Tracking bio-hydrogen-mediated production of commodity chemicals from carbon dioxide and renewable electricity

Puig, Sebastià; Ganigué, Ramón; Balaguer, M. Dolors; Bañeras, Lluís; Colprim, Jesús

doi:10.1016/j.biortech.2016.12.035

Cited by 35 publications

(14 citation statements)

References 47 publications

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“…Possible competition for electron donors between both functional microbial groups still needs to be uncovered. H2 may be an electron mediator for the CO2 reduction to acetate in our systems, as previously reported for MES from CO2 to acetate studies (Blanchet et al, 2015;Jourdin et al, 2016b;LaBelle and May, 2017;Puig et al, 2017). However, a kinetic and thermodynamic modeling study predicted that direct acetate conversion to MCFAs by H2 is most likely not feasible even under high H2 partial pressures (González-Cabaleiro et al, 2013).…”

Section: Bioelectrochemical Chain Elongation Perspectivesupporting

confidence: 51%

“…In addition, (bio)electrochemically produced hydrogen may also have diffused through the biofilm, and served as electron shuttle to microorganisms, e.g., for the CO2 reduction to acetate, thus allowing the biofilm to grow thick. The role of H2 as electron mediator in MES systems has been extensively discussed (Blanchet et al, 2015;Jourdin et al, 2016b;LaBelle and May, 2017;Puig et al, 2017) and some biofilms were showed to be very effective at capturing it before it could escape the biofilm (Jourdin et al, 2016b). Some methanogens belonging to genera such as Methanosaeta and Methanospirillum were also showed to form long filaments over hundreds of micrometers in anaerobic granular sludge (Parshina et al, 2014;Li et al, 2015;Zhou et al, 2015).…”

Section: High Microorganism Morphology Diversity With Filamentous Micmentioning

confidence: 99%

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Critical Biofilm Growth throughout Unmodified Carbon Felts Allows Continuous Bioelectrochemical Chain Elongation from CO2 up to Caproate at High Current Density

et al. 2018

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Current challenges for microbial electrosynthesis include the production of higher value chemicals than acetate, at high rates, using cheap electrode materials. We demonstrate here the continuous, biofilm-driven production of acetate (C2), n-butyrate (nC4), and n-caproate (nC6) from sole CO2 on unmodified carbon felt electrodes. No other organics were detected. This is the first quantified continuous demonstration of n-caproate production from CO2 using an electrode as sole electron donor. During continuous nutrients supply mode, a thick biofilm was developed covering the whole thickness of the felt (1.2-cm deep), which coincided with high current densities and organics production rates. Current density reached up to −14 kA m −3 electrode (−175 A m −2). Maximum sustained production rates of 9.8 ± 0.65 g L −1 day −1 C2, 3.2 ± 0.1 g L −1 day −1 nC4, and 0.95 ± 0.05 g L −1 day −1 nC6 were achieved (averaged between duplicates), at electron recoveries of 60-100%. Scanning electron micrographs revealed a morphologically highly diverse biofilm with long filamentous microorganism assemblies (~400 μm). n-Caproate is a valuable chemical for various industrial application, e.g., it can be used as feed additives or serve as precursor for liquid biofuels production.

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Section: Bioelectrochemical Chain Elongation Perspectivesupporting

confidence: 51%

Section: High Microorganism Morphology Diversity With Filamentous Micmentioning

confidence: 99%

Critical Biofilm Growth throughout Unmodified Carbon Felts Allows Continuous Bioelectrochemical Chain Elongation from CO2 up to Caproate at High Current Density

et al. 2018

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“…DET is usually via pili or bacterial nanowires, while MET uses redox‐active compounds . Puig et al . reported that H 2 as an electron mediator.…”

Section: Research Advancesmentioning

confidence: 99%

“…DET is usually via pili or bacterial nanowires, while MET uses redox-active compounds. 153 Puig et al 154 reported that H 2 as an electron mediator. Furthermore, Zhao et al 152 concluded that DET was the main mechanism at the biocathode in a BES coupled with chemical absorption for NO removal, and the microscopy of the biocathode confirmed the existence of pili, which is assumed to be a bacterial nanowire responsible for electron transfer.…”

Section: Electron Transfer Pathways In the Biocathode Of Mecmentioning

confidence: 99%

Microbial electrolysis cell as an emerging versatile technology: a review on its potential application, advance and challenge

Hua

et al. 2019

J of Chemical Tech & Biotech

101

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Microbial electrolysis cells (MECs) have been studied in a wide range of potential applications such as recalcitrant pollutants removal, chemicals synthesis, resources recovery and biosensors. However, MEC technology is still in its infancy and poses serious challenges for practical large‐scale applications. To understand the diversified applications of MEC, this review aims to explore MEC applications in the following contexts: an overview of MEC for energy generation and recycling such as hydrogen, methane, formic acid and hydrogen peroxide; contaminant removal, specifically complex organic pollutants and inorganic pollutants; as a sensor; as well as resource recovery. New concepts of MEC technology; configuration optimization; electron transfer pathways in biocathodes, and coupling with other technologies for value‐added applications such as MEC‐anaerobic digestion, MEC‐MFC, MEC‐MDC and bio‐E‐Fenton system are discussed. Finally, challenges and outlooks are suggested. The review aims to assist researchers and engineers to understand the latest trends in MEC technologies and applications. © 2018 Society of Chemical Industry

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“…The reduction of CO 2 to organics can occur through direct electron transfer (DET) or through the intermediate production of H 2 , which acts as an electron transfer shuttle (as is the case with many acetogenic bacteria (Puig et al, 2017); Wenzel et al). Until now, the main products of MES have been methane (electromethanogenesis) and acetate (homoacetogenesis), although the yield and product titers are still far from commercial application.…”

Section: Bioelectrochemical Co 2 Reductionmentioning

confidence: 99%

Editorial: Microbial Synthesis, Gas-Fermentation and Bioelectroconversion of CO2 and Other Gaseous Streams

2019

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Tracking bio-hydrogen-mediated production of commodity chemicals from carbon dioxide and renewable electricity

Cited by 35 publications

References 47 publications

Critical Biofilm Growth throughout Unmodified Carbon Felts Allows Continuous Bioelectrochemical Chain Elongation from CO2 up to Caproate at High Current Density

Critical Biofilm Growth throughout Unmodified Carbon Felts Allows Continuous Bioelectrochemical Chain Elongation from CO2 up to Caproate at High Current Density

Microbial electrolysis cell as an emerging versatile technology: a review on its potential application, advance and challenge

Editorial: Microbial Synthesis, Gas-Fermentation and Bioelectroconversion of CO2 and Other Gaseous Streams

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