Abstract
© 2016 Elsevier B.V. This work reports the first successful enrichment and operation of alkaline bioelectrochemical systems (microbial fuel cells, MFC, and microbial electrolysis cells, MEC). Alkaline (pH = 9.3) bioelectrochemical hydrogen production presented better performance (+117%) compared to conventional neutral conditions (2.6 vs 1.2 litres of hydrogen gas per litre of reactor per day, LH2·L-1REACTOR·d-1). Pyrosequencing results of the anodic biofilm showed that while Geobacter was mainly detected under conventional neutral conditions, Geoalkalibacter sp. was highly detected in the alkaline MFC (21%) and MEC (48%). This is the first report of a high enrichment of Geoalkalibacter from an anaerobic mixed culture using alkaline conditions in an MEC. Moreover, Alkalibacter sp. was highly present in the anodic biofilm of the alkaline MFC (37%), which would indicate its potentiality as a new exoelectrogen.
| Original language | English |
|---|---|
| Pages (from-to) | 57-62 |
| Journal | Bioelectrochemistry |
| Volume | 109 |
| DOIs | |
| Publication status | Published - 1 Jun 2016 |
Keywords
- Alkalibacter
- Alkaline
- Geoalkalibacter
- Microbial electrolysis cell (MEC)
- Microbial fuel cell (MFC)
- Pyrosequencing
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Cite this
Rago, L., Baeza, J. A., & Guisasola, A. (2016). Increased performance of hydrogen production in microbial electrolysis cells under alkaline conditions. Bioelectrochemistry, 109, 57-62. https://doi.org/10.1016/j.bioelechem.2016.01.003