Journal article

Oxygen Suppresses Light-Driven Anodic Current Generation by a Mixed Phototrophic Culture

Libertus Darus, Pablo Ledezma, Juerg Keller, Stefano Freguia

Environmental Science & Technology | AMER CHEMICAL SOC | Published : 2014

Abstract

This paper describes the detrimental effect of photosynthetically evolved oxygen on anodic current generation in the presence of riboflavin upon illumination of a mixed phototrophic culture enriched from a freshwater pond at +0.6 V vs standard hydrogen electrode. In the presence of riboflavin, the phototrophic biomass in the anodic compartment produced an electrical current in response to light/dark cycles (12 h/12 h) over 12 months of operation, generating a maximum current density of 17.5 mA x m(-2) during the dark phase, whereas a much lower current of approximately 2 mA x m(-2) was generated during illumination. We found that the low current generation under light exposure was caused by ..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council


Awarded by ARC


Awarded by ARC DP


Funding Acknowledgements

This research was funded by the Australian Research Council (ARC DP 120104415). Libertus Dams was supported by the Directorate General of Higher Education (DGHE) of Indonesia and the above ARC project. Stefano Freguia is supported by the fellowship ARC DE130101168. Pablo Ledezma is supported by ARC DP 120104415. We thank Dr. Bernardino Virdis for valuable discussion, Dr. Phil Bond and Dr. Kenn Lu for help with sequencing analyses and FISH, Ampon Chumpia and Markus Fluggen for technical support.