High Acetic Acid Production Rate Obtained by Microbial Electrosynthesis from Carbon Dioxide

Jourdin, Ludovic; Grieger, Timothy; Monetti, Juliette; Flexer, Victoria; Freguia, Stefano; Lü, Yang; Chen, Jun; Romano, Mark S.; Wallace, Gordon G.; Keller, Jürg

doi:10.1021/acs.est.5b03821

Cited by 255 publications

(193 citation statements)

References 68 publications

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“…However, the most remarkable shift of the reductive wave onset was attained with the electroactive inoculum, almost 0.2 V higher than the reactors with non-electroactive inoculum. This reductive wave shift is consistent with CVs obtained from BESs with live biocathodes producing hydrogen, acetate and methane (Jourdin et al 2015a;Marshall et al 2012). Accordingly, a much higher cathodic current of about -1.2 A m -2 was achieved at acclimated inoculum remained at -0.07 A m -2 at the same potential and pH.…”

Section: Establishing An Autotrophic Sulfate-reducing Bessupporting

confidence: 86%

“…The cathode potential was decreased to -1.1 V vs. SHE after 55 days of operation in order to increase the SRR. This potentiostatic start-up has been successful in enriching an autotrophic cathodic biofilm for nitrate reduction (Gregoire et al 2014) and carbon dioxide reduction (Jourdin et al 2015a). …”

Section: Specific Methodsmentioning

confidence: 99%

“…In autotrophic microbial electrosynthesis, (Jourdin et al 2015a) showed that H 2 -mediated electron transfer drives the process of CO 2 reduction to acetate and suggested that biologically-driven Cu deposition on the electrode surface was responsible for the observed increase in hydrogen evolution. Another recent study by Yates et al 2014 suggested instead that enhanced hydrogen production resulted from cell debris, with living cells not required.…”

Section: Elucidation Of Autotrophic Sulfate-reducing Mechanisms In Bimentioning

confidence: 99%

“…Carbon electrode materials are a key parameter that affects biofilm attachment and selective microbial retention. Several three-dimensional carbon electrodes have been proposed in order to increase microbial-surface interaction due to their high conductivity, good chemical stability and smooth surface (Jourdin et al 2015a;Jourdin et al 2016a;Marshall et al 2012;Virdis et al 2011). Although some research has been carried out on carbonbased surface as electron material for autotrophic sulfate removal (Su et al 2012;Coma et al 2013;Luo et al 2014;Teng et al 2016;Blázquez et al 2016), no single study exists which described autotrophic sulfate reduction using three-dimensional coating multiwalled carbon nanotubes on reticulated vitreous carbon (MWCNT-RVC) as the electrode material.…”

Section: Elucidation Of Autotrophic Sulfate-reducing Mechanisms In Bimentioning

confidence: 99%

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Bio-Electrochemical process for Metal and Sulfur Recovery from Acid Mine Drainage

Zamora¹,

Alonso²

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Water recycling and resource recovery from acid mine drainage (AMD) are increasingly being regarded as desirable practices with direct benefits for the environment and the operational and economic viability of the resources sector.This thesis proves the concept of a novel bioelectrochemical system (BES) for the direct electrode-driven resource recovery and practically permanent AMD treatment. The technology consists of a two-cell bioelectrochemical setup to enable the removal of sulfate from the ongoing reduction-oxidation sulfur cycle, thereby also reducing salinity, without external addition of chemicals.In particular, the goals of this thesis are: (i) to enrich a sulfate reducing bacterial community capable of directly utilising a carbon based cathode as electron donor for autotrophic sulfate reduction, or via bioelectrochemically-produced H 2 ; (ii) to elucidate the electron flux pathways of autotrophic sulfate reduction and microbial interactions in cathodic mixed cultures; (iii) to develop a high-rate sulfate reducing bioelectrochemical reactor based on high surface area electrode materials; (iv) to design and implement a combined chemical-free bioelectrochemical process that enables the sulfur, metal and water recovery from AMD.In order to elucidate whether cathodes can effectively release electrons and act as the only electron donor to support sulfate reduction process, the effect of cathode potential and inoculum source were evaluated using electrochemical tools, including the recording of chronoamperometry and cyclic/linear sweep voltammetry (Chapter 5). Electrochemical and off-gas analysis coupled to liquid phase sampling was carried out to determine the electron fluxes from the electrode to the final electron acceptor (sulfate) during autotrophic sulfate reduction (Chapter 6). Fluorescence in situ hybridization (FISH) and digital image analysis (DAIME) of the microbial communities in z-stack confirmed the microbial stratification. After obtaining a well-functioning biocathode for autotrophic sulfate reduction, its performance was experimentally optimised in terms of high-surface area electrode materials, like multi-wall carbon nanotubes on reticulated vitreous carbon (MWCNT-RVC) and carbon granules (CG) (Chapter 7). Finally, a novel BES was tested for AMD treatment , outcompeting methanogens and homoacetogens for the hydrogen without the need to add chemical inhibitors.The findings of this thesis show that inexpensive CG can achieve higher current-tosulfide efficiencies at lower power consumption than the nano-modified three-dimensional MWCNT-RVC. Sequencing analysis of the 16S rRNA gene on day 58 revealed that MWCNT-RVC retained the bacteria and archaea population from the inoculum, while CG electrode surface was able to select for bacteria over archaea.The feasibility to integrate a two-stage BES was proven with a lab-scale setup for AMD treatment. Using AMD, the BES operation enhanced the sulfate reduction rate ( The solid metal-sludge was 2 times less voluminous and 9 times more readily s...

