Impact of Carbon Felt Electrode Pretreatment on Anodic Biofilm Composition in Microbial Electrolysis Cells

Spiess, Sabine; Kučera, Jiří; Seelajaroen, Hathaichanok; Sasiain, Amaia; Thallner, Sophie; Kremser, Klemens; Novak, David P.; Guebitz, Georg M.; Haberbauer, Marianne

doi:10.3390/bios11060170

Cited by 17 publications

(20 citation statements)

References 73 publications

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“…Graphite felt is still very promising anode material for MEC. A most recent study has achieved a production rate of 0.44 mmol/L/d along with 75% CE while using pretreated graphite felt as anode material in single chamber MEC system 72 …”

Section: Performance Efficiency Comparisonmentioning

confidence: 99%

Performance efficiency comparison of microbial electrolysis cells for sustainable production of biohydrogen—A comprehensive review

Muddasar

Liaquat

Aslam

et al. 2022

Intl J of Energy Research

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Summary Microbial electrolysis cells (MECs) are one of the most promising innovation amongst bio‐electrochemical systems for biohydrogen production. A wide variety of wastewaters and organic wastes that is, sodium acetate, glucose, glycerol, domestic wastewater, sugar industries effluent, food processing wastewater, industrial wastewater, etc. can be utilized as substrates in MEC. The objective of this comprehensive review is to study the effects of reactor configuration, electrode materials, and substrates on the maximum hydrogen production rate (HPR) and columbic efficiency (CE) of the MEC system. The obtained results were summarized based on reactor configuration, substrate concentration, electrodes, applied voltage, HPR, and CE. Despite this significant progress, MEC technology still requires substantial developments to be recognized as a commercially viable technology. At the end of this review, the most promising future perspectives were also discussed which could be the appealing solutions for various problems associated with MEC technology. This review supports energy engineers and researchers to analyze the performance of various MECs for future assistance in research.

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Section: Performance Efficiency Comparisonmentioning

confidence: 99%

Performance efficiency comparison of microbial electrolysis cells for sustainable production of biohydrogen—A comprehensive review

Muddasar

Liaquat

Aslam

et al. 2022

Intl J of Energy Research

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“…The experiments were performed in two-chamber H-cells with a working volume of 220 ml each, separated by a pretreated proton exchange membrane (Nafion 117, Chemours, Wilmington, DE, United States), as previously described (Spiess et al, 2021). Two MECs were set up and referred to as MEC1 and MEC2.…”

Section: Mec Setupmentioning

confidence: 99%

“…Carbon felt (projected surface area 15 cm 2 , Alfa Aesar, Heysham, United Kingdom) was selected as an electrode material. Prior to use, the carbon felt electrodes were pretreated with isopropanol and hydrogen peroxide as described elsewhere (Spiess et al, 2021). Titanium wires (0.25 mm, Alfa Aesar, Heysham, United Kingdom) were used to enable the external electrical connection.…”

Section: Mec Setupmentioning

confidence: 99%

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Bioelectrochemical methanation by utilization of steel mill off-gas in a two-chamber microbial electrolysis cell

Spiess¹,

Conde²,

Kučera

et al. 2022

Front. Bioeng. Biotechnol.

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Carbon capture and utilization has been proposed as one strategy to combat global warming. Microbial electrolysis cells (MECs) combine the biological conversion of carbon dioxide (CO2) with the formation of valuable products such as methane. This study was motivated by the surprising gap in current knowledge about the utilization of real exhaust gas as a CO2 source for methane production in a fully biocatalyzed MEC. Therefore, two steel mill off-gases differing in composition were tested in a two-chamber MEC, consisting of an organic substrate-oxidizing bioanode and a methane-producing biocathode, by applying a constant anode potential. The methane production rate in the MEC decreased immediately when steel mill off-gas was tested, which likely inhibited anaerobic methanogens in the presence of oxygen. However, methanogenesis was still ongoing even though at lower methane production rates than with pure CO2. Subsequently, pure CO2 was studied for methanation, and the cathodic biofilm successfully recovered from inhibition reaching a methane production rate of 10.8 L m−2d−1. Metagenomic analysis revealed Geobacter as the dominant genus forming the anodic organic substrate-oxidizing biofilms, whereas Methanobacterium was most abundant at the cathodic methane-producing biofilms.

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“…Using bioanode systems along with a chemical cathode in electrosynthesis is currently in demand [52]. H 2 can be generated with the help of platinum cathode MEC, the pH increases by consuming protons at the cathode.…”

Section: Electrosynthesis Assisted By Microbesmentioning

confidence: 99%

Valorisation of CO2 into Value-Added Products via Microbial Electrosynthesis (MES) and Electro-Fermentation Technology

et al. 2021

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Microbial electrocatalysis reckons on microbes as catalysts for reactions occurring at electrodes. Microbial fuel cells and microbial electrolysis cells are well-known in this context; both prefer the oxidation of organic and inorganic matter for producing electricity. Notably, the synthesis of high energy-density chemicals (fuels) or their precursors by microorganisms using bio-cathode to yield electrical energy is called Microbial Electrosynthesis (MES), giving an exceptionally appealing novel way for producing beneficial products from electricity and wastewater. This review accentuates the concept, importance and opportunities of MES, as an emerging discipline at the nexus of microbiology and electrochemistry. Production of organic compounds from MES is considered as an effective technique for the generation of various beneficial reduced end-products (like acetate and butyrate) as well as in reducing the load of CO2 from the atmosphere to mitigate the harmful effect of greenhouse gases in global warming. Although MES is still an emerging technology, this method is not thoroughly known. The authors have focused on MES, as it is the next transformative, viable alternative technology to decrease the repercussions of surplus carbon dioxide in the environment along with conserving energy.

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Impact of Carbon Felt Electrode Pretreatment on Anodic Biofilm Composition in Microbial Electrolysis Cells

Cited by 17 publications

References 73 publications

Performance efficiency comparison of microbial electrolysis cells for sustainable production of biohydrogen—A comprehensive review

Performance efficiency comparison of microbial electrolysis cells for sustainable production of biohydrogen—A comprehensive review

Bioelectrochemical methanation by utilization of steel mill off-gas in a two-chamber microbial electrolysis cell

Valorisation of CO2 into Value-Added Products via Microbial Electrosynthesis (MES) and Electro-Fermentation Technology

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