Microbial electrosynthesis: Towards sustainable biorefineries for production of green chemicals from CO2 emissions

Dessì, Paolo; Rovira-Alsina, Laura; Sánchez, Carlos; Dinesh, G. Kumaravel; Tong, Wenming; Chatterjee, Pritha; Tedesco, Michele; Farràs, Pau; Hamelers, H.V.M.; Puig, Sebastià

doi:10.1016/j.biotechadv.2020.107675

Cited by 126 publications

(77 citation statements)

References 162 publications

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“…In an electromethanogenesis system, Geppert et al (2019) increased the current density from 0.5 to 3.5 mA/cm 2 and found optimum conditions at around 2.5 mA/cm 2 , while at higher current densities the fraction of electrons lost as unused hydrogen in the off-gas increased. This was interpreted by others as a “metabolic limitation of the biocatalyst” ( Dessì et al, 2020 ). However, microbial production of methane as well as acetate from H 2 /CO 2 is possible at rates exceeding the rates achieved in bioelectrochemical systems today by about one order of magnitude ( Rittmann et al, 2012 ; Kantzow et al, 2015 ; Asimakopoulos et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

“…So far, the volumetric electron supply in MES has been limited to current densities in the range of 1 mA/cm 2 , with rates up to 20 mA/cm 2 only reported for projected surface areas that widely underestimate the actual active electrode surface ( Prévoteau et al, 2020 ). Therefore, a key improvement target for transferring this technology from laboratory to larger scale is increasing the current density to maximize the electron feed per volume ( Dessì et al, 2020 ; Jourdin et al, 2020 ). Hydrogen-driven MES is particularly promising as H 2 can be electrochemically produced at high rates and 100% selectivity using inexpensive materials and is used by a wide variety of anaerobic microorganisms ( Blanchet et al, 2015 ; Kracke et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Efficient Hydrogen Delivery for Microbial Electrosynthesis via 3D-Printed Cathodes

et al. 2021

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The efficient delivery of electrochemically in situ produced H2 can be a key advantage of microbial electrosynthesis over traditional gas fermentation. However, the technical details of how to supply large amounts of electric current per volume in a biocompatible manner remain unresolved. Here, we explored for the first time the flexibility of complex 3D-printed custom electrodes to fine tune H2 delivery during microbial electrosynthesis. Using a model system for H2-mediated electromethanogenesis comprised of 3D fabricated carbon aerogel cathodes plated with nickel-molybdenum and Methanococcus maripaludis, we showed that novel 3D-printed cathodes facilitated sustained and efficient electromethanogenesis from electricity and CO2 at an unprecedented volumetric production rate of 2.2 LCH4 /Lcatholyte/day and at a coulombic efficiency of 99%. Importantly, our experiments revealed that the efficiency of this process strongly depends on the current density. At identical total current supplied, larger surface area cathodes enabled higher methane production and minimized escape of H2. Specifically, low current density (<1 mA/cm2) enabled by high surface area cathodes was found to be critical for fast start-up times of the microbial culture, stable steady state performance, and high coulombic efficiencies. Our data demonstrate that 3D-printing of electrodes presents a promising design tool to mitigate effects of bubble formation and local pH gradients within the boundary layer and, thus, resolve key critical limitations for in situ electron delivery in microbial electrosynthesis.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Hydrogen Delivery for Microbial Electrosynthesis via 3D-Printed Cathodes

et al. 2021

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“…C 4 -C 8 carboxylic acids can be produced by further microbial chain elongation to gain higher economic benefit (Jiang et al, 2019;Jourdin and Burdyny, 2020). Although acetic acid can be produced in MES with high selectivity (>90%) (Nevin et al, 2010), conversion of CO 2 to longer-chain carboxylic acids would be in low specificity and at low production rates (Dessì et al, 2021). For example, Jiang et al reported the highest production rate of caproate is 2.41 g/(L$d) (Jiang et al, 2020).…”

