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Article Dans Une Revue Water Research Année : 2015

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

Résumé

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.
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Dates et versions

hal-01167881 , version 1 (28-05-2020)

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Alessandro Carmona Martinez, Eric Trably, Kim Milferstedt, Rémy Lacroix, Luc Etcheverry, et al.. Long-term continuous production of H2 in a microbial electrolysis cell (MEC) treating saline wastewater. Water Research, 2015, 81, pp.149-156. ⟨10.1016/j.watres.2015.05.041⟩. ⟨hal-01167881⟩
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