TY - JOUR
T1 - Continuous acetate production through microbial electrosynthesis from CO2 with microbial mixed culture
AU - Batlle-Vilanova, Pau
AU - Puig, Sebastià
AU - Gonzalez-Olmos, Rafael
AU - Balaguer, Maria Dolors
AU - Colprim, Jesús
N1 - Publisher Copyright:
© 2016 Society of Chemical Industry.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - BACKGROUND: Microbial electrosynthesis represents a promising approach for renewable energy storage in which chemically stable compounds are produced using CO2 as feedstock. This report describes the continuous production of acetate through microbial electrosynthesis from CO2 and assesses how the production rates could be increased. RESULTS: A continuous acetate production rate of 0.98mmol C LNCC-1 d-1 was obtained using CO2 as feedstock and with pH control around 5.8. These conditions increased substrate availability and favoured microbial electrosynthesis. Cyclic voltammograms demonstrated the electroautotrophic activity on the biocathode surface, which increased with pH control and caused current demand and acetate production rate to rise exponentially. CONCLUSION: pH decrease was shown to be an effective strategy to increase substrate availability and enhance microbial electrosynthesis. By making microbial electrosynthesis a feasible technology, CO2 could become an alternative feedstock for the carboxylate platform.
AB - BACKGROUND: Microbial electrosynthesis represents a promising approach for renewable energy storage in which chemically stable compounds are produced using CO2 as feedstock. This report describes the continuous production of acetate through microbial electrosynthesis from CO2 and assesses how the production rates could be increased. RESULTS: A continuous acetate production rate of 0.98mmol C LNCC-1 d-1 was obtained using CO2 as feedstock and with pH control around 5.8. These conditions increased substrate availability and favoured microbial electrosynthesis. Cyclic voltammograms demonstrated the electroautotrophic activity on the biocathode surface, which increased with pH control and caused current demand and acetate production rate to rise exponentially. CONCLUSION: pH decrease was shown to be an effective strategy to increase substrate availability and enhance microbial electrosynthesis. By making microbial electrosynthesis a feasible technology, CO2 could become an alternative feedstock for the carboxylate platform.
KW - Biocathode
KW - Carbon dioxide valorization
KW - Electroautotrophs
KW - Homoacetogenesis
KW - Valuable compounds
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U2 - 10.1002/jctb.4657
DO - 10.1002/jctb.4657
M3 - Article
AN - SCOPUS:84960800803
SN - 0268-2575
VL - 91
SP - 921
EP - 927
JO - Journal of Chemical Technology and Biotechnology
JF - Journal of Chemical Technology and Biotechnology
IS - 4
ER -