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Long-term continuous production of H2 in a microbial electrolysis cell (MEC) treating saline wastewater

Carmona-Martínez, Alessandro Alfredo and Trably, Eric and Milferstedt, Kim and Lacroix, Rémy and Etcheverry, Luc and Bernet, Nicolas Long-term continuous production of H2 in a microbial electrolysis cell (MEC) treating saline wastewater. (2015) Water Research, 81. 149-156. ISSN 0043-1354

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Official URL: https://doi.org/10.1016/j.watres.2015.05.041


A biofilm-based 4 L two chamber microbial electrolysis cell (MEC) was continuously fed with acetate under saline conditions (35 g/L NaCl) for more than 100 days. The MEC produced a biogas highly enriched in H2 (≥90%). Both current (10.6 ± 0.2 A/m2Anode or 199.1 ± 4.0 A/m3MEC) and H2 production (201.1 ± 7.5 LH2/m2Cathode·d or 0.9 ± 0.0 m3H2/m3MEC·d) rates were highly significant when considering the saline operating conditions. A microbial analysis revealed an important enrichment in the anodic biofilm with five main bacterial groups: 44% Proteobacteria, 32% Bacteroidetes, 18% Firmicutes and 5% Spirochaetes and 1% Actinobacteria. Of special interest is the emergence within the Proteobacteria phylum of the recently described halophilic anode-respiring bacteria Geoalkalibacter (unk. species), with a relative abundance up to 14%. These results provide for the first time a noteworthy alternative for the treatment of saline effluents and continuous production of H2.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > 6T-MIC Ingenieries (FRANCE)
Other partners > 6T-MIC Ingenieries (FRANCE)

French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
French National Research Agency (ANR)
Deposited On:05 Nov 2018 10:11

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