Bioelectromethanogenesis reaction in a tubular Microbial Electrolysis Cell (MEC) for biogas upgrading

Zeppilli, Marco; Cristiani, Lorenzo; Dell’Armi, Edoardo; Majone, Mauro

doi:10.1016/j.renene.2020.05.122

Cited by 46 publications

(12 citation statements)

References 34 publications

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“…All the parameters evaluated in this work have been already described in previous research, namely, electrodic reactions efficiencies [28,29], CO 2 removal and its mass balance [25], potential evolution description [30], and energy consumption evaluation [31]. Tab.…”

Section: Calculationsmentioning

confidence: 99%

Electron Recycle Concept in a Microbial Electrolysis Cell for Biogas Upgrading

2021

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An innovative strategy to control the metabolism of microorganisms is offered by bioelectrochemical systems in which a graphite-based cathode can be used as electron donor or acceptor. An advanced microbial electrolysis cell is developed to combine CO 2 removal from a synthetic biogas in a biocathode and the organic matter oxidation in a bioanode. A novel biogas upgrading approach is presented in which an electron recycle concept is obtained by the combination of CO 2 reduction and oxidation. While the bioelectrochemical anodic chemical oxygen demand oxidation provides the electrons necessary for the cathodic CO 2 reduction into methane and acetate, the acetate produced by acetogenic microorganisms migrates from the cathode to the anode being oxidized again by the bioanode.

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Section: Calculationsmentioning

confidence: 99%

Electron Recycle Concept in a Microbial Electrolysis Cell for Biogas Upgrading

2021

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“…In particular, the bio-cathode produces hydrogen in concentrations suitable for the proceeding of the biological RD. Recently, different MEC configurations were developed for bioremediation applications, with results that make them applicable on a full scale [31][32][33][34]. In this work, a Dhc-enriched culture was tested by investigating three types of electron donors release, which corresponded to lactate, hydrogen, and a bioelectrochemical configuration.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Bioelectrochemical Approach and Different Electron Donors for Biological Trichloroethylene Reductive Dechlorination

Dell’Armi

Rossi

Taverna

et al. 2022

Toxics

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Trichloroethylene (TCE) and more in general chlorinated aliphatic hydrocarbons (CAHs) can be removed from a contaminated matrix thanks to microorganisms able to perform the reductive dechlorination reaction (RD). Due to the lack of electron donors in the contaminated matrix, CAHs’ reductive dechlorination can be stimulated by fermentable organic substrates, which slowly release molecular hydrogen through their fermentation. In this paper, three different electron donors constituted by lactate, hydrogen, and a biocathode of a bioelectrochemical cell have been studied in TCE dechlorination batch experiments. The batch reactors evaluated in terms of reductive dechlorination rate and utilization efficiency of the electron donor reported that the bio-electrochemical system (BES) showed a lower RD rate with respect of lactate reactor (51 ± 9 µeq/d compared to 98 ± 4 µeq/d), while the direct utilization of molecular hydrogen gave a significantly lower RD rate (19 ± 8 µeq/d), due to hydrogen low solubility in liquid media. The study also gives a comparative evaluation of the different electron donors showing the capability of the bioelectrochemical system to reach comparable efficiencies with a fermentable substrate without the use of other chemicals, 10.7 ± 3.3% for BES with respect of 3.5 ± 0.2% for the lactate-fed batch reactor. This study shows the BES capability of being an alternative at classic remediation approaches.

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“…20 Typically, carbon-based materials, such as carbon cloths, graphite fiber brushes, carbon paper, graphite rods and granular graphite, are used in both cathode and anode chambers of BESs when studying electromethanogenesis. 13,14,21,22 Another crucial factor affecting the performance of a biocathode is the origin and acclimation conditions of the microorganisms. Xu et al 23 used anaerobic granular sludge (that had been initially fed with glucose) as an inoculum and the cathode potential was poised at −0.7 V versus SHE.…”

Section: Introductionmentioning

confidence: 99%

“…Fu et al 18 inoculated the cathode chamber with anaerobic activated sludge from a municipal wastewater treatment factory (initially supplemented with sodium acetate) and poised the biocathode at −0.5 V versus SHE. Finally, Zeppilli et al 22 inoculated the cathode chamber with anaerobic sludge from a thermophilic anaerobic digester. However, it is not clear to what extent the inoculum source can affect the operation of a BES.…”

Section: Introductionmentioning

confidence: 99%

Effect of applied potential on the performance of an electroactive methanogenic biocathode used for bioelectrochemical CO₂ reduction to CH₄

Vasiliadou

Kalogiannis

Spyridonidis

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Biogas can be upgraded to biomethane, which can be used as vehicle fuel and natural gas substitute. Bioelectrochemical biogas upgrade is an innovative alternative to energy-consuming physicochemical processes and bio-upgrade methods which require H 2 supply. Bioelectrochemical biogas upgrade is conducted by methanogenic microorganisms that convert CO 2 into CH 4 , in the biocathode of a bioelectrochemical system (BES), using electric current as energy source. The aim of the present work was to study the efficiency of an H-type BES in the conversion of CO 2 into CH 4 , by applying different potentials at the electromethanogenic biocathode.RESULTS: The H-type BES was operated in a three-electrode configuration (working: graphite rod; counter: Pt/Ti; reference: Ag/AgCl) with a potentiostat, which set the biocathode's potential initially at −0.7 V versus a standard hydrogen electrode (SHE) and monitored the current demand. Based on cyclic voltammetry runs, a highly electroactive methanogenic biocathode was developed in a short time. The methane production rate (MPR) at a cathode potential of −0.7 V versus SHE was 31.1 mmol m −2 d −1 , with an electron capture efficiency of 77.6%. The efficiency of the BES was reduced by applying a potential of −0.5 V versus SHE at the biocathode, resulting in negligible CH 4 production. The BES achieved its maximum performance at a potential of −0.9 V versus SHE with a MPR of 53.8 mmol m −2 d −1 and an electron capture efficiency of 86%. The CO 2 consumption rate achieved was 0.8 mmol d −1 .CONCLUSIONS: The H-type BES achieved an effective biolectrochemically driven methane production, while the biocathode electroactive behavior was evaluated during the whole operation of the system.

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Bioelectromethanogenesis reaction in a tubular Microbial Electrolysis Cell (MEC) for biogas upgrading

Cited by 46 publications

References 34 publications

Electron Recycle Concept in a Microbial Electrolysis Cell for Biogas Upgrading

Electron Recycle Concept in a Microbial Electrolysis Cell for Biogas Upgrading

Evaluation of the Bioelectrochemical Approach and Different Electron Donors for Biological Trichloroethylene Reductive Dechlorination

Effect of applied potential on the performance of an electroactive methanogenic biocathode used for bioelectrochemical CO₂ reduction to CH₄

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Bioelectromethanogenesis reaction in a tubular Microbial Electrolysis Cell (MEC) for biogas upgrading

Cited by 46 publications

References 34 publications

Electron Recycle Concept in a Microbial Electrolysis Cell for Biogas Upgrading

Electron Recycle Concept in a Microbial Electrolysis Cell for Biogas Upgrading

Evaluation of the Bioelectrochemical Approach and Different Electron Donors for Biological Trichloroethylene Reductive Dechlorination

Effect of applied potential on the performance of an electroactive methanogenic biocathode used for bioelectrochemical CO2 reduction to CH4

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Effect of applied potential on the performance of an electroactive methanogenic biocathode used for bioelectrochemical CO₂ reduction to CH₄