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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00127472" target="_blank" >RIV/00216224:14310/22:00127472 - isvavai.cz</a>

Result on the web

<a href="https://www.frontiersin.org/articles/10.3389/fbioe.2022.972653/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/fbioe.2022.972653/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fbioe.2022.972653" target="_blank" >10.3389/fbioe.2022.972653</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20801 - Environmental biotechnology

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Frontiers in Bioengineering and Biotechnology

ISSN

2296-4185

e-ISSN

2296-4185

Volume of the periodical

10

Issue of the periodical within the volume

September

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

1-13

UT code for WoS article

000859093400001

EID of the result in the Scopus database

2-s2.0-85138830400