Carbon dioxide reduction by mixed and pure cultures in microbial electrosynthesis using an assembly of graphite felt and stainless steel as a cathode

Bajracharya, Suman; Heijne, Annemiek ter; Domínguez-Benetton, Xochitl; Vanbroekhoven, Karolien; Buisman, Cees J.N.; Strik, D.P.B.T.B.; Pant, Deepak

doi:10.1016/j.biortech.2015.05.081

Cited by 286 publications

(120 citation statements)

References 35 publications

(59 reference statements)

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“…A wild-type strain of C. pasteurianum was able to accept electrons from cathode during heterotrophic growth on glucose as well as glycerol leading to NADH-consuming compounds such as butanol and PDO [79]. Another species, Clostridium ljungdahlii was also found to convert CO 2 into acetate while ethanol, methane, and hydrogen were also produced in minor quantities [82]. Reduction of acetate to ethanol can also be achieved using methyl viologen (MV) mediator in the cathode chamber.…”

Section: Alcoholsmentioning

confidence: 98%

Electro-Fermentation in Aid of Bioenergy and Biopolymers

et al. 2018

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Abstract:The soaring levels of industrialization and rapid progress towards urbanization across the world have elevated the demand for energy besides generating a massive amount of waste. The latter is responsible for poisoning the ecosystem in an exponential manner, owing to the hazardous and toxic chemicals released by them. In the past few decades, there has been a paradigm shift from "waste to wealth", keeping the value of high organic content available in the wastes of biological origin. The most practiced processes are that of anaerobic digestion, leading to the production of methane. However; such bioconversion has limited net energy yields. Industrial fermentation targeting value-added bioproducts such as-H 2 , butanediols; polyhydroxyalkanoates, citric acid, vitamins, enzymes, etc. from biowastes/lignocellulosic substrates have been planned to flourish in a multi-step process or as a "Biorefinery". Electro-fermentation (EF) is one such technology that has attracted much interest due to its ability to boost the microbial metabolism through extracellular electron transfer during fermentation. It has been studied on various acetogens and methanogens, where the enhancement in the biogas yield reached up to 2-fold. EF holds the potential to be used with complex organic materials, leading to the biosynthesis of value-added products at an industrial scale.

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Section: Alcoholsmentioning

confidence: 98%

Electro-Fermentation in Aid of Bioenergy and Biopolymers

et al. 2018

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“…who used pure and mixed cultures for CO 2 reduction. In their investigations, they applied an assembly of graphite felt and stainless steel as the cathode for the generation of acetate and CH 4 from the conversion of bicarbonate 40. However, all of those approaches were performed using carbonate salts dissolved in the medium as the carbon source in place of or in addition to gaseous CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Bio‐Electrocatalytic Application of Microorganisms for Carbon Dioxide Reduction to Methane

et al. 2016

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We present a study on a microbial electrolysis cell with methanogenic microorganisms adapted to reduce CO2 to CH4 with the direct injection of electrons and without the artificial addition of H2 or an additional carbon source except gaseous CO2. This is a new approach in comparison to previous work in which both bicarbonate and gaseous CO2 served as the carbon source. The methanogens used are known to perform well in anaerobic reactors and metabolize H2 and CO2 to CH4 and water. This study shows the biofilm formation of those microorganisms on a carbon felt electrode and the long‐term performance for CO2 reduction to CH4 using direct electrochemical reduction. CO2 reduction is performed simply by electron uptake with gaseous CO2 as the sole carbon source in a defined medium. This “electrometabolism” in such microbial electrolysis cells depends strongly on the potential applied as well as on the environmental conditions. We investigated the performance using different adaption mechanisms and a constant potential of −700 mV vs. Ag/AgCl for CH4 generation at 30–35 °C. The experiments were performed by using two‐compartment electrochemical cells. Production rates with Faradaic efficiencies of around 22 % were observed.

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“…In this context, microbial electrosynthesis could be a less energy intensive and sustainable solution for electricity-driven fuel and chemical production. In recent studies, small amounts of ethanol and butyrate production have been reported as secondary products in MES, from CO 2 reduction using lithoautotrophs [91] whereas the heterotrophic production of ethanol from acetate as the substrate has been demonstrated at the cathode of BES [192]. Most of the MES studies on CO 2 reduction reported H 2 evolution at the cathode as a mediator for the microbial CO 2 reduction [85,91,181].…”

Section: Other Chemicalsmentioning

confidence: 99%

“…In recent studies, small amounts of ethanol and butyrate production have been reported as secondary products in MES, from CO 2 reduction using lithoautotrophs [91] whereas the heterotrophic production of ethanol from acetate as the substrate has been demonstrated at the cathode of BES [192]. Most of the MES studies on CO 2 reduction reported H 2 evolution at the cathode as a mediator for the microbial CO 2 reduction [85,91,181]. As an alternative to H 2 -driven MES for CO 2 fixation, an innovative strategy has been suggested that uses formic acid (HCOOH) as an energy carrier [193].…”

Section: Other Chemicalsmentioning

confidence: 99%

“…The bioelectrosynthesis process can be highly specific, depending on the biocatalyst catalyzing the redox reaction and the terminal electron acceptor involved in the process, along with the electrochemically active redox mediators or suitable reducing equivalents. Biocathodes are the key components of microbial electrosynthesis, where the electrode oxidizing microorganisms are involved in the formation of reduced value-added product such as acetate, ethanol, butyrate [91]. MES refers to the production of chemical compounds in an electrochemical cell by electricity-driven CO 2 reduction as well as reduction/oxidation of other organic feedstocks using microbes as biocatalyst [8].…”

Section: Microbial Electrosynthesis (Mes)mentioning

confidence: 99%

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Microbial electrosynthesis of biochemicals : innovations on biocatalysts, electrodes and ion-exchange for CO2 supply, chemicals production and separation

Bajracharya¹

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Carbon dioxide reduction by mixed and pure cultures in microbial electrosynthesis using an assembly of graphite felt and stainless steel as a cathode

Cited by 286 publications

References 35 publications

Electro-Fermentation in Aid of Bioenergy and Biopolymers

Electro-Fermentation in Aid of Bioenergy and Biopolymers

Bio‐Electrocatalytic Application of Microorganisms for Carbon Dioxide Reduction to Methane

Microbial electrosynthesis of biochemicals : innovations on biocatalysts, electrodes and ion-exchange for CO2 supply, chemicals production and separation

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