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Título
Hydrogen evolution in microbial electrolysis cells treating landfill leachate: Dynamics of anodic biofilm
Autor
Facultad/Centro
Área de conocimiento
Datos de la obra
International Journal of Hydrogen Energy, 2018, n. 43
Editor
Elsevier
Fecha
2018
Résumé
This study investigates the potential opportunities of hydrogen evolution treating landfill
leachate in a set of two microbial electrolysis cells (MEC-1 and 2) under 30 C and 17 ± 3 C
temperatures, respectively. The system achieved a projected current density of
1000e1200 mA m 2 (MEC-1) and 530e755 mA m 2 (MEC-2) coupled with low cost hydrogen
production rate of 0.148 L La 1 d 1 (MEC-1) and 0.04 L La 1 d 1 (MEC-2) at an applied voltage
of 1.0 V. Current generation led to a maximum COD oxidation of 73 ± 8% (MEC-1) and
65 ± 7% (MEC-2) with 100% energy recovery. The system also exhibited a high hydrogen
recovery (66e95%), pure hydrogen yield (98%) and tremendous working stability during two
months of operation. Electroactive microbes such as Pseudomonadaceae, Geobacteraceae and
Comamonadaceae were found in anodophilic biofim, along with Rhodospirillaceae and Rhodocyclaceae,
which could be involved in hydrogen production. These results demonstrated
an energy-efficient approach for hydrogen production coupled with pollutants removal.
This research was supported by the regional government ‘Junta de Castilla y León, Consejería de Educación’ and Ana Sotres thanks for the postdoctoral contract associated with project reference: LE060U16, co-financed by FEDER funds
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