RT info:eu-repo/semantics/article
T1 Bioelectrochemical enhancement of methane production from exhausted vine shoot fermentation broth by integration of MEC with anaerobic digestion
A1 Carrillo Peña, Daniela Andrea
A1 Escapa González, Adrián
A1 Hijosa-Valsero, M.
A1 Paniagua-García, A. I.
A1 Díez-Antolínez, R.
A1 Mateos González, Raúl
A2 Ingenieria Quimica
K1 Ingeniería química
K1 Anaerobic digestion
K1 Electrochemical impedance spectroscopy
K1 Methane enhancement
K1 Microbial electrolysis cell
K1 Vine shoot treatment
AB [ES] A microbial electrolysis cell integrated in an anaerobic digestion system (MEC-AD) is an efficient configuration to produce methane from an exhausted vine shoot fermentation broth (EVS). The cell worked in a single-chamber two-electrode configuration at an applied potential of 1 V with a feeding ratio of 30/70 (30% EVS to 70% synthetic medium). In addition, an identical cell operated in an open circuit was used as a control reactor. Experimental results showed similar behavior in terms of carbon removal (70–76%), while the specific averaged methane production from cycle 7 was more stable and higher in the connected cell (MECAD) compared with the unpolarized one (OCAD) accounting for 403.7 ± 33.6 L CH4·kg VS−1 and 121.3 ± 49.7 L CH4·kg VS−1, respectively. In addition, electrochemical impedance spectroscopy revealed that the electrical capacitance of the bioanode in MECAD was twice the capacitance shown by OCAD. The bacterial community in both cells was similar but a clear adaptation of Methanosarcina Archaea was exhibited in MECAD, which could explain the increased yields in CH4 production. In summary, the results reported here confirm the advantages of integrating MEC-AD for the treatment of real organic liquid waste instead of traditional AD treatment.
PB Springer
SN 2190-6815
LK http://hdl.handle.net/10612/14968
UL http://hdl.handle.net/10612/14968
DS BULERIA. Repositorio Institucional de la Universidad de León
RD Jul 12, 2024