ORCID Profile
0000-0002-6572-1154
Current Organisation
Delft University of Technology
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Publisher: Elsevier BV
Date: 09-2016
Publisher: Elsevier BV
Date: 04-2021
Publisher: Wiley
Date: 04-08-2020
Abstract: Valorization of organic residual streams that produce short‐chain fatty acids (SCFA) require an energetic electron donor to form more valuable elongated products. By microbial electrosynthesis such electrons donor is supplied by an electrode. Here we show that bioelectrochemical chain elongation (BCE) of SCFA was steered to high selective product formation efficiencies depending on the supplied fatty acid. n‐ Butyrate, n‐ valerate, n‐ caproate were in different experimental conditions formed at respectively 94.1, 95.4 and 83.4% carbon‐based selectivity. The reactor microbiomes adapted to the new feeding conditions within a few days. Remarkably, propionate elongation appeared to be preferred over acetate elongation. Propionate elongation resulted in highly selective formation of the odd‐chain fatty acid n‐ valerate this seems contradictory to ethanol chain elongation studies in which acetate is concurrently formed leading to straight fatty acids as by products.
Publisher: Elsevier BV
Date: 12-2020
Publisher: Frontiers Media SA
Date: 03-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA90096D
Abstract: Correction for ‘ Methanobacterium enables high rate electricity-driven autotrophic sulfate reduction’ by Guillermo Pozo et al. , RSC Adv. , 2015, 5 , 89368–89374.
Publisher: Elsevier BV
Date: 04-2015
DOI: 10.1016/J.BIOELECHEM.2014.12.001
Abstract: It is still unclear whether autotrophic microbial biocathode biofilms are able to self-regenerate under purely cathodic conditions without any external electron or organic carbon sources. Here we report on the successful development and long-term operation of an autotrophic biocathode whereby an electroactive biofilm was able to grow and sustain itself with CO2 as a sole carbon source and using the cathode as electron source, with H2 as sole product. From a small inoculum of 15 mg COD (in 250 mL), containing 30.3% Archaea, the bioelectrochemical system operating at -0.5 V vs. SHE enabled an estimated biofilm growth of 300 mg as COD over a period of 276 days. A dramatic change in the microbial population was observed during this period with Archaea disappearing completely (<0.1% of population). The predominant phyla enriched were Proteobacteria (57.3%), Firmicutes (12.4%), Bacteroidetes (11.6%) and Actinobacteria (1.1%). Up to 9.2 L H2 m(-2) day(-1) (1.88 A m(-2)) was achieved when the cathode potential was decreased to -0.75 V vs. SHE. This study demonstrates that purely autotrophic biofilm growth coupled to proton reduction to hydrogen alone can be sustained with a cathode as the sole electron source, while avoiding the development of H2-consuming microorganisms such as methanogens and acetogens.
Publisher: American Chemical Society (ACS)
Date: 28-01-2020
DOI: 10.1021/ACS.ACCOUNTS.9B00523
Abstract: Carbon-based products are crucial to our society, but their production from fossil-based carbon is unsustainable. Production pathways based on the reuse of CO
Publisher: Frontiers Media SA
Date: 19-01-2023
DOI: 10.3389/FBIOE.2023.1096086
Abstract: Microbial electrochemical technologies (METs) employ microorganisms utilizing solid-state electrodes as either electron sink or electron source, such as in microbial electrosynthesis (MES). METs reaction rate is traditionally normalized to the electrode dimensions or to the electrolyte volume, but should also be normalized to biomass amount present in the system at any given time. In biofilm-based systems, a major challenge is to determine the biomass amount in a non-destructive manner, especially in systems operated in continuous mode and using 3D electrodes. We developed a simple method using a nitrogen balance and optical density to determine the amount of microorganisms in biofilm and in suspension at any given time. For four MES reactors converting CO 2 to carboxylates, & % of the biomass was present as biofilm after 69 days of reactor operation. After a lag phase, the biomass-specific growth rate had increased to 0.12–0.16 days −1 . After 100 days of operation, growth became insignificant. Biomass-specific production rates of carboxylates varied between 0.08–0.37 mol C mol X −1 d −1 . Using biomass-specific rates, one can more effectively assess the performance of MES, identify its limitations, and compare it to other fermentation technologies.
Publisher: Wiley
Date: 16-06-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA18444D
Abstract: The autotrophic reduction of sulfate can be sustained with a cathode as the only electron donor in bioelectrochemical systems (BES).