Section: Microbial Electrosynthesismentioning

confidence: 99%

“…It must be noted that although other energy outputs inclusive of hydrogen and nutrients in the digestate are outside the study's boundary, they can be recovered as by-products to build ll OPEN ACCESS iScience 24, 102998, September 24, 2021 21 iScience Review more sustainable circular economy. Furthermore, a wide range of targeted products (such as methane, alkanes, alcohols, and carboxylic acids) could be produced through the use of versatile biocatalysts in MES, and the production of C2ÀC6 monocarboxylic acids by MES has been demonstrated at technology readiness level of 1-3 (Dessì et al, 2021;Jourdin and Burdyny, 2020;Lin et al, 2021a).…”

Section: Ll Open Accessmentioning

confidence: 99%

Emerging bioelectrochemical technologies for biogas production and upgrading in cascading circular bioenergy systems

et al. 2021

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Biomethane is suggested as an advanced biofuel for the hard-to-abate sectors such as heavy transport. However, future systems that optimize the resource and production of biomethane have yet to be definitively defined. This paper assesses the opportunity of integrating anaerobic digestion (AD) with three emerging bioelectrochemical technologies in a circular cascading bioeconomy, including for power-to-gas AD (P2G-AD), microbial electrolysis cell AD (MEC-AD), and AD microbial electrosynthesis (AD-MES). The mass and energy flow of the three bioelectrochemical systems are compared with the conventional AD amine scrubber system depending on the availability of renewable electricity. An energy balance assessment indicates that P2G-AD, MEC-AD, and AD-MES circular cascading bioelectrochemical systems gain positive energy outputs by using electricity that would have been curtailed or constrained (equivalent to a primary energy factor of zero). This analysis of technological innovation, aids in the design of future cascading circular biosystems to produce sustainable advanced biofuels.

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“…Among these, MFCs are expected to be applied to power generation from biomass wastes [10], while MECs are designed to generate hydrogen gas, CO 2 -free clean energy, at high efficiencies [11]. MES is also attractive in its sustainable production of organic compounds from CO 2 [12]. Since EAB play pivotal roles in these BESs, researchers focus their efforts to understand the physiology and genetics of EAB for better utilizing these bacteria in BESs.…”

Section: Introductionmentioning

confidence: 99%

Shewanella oneidensis MR-1 as a bacterial platform for electro-biotechnology

Ikeda

Takamatsu

Tsuchiya

et al. 2021

Essays in Biochemistry

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The genus Shewanella comprises over 70 species of heterotrophic bacteria with versatile respiratory capacities. Some of these bacteria are known to be pathogens of fishes and animals, while many are non-pathogens considered to play important roles in the global carbon cycle. A representative strain is Shewanella oneidensis MR-1 that has been intensively studied for its ability to respire diverse electron acceptors, such as oxygen, nitrate, sulfur compounds, metals, and organics. In addition, studies have been focused on its ability as an electrochemically active bacterium that is capable of discharging electrons to and receiving electrons from electrodes in bioelectrochemical systems (BESs) for balancing intracellular redox states. This ability is expected to be applied to electro-fermentation (EF) for producing value-added chemicals that conventional fermentation technologies are difficult to produce efficiently. Researchers are also attempting to utilize its electrochemical ability for controlling gene expression, for which electro-genetics (EG) has been coined. Here we review fundamental knowledge on this bacterium and discuss future directions of studies on its applications to electro-biotechnology (EB).

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Microbial electrosynthesis: Towards sustainable biorefineries for production of green chemicals from CO2 emissions

Cited by 126 publications

References 162 publications

Efficient Hydrogen Delivery for Microbial Electrosynthesis via 3D-Printed Cathodes

Efficient Hydrogen Delivery for Microbial Electrosynthesis via 3D-Printed Cathodes

Emerging bioelectrochemical technologies for biogas production and upgrading in cascading circular bioenergy systems

Shewanella oneidensis MR-1 as a bacterial platform for electro-biotechnology

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