Fully reversible current driven by a dual marine photosynthetic microbial community

Darus, Libertus, Lu, Yang, Ledezma, Pablo, Keller, Jurg and Freguia, Stefano (2015) Fully reversible current driven by a dual marine photosynthetic microbial community. Bioresource Technology, 195 248-253. doi:10.1016/j.biortech.2015.06.055


Author Darus, Libertus
Lu, Yang
Ledezma, Pablo
Keller, Jurg
Freguia, Stefano
Title Fully reversible current driven by a dual marine photosynthetic microbial community
Journal name Bioresource Technology   Check publisher's open access policy
ISSN 1873-2976
0960-8524
Publication date 2015-11
Sub-type Article (original research)
DOI 10.1016/j.biortech.2015.06.055
Volume 195
Start page 248
End page 253
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
The electrochemical activity of two seawater microbial consortia were investigated in three-electrode bioelectrochemical cells. Two seawater inocula – from the Sunshine Coast (SC) and Gold Coast (GC) shores of Australia – were enriched at +0.6 V vs. SHE using 12/12 h day/night cycles. After re-inoculation, the SC consortium developed a fully-reversible cathodic/anodic current, with a max. of −62 mA m−2 during the day and +110 mA m−2 at night, while the GC exhibited negligible daytime output but +98 mA m−2 at night. Community analysis revealed that both enrichments were dominated by cyanobacteria, indicating their potential as biocatalysts for indirect light conversion to electricity. Moreover, the presence of γ-proteobacterium Congregibacter in SC biofilm was likely related to the cathodic reductive current, indicating its effectiveness at catalysing cathodic oxygen reduction at a surprisingly high potential. For the first time a correlation between a dual microbial community and fully reversible current is reported.
Keyword Reversible current
Cathodic current
Biophotovoltaics
Microbial solar cell
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
Advanced Water Management Centre Publications
 
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