Publisher: American Chemical Society (ACS)
Date: 03-02-2016
Abstract: The enhancement of microbial electrosynthesis (MES) of acetate from CO2 to performance levels that could potentially support practical implementations of the technology must go through the optimization of key design and operating conditions. We report that higher proton availability drastically increases the acetate production rate, with pH 5.2 found to be optimal, which will likely suppress methanogenic activity without inhibitor addition. Applied cathode potential as low as -1.1 V versus SHE still achieved 99% of electron recovery in the form of acetate at a current density of around -200 A m(-2). These current densities are leading to an exceptional acetate production rate of up to 1330 g m(-2) day(-1) at pH 6.7. Using highly open macroporous reticulated vitreous carbon electrodes with macropore sizes of about 0.6 mm in diameter was found to be optimal for achieving a good balance between total surface area available for biofilm formation and effective mass transfer between the bulk liquid and the electrode and biofilm surface. Furthermore, we also successfully demonstrated the use of a synthetic biogas mixture as carbon dioxide source, yielding similarly high MES performance as pure CO2. This would allow this process to be used effectively for both biogas quality improvement and conversion of the available CO2 to acetate.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA03101F
Abstract: Enhanced performance for the bioelectrosynthesis of acetate from carbon dioxide is achieved with a new three-dimensional CNT-modified scaffold electrode.
Publisher: Wiley
Date: 11-2018
Publisher: American Chemical Society (ACS)
Date: 28-10-2015
Abstract: High product specificity and production rate are regarded as key success parameters for large-scale applicability of a (bio)chemical reaction technology. Here, we report a significant performance enhancement in acetate formation from CO2, reaching comparable productivity levels as in industrial fermentation processes (volumetric production rate and product yield). A biocathode current density of -102 ± 1 A m(-2) and an acetic acid production rate of 685 ± 30 (g m(-2) day(-1)) have been achieved in this study. High recoveries of 94 ± 2% of the CO2 supplied as the sole carbon source and 100 ± 4% of electrons into the final product (acetic acid) were achieved after development of a mature biofilm, reaching an elevated product titer of up to 11 g L(-1). This high product specificity is remarkable for mixed microbial cultures, which would make the product downstream processing easier and the technology more attractive. This performance enhancement was enabled through the combination of a well-acclimatized and enriched microbial culture (very fast start-up after culture transfer), coupled with the use of a newly synthesized electrode material, EPD-3D. The throwing power of the electrophoretic deposition technique, a method suitable for large-scale production, was harnessed to form multiwalled carbon nanotube coatings onto reticulated vitreous carbon to generate a hierarchical porous structure.
Publisher: Wiley
Date: 13-01-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CY02151F
Abstract: Doping activated carbon biocathodes with nickel improves microbial electrosynthesis due to both electrocatalytic (hydrogen production) and non-catalytic effects.
Publisher: Frontiers Media SA
Date: 04-06-2021
DOI: 10.3389/FMICB.2021.669218
Abstract: Up to now, computational modeling of microbial electrosynthesis (MES) has been underexplored, but is necessary to achieve breakthrough understanding of the process-limiting steps. Here, a general framework for modeling microbial kinetics in a MES reactor is presented. A thermodynamic approach is used to link microbial metabolism to the electrochemical reduction of an intracellular mediator, allowing to predict cellular growth and current consumption. The model accounts for CO 2 reduction to acetate, and further elongation to n-butyrate and n-caproate. Simulation results were compared with experimental data obtained from different sources and proved the model is able to successfully describe microbial kinetics (growth, chain elongation, and product inhibition) and reactor performance (current density, organics titer). The capacity of the model to simulate different system configurations is also shown. Model results suggest CO 2 dissolved concentration might be limiting existing MES systems, and highlight the importance of the delivery method utilized to supply it. Simulation results also indicate that for biofilm-driven reactors, continuous mode significantly enhances microbial growth and might allow denser biofilms to be formed and higher current densities to be achieved.
Publisher: Elsevier BV
Date: 09-2019
Publisher: Wiley
Date: 05-2021
Abstract: Electrocatalytic metals and microorganisms can be combined for CO 2 conversion in microbial electrosynthesis (MES). However, a systematic investigation on the nature of interactions between metals and MES is still lacking. To investigate this nature, we integrated a copper electrocatalyst, converting CO 2 to formate, with microorganisms, converting CO 2 to acetate. A co‐catalytic (i. e. metabolic) relationship was evident, as up to 140 mg L −1 of formate was produced solely by copper oxide, while formate was also evidently produced by copper and consumed by microorganisms producing acetate. Due to non‐metabolic interactions, current density decreased by over 4 times, though acetate yield increased by 3.3 times. Despite the antimicrobial role of copper, biofilm formation was possible on a pure copper surface. Overall, we show for the first time that a CO 2 ‐reducing copper electrocatalyst can be combined with MES under biological conditions, resulting in metabolic and non‐metabolic interactions.
Publisher: Wiley
Date: 21-12-2016
Publisher: WORLD SCIENTIFIC (EUROPE)
Date: 25-10-2017
Location: France
Location: New Zealand
Location: Canada
Location: Canada
Location: Australia
No related grants have been discovered for Ludovic Jourdin.