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Aerated Shewanella oneidensis in continuously fed bioelectrochemical systems for power and hydrogen production.
Biotechnol Bioeng. 2010 Apr 01; 105(5):880-8.BB

Abstract

We studied the effects of aeration of Shewanella oneidensis on potentiostatic current production, hydrogen production in a microbial electrolysis cell, and electric power generation in a microbial fuel cell (MFC). The potentiostatic performance of aerated S. oneidensis was considerably enhanced to a maximum current density of 0.45 A/m(2) or 80.3 A/m(3) (mean: 0.34 A/m(2), 57.2 A/m(3)) compared to anaerobically grown cultures. Biocatalyzed hydrogen production rates with aerated S. oneidensis were studied within the applied potential range of 0.3-0.9 V and were highest at 0.9 V with 0.3 m(3) H(2)/m(3) day, which has been reported for mixed cultures, but is approximately 10 times higher than reported for an anaerobic culture of S. oneidensis. Aerated MFC experiments produced a maximum power density of 3.56 W/m(3) at a 200-Omega external resistor. The main reasons for enhanced electrochemical performance are higher levels of active biomass and more efficient substrate utilization under aerobic conditions. Coulombic efficiencies, however, were greatly reduced due to losses of reducing equivalents to aerobic respiration in the anode chamber. The next challenge will be to optimize the aeration rate of the bacterial culture to balance between maximization of bacterial activation and minimization of aerobic respiration in the culture.

Authors+Show Affiliations

Department of Biological and Environmental Engineering, Cornell University, 214 Riley-Robb Hall, Ithaca, New York 14853, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

19998276

Citation

Rosenbaum, Miriam, et al. "Aerated Shewanella Oneidensis in Continuously Fed Bioelectrochemical Systems for Power and Hydrogen Production." Biotechnology and Bioengineering, vol. 105, no. 5, 2010, pp. 880-8.
Rosenbaum M, Cotta MA, Angenent LT. Aerated Shewanella oneidensis in continuously fed bioelectrochemical systems for power and hydrogen production. Biotechnol Bioeng. 2010;105(5):880-8.
Rosenbaum, M., Cotta, M. A., & Angenent, L. T. (2010). Aerated Shewanella oneidensis in continuously fed bioelectrochemical systems for power and hydrogen production. Biotechnology and Bioengineering, 105(5), 880-8. https://doi.org/10.1002/bit.22621
Rosenbaum M, Cotta MA, Angenent LT. Aerated Shewanella Oneidensis in Continuously Fed Bioelectrochemical Systems for Power and Hydrogen Production. Biotechnol Bioeng. 2010 Apr 1;105(5):880-8. PubMed PMID: 19998276.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Aerated Shewanella oneidensis in continuously fed bioelectrochemical systems for power and hydrogen production. AU - Rosenbaum,Miriam, AU - Cotta,Michael A, AU - Angenent,Largus T, PY - 2009/12/10/entrez PY - 2009/12/10/pubmed PY - 2010/5/5/medline SP - 880 EP - 8 JF - Biotechnology and bioengineering JO - Biotechnol Bioeng VL - 105 IS - 5 N2 - We studied the effects of aeration of Shewanella oneidensis on potentiostatic current production, hydrogen production in a microbial electrolysis cell, and electric power generation in a microbial fuel cell (MFC). The potentiostatic performance of aerated S. oneidensis was considerably enhanced to a maximum current density of 0.45 A/m(2) or 80.3 A/m(3) (mean: 0.34 A/m(2), 57.2 A/m(3)) compared to anaerobically grown cultures. Biocatalyzed hydrogen production rates with aerated S. oneidensis were studied within the applied potential range of 0.3-0.9 V and were highest at 0.9 V with 0.3 m(3) H(2)/m(3) day, which has been reported for mixed cultures, but is approximately 10 times higher than reported for an anaerobic culture of S. oneidensis. Aerated MFC experiments produced a maximum power density of 3.56 W/m(3) at a 200-Omega external resistor. The main reasons for enhanced electrochemical performance are higher levels of active biomass and more efficient substrate utilization under aerobic conditions. Coulombic efficiencies, however, were greatly reduced due to losses of reducing equivalents to aerobic respiration in the anode chamber. The next challenge will be to optimize the aeration rate of the bacterial culture to balance between maximization of bacterial activation and minimization of aerobic respiration in the culture. SN - 1097-0290 UR - https://www.unboundmedicine.com/medline/citation/19998276/Aerated_Shewanella_oneidensis_in_continuously_fed_bioelectrochemical_systems_for_power_and_hydrogen_production_ L2 - https://doi.org/10.1002/bit.22621 DB - PRIME DP - Unbound Medicine ER -