A comparison of microbial and bioelectrochemical approaches for biogas upgrade through carbon dioxide conversion to methane

Tartakovsky, B.; Lebrun, F.; Guiot, Serge R.; Bock, Christina

doi:10.1016/j.seta.2021.101158

Cited by 7 publications

(5 citation statements)

References 36 publications

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“…Therefore current research intends to lower the usage of Pt or replace it with other metals [150]. Promising alternatives are nickel (Ni) [103], titanium (Ti) [151] and stainless steel (SS) [55] as electrode materials. Other metals, like gold, silver, copper, and iron, are great conductors (e.g., SS: 1.45 MS/m, copper: 59 MS/m) [152], but during the long-term application, their operational stability is low [138].…”

Section: Metal-based Electrodesmentioning

confidence: 99%

“…Hence the reduction of CO 2 is more efficient, resulting in higher product yield [4], lower CO 2 content [59] and a more stable reaction [176]. The electroactive microorganisms need special structures for electron conduction, like electroactive pili, c-type cytochromes or archaellum [141,177] Both mixed [42,83,151,156] and pure cultures [17,25,54,161,178] have been employed in BES applications. The first conclusive evidences for DEET and DIET was made with well-defined co-cultures [16,68].…”

Section: Microbial Backgroundmentioning

confidence: 99%

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Bioelectrochemical Systems (BES) for Biomethane Production—Review

et al. 2023

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Bioelectrochemical systems (BESs) have great potential in renewable energy production technologies. BES can generate electricity via Microbial Fuel Cell (MFC) or use electric current to synthesize valuable commodities in Microbial Electrolysis Cells (MECs). Various reactor configurations and operational protocols are increasing rapidly, although industrial-scale operation still faces difficulties. This article reviews the recent BES related to literature, with special attention to electrosynthesis and the most promising reactor configurations. We also attempted to clarify the numerous definitions proposed for BESs. The main components of BES are highlighted. Although the comparison of the various fermentation systems is, we collected useful and generally applicable operational parameters to be used for comparative studies. A brief overview links the appropriate microbes to the optimal reactor design.

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Section: Metal-based Electrodesmentioning

confidence: 99%

Section: Microbial Backgroundmentioning

confidence: 99%

Bioelectrochemical Systems (BES) for Biomethane Production—Review

et al. 2023

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Section: Improving Hydrogen Mass Transfer and Utilisation Efficiencymentioning

confidence: 99%

“…Usually, the external hydrogen addition in an in situ upgrading system leads to the accumulation of about 6 g/ litre of acetate (Tartakovsky et al 2021). This issue was not noticed in the bioelectrochemical system, proposed the bioelectrochemical system to be promising and of superior performance (Tartakovsky et al 2021). Moreover, electrochemical, or microbial hydrogen sulphide oxidation can remove the hydrogen sulphide produced from the raw substrates with sulphate or sulphur (Lai et al 2021;Ni et al 2019).…”

Section: Improving Hydrogen Mass Transfer and Utilisation Efficiencymentioning

confidence: 99%

Integration of biogas systems into a carbon zero and hydrogen economy: a review

et al. 2022

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The Ukraine conflict has put critical pressure on gas supplies and increased the price of fertilisers. As a consequence, biogas has gained remarkable attention as a local source of both gas for energy and biofertiliser for agriculture. Moreover, climate change-related damage incentivises all sectors to decarbonise and integrate sustainable practices. For instance, anaerobic digestion allows decarbonisation and optimal waste management. Incorporating a biogas system in each country would limit global warming to 2 °C. If suitable policies mechanisms are implemented, the biogas industry could reduce global greenhouse gas emissions by 3.29–4.36 gigatonnes carbon dioxide equivalent, which represent about 10–13% of global emissions. Here, we review the role of the biogas sector in capturing methane and mitigating carbon emissions associated with biogas outputs. Since biogas impurities can cause severe practical difficulties in biogas storing and gas grid delivering systems, we present upgrading technologies that remove or consume the carbon dioxide in raw biogas, to achieve a minimum of 95% methane content. We discuss the role of hydrogen-assisted biological biogas upgrading in carbon sequestration by converting carbon dioxide to biomethane via utilising hydrogen generated primarily through other renewable energy sources such as water electrolysis and photovoltaic solar facilities or wind turbines. This conceptual shift of 'power to gas' allows storing and utilising the excess of energy generated in grids. By converting carbon dioxide produced during anaerobic digestion into additional biomethane, biogas has the potential to meet 53% of the demand for fossil natural gas. We also evaluate the role of digestate from biogas systems in producing biochar, which can be used directly as a biofertiliser or indirectly as a biomethanation enhancement, upgrading, and cleaning material.

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“…In comparison to a reference reactor, the CH 4 yield doubled, resulting in 98% CH 4 content in the biogas, while the COD removal rate was increased three times (Bo et al 2014). Biogas upgrading was demonstrated in the cathode compartment of a membraneless microbial electrosynthesis cell, which significantly reduced the required biogas retention time as well as energy consumption for biogas upgrading compared to injection of H 2 through sparging or a biofilter approach (Tartakovsky et al 2021). A high efficiency in situ biogas upgrading bioelectrochemical system with low energy input for the treatment of artificial wastewater with acetate was developed by Liu et al (2021).…”

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confidence: 99%

The microbiology of Power-to-X applications

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Kleinsteuber

Kretzschmar

et al. 2023

FEMS Microbiology Reviews

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Power-to-X (P2X) technologies will play a more important role in the conversion of electric power to storable energy carriers, commodity chemicals and even food and feed. Among the different P2X technologies, microbial components form cornerstones of individual process steps. This review comprehensively presents the state-of-the-art of different P2X technologies from a microbiological standpoint. We are focusing on microbial conversions of hydrogen from water electrolysis to methane, other chemicals and proteins. We present the microbial toolbox needed to gain access to these products of interest, assess its current status and research needs, and discuss potential future developments that are needed to turn todays P2X concepts into tomorrow's technologies.

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A comparison of microbial and bioelectrochemical approaches for biogas upgrade through carbon dioxide conversion to methane

Cited by 7 publications

References 36 publications

Bioelectrochemical Systems (BES) for Biomethane Production—Review

Bioelectrochemical Systems (BES) for Biomethane Production—Review

Integration of biogas systems into a carbon zero and hydrogen economy: a review

The microbiology of Power-to-X applications

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