more positive potentials improve acclimation and performance of exoelectrogenic biofilms, and alter microbial community structure, while in other studies relatively more negative potentials were needed to achieve higher current densities. To address this issue, the biomass, electroactivity, and community structure of anodic biofilms were examined over a wide range of set anode potentials (-0.25, -0.09, 0.21, 0.51, and 0.81 V vs a standard hydrogen electrode, SHE) in single-chamber microbial electrolysis cells. Maximum currents produced using a wastewater inoculum increased with anode potentials in the range of -0.25 to 0.21 V, but decreased at 0.51 and 0.81 V. The maximum currents were positively correlated with increasing biofilm biomass. Pyrosequencing indicated biofilm communities were all similar and dominated by bacteria most similar to Geobacter sulfurreducens. Differences in anode performance with various set potentials suggest that the exoelectrogenic communities self-regulate their exocellular electron transfer pathways to adapt to different anode potentials. © 2013 American Chemical Society.
dc.description.sponsorshipThis research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST). The authors also want to thank the three anonymous reviewers for their constructive comments on the original manuscript.
dc.publisherAmerican Chemical Society (ACS)
dc.titleMicrobial community composition is unaffected by anode potential
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentEnvironmental Biotechnology Research Group
dc.identifier.journalEnvironmental Science & Technology
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA 16802, United States
kaust.personSaikaly, Pascal
kaust.personRao, Hari Ananda


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