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Section: Establishing An Autotrophic Sulfate-reducing Bessupporting

confidence: 86%

Section: Specific Methodsmentioning

confidence: 99%

Section: Elucidation Of Autotrophic Sulfate-reducing Mechanisms In Bimentioning

confidence: 99%

Section: Elucidation Of Autotrophic Sulfate-reducing Mechanisms In Bimentioning

confidence: 99%

See 2 more Smart Citations

Bio-Electrochemical process for Metal and Sulfur Recovery from Acid Mine Drainage

Zamora¹,

Alonso²

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“…Therefore, investigations into optimal microbial communities along with interspecies interactions have also gained attention in recent years. [16][17][18][19][20][21][22][23][24][25] The practical application of microbial electrosynthesis still requires a deeper understanding of how reactor design may fundamentally impact performance and overall microbial composition. In most cases, a microbial electrosynthesis reactor is a dual-chambered system composed of an anode electrode, a cathode electrode and a separator.…”

mentioning

confidence: 99%

The Effect of Membrane Type on the Performance of Microbial Electrosynthesis Cells for Methane Production

Babanova

Carpenter

Phadke

et al. 2016

J. Electrochem. Soc.

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This study evaluated the influence of the membrane type on the performance of bioelectromethanogenesis reactors. The functional activities and taxonomic composition of bioelectrochemical systems (BES) with Nafion 117 or Ultrex CMI-7000 membranes were assessed. Functional activity was measured as methane production and current consumption rates throughout operation. Microbial biomass and phylogenetic diversity were characterized at strategic intervals related to the membrane type used. The Nafion-BES reactor showed the best performance in terms of current consumption and methane production in the early operational period and a strong selection for fermentative bacteria. However, the Nafion-BES was not able to sustain this activity over the course of 7 subpassages since methanogenic species were ultimately selected against and did not appear in the community composition for the last two subpassages. In contrast, the Ultrex-BES had a lower pH concentration gradient and lower overall current consumption activity; however, the methane production activity from the Ultrex-BES was equivalent or better than the Nafion-BES reactor and was sustained throughout the seven subpassages. The membrane type appeared to be responsible not only for differences in the electrochemical operation of the BESs but it also influenced microbial taxonomic composition and dynamics. Microbial electrosynthesis has been reported as a promising new technology for the synthesis of value-added products from CO 2 or other organic feedstocks.1 Microbial electrosynthesis relies on microbial population, applied potential, system design and the specific environmental conditions to define the final products and overall efficiencies of these systems.2-7 As a new technology, most of the studies in the area of microbial electrosynthesis address: i) proving the concept of using bacteria as electrocatalysts for targeted synthesis of a given product 8,9 and ii) understanding the mechanisms of "communication" between microbial species and electrode surfaces used as electron donors.10-13 Pure microbial cultures have primarily been used as they can provide selectivity of the synthesis process.2,12-15 However, from a practical standpoint, natural mixed microbial communities may provide a better strategy for bioelectrochemical systems exploring microbial electrosynthesis because they are more robust relative to operational changes, have greater metabolic capacity for converting/synthesizing complex substrates and are less susceptible to contamination during long-term operation. Therefore, investigations into optimal microbial communities along with interspecies interactions have also gained attention in recent years. [16][17][18][19][20][21][22][23][24][25] The practical application of microbial electrosynthesis still requires a deeper understanding of how reactor design may fundamentally impact performance and overall microbial composition. In most cases, a microbial electrosynthesis reactor is a dual-chambered system composed of an anode electrode, a cathode ele...

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Bioelectrochemical Systems for Production of Valuable Compounds

Peixoto

Barbosa

Alves

et al. 2019

Bioelectrochemical Interface Engineering

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High Acetic Acid Production Rate Obtained by Microbial Electrosynthesis from Carbon Dioxide

Cited by 255 publications

References 68 publications

Bio-Electrochemical process for Metal and Sulfur Recovery from Acid Mine Drainage

Bio-Electrochemical process for Metal and Sulfur Recovery from Acid Mine Drainage

The Effect of Membrane Type on the Performance of Microbial Electrosynthesis Cells for Methane Production

Bioelectrochemical Systems for Production of Valuable Compounds

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