Utilization of dissolved CO 2 to control methane and acetate production in methanation reactor.

Autor: Paillet F; SUEZ Groupe, CIRSEE, 38 rue du Président Wilson, 78 230 Le Pecq, France. Electronic address: florian.paillet@suez.com., Crestey E; SUEZ Groupe, CIRSEE, 38 rue du Président Wilson, 78 230 Le Pecq, France., Gaval G; SUEZ Groupe, CIRSEE, 38 rue du Président Wilson, 78 230 Le Pecq, France., Haddad M; SUEZ International, SUEZ Engineering & Construction, Tour CB21 - 16 place de l'Iris, 92040 Paris La Défense, France., Lebars F; SUEZ Groupe, CIRSEE, 38 rue du Président Wilson, 78 230 Le Pecq, France., Nicolitch O; SUEZ Groupe, CIRSEE, 38 rue du Président Wilson, 78 230 Le Pecq, France., Camacho P; SUEZ Groupe, CIRSEE, 38 rue du Président Wilson, 78 230 Le Pecq, France.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 Nov 01; Vol. 416, pp. 131722. Date of Electronic Publication: 2024 Nov 01.
DOI: 10.1016/j.biortech.2024.131722
Abstrakt: This study investigated the influence of dissolved CO 2 on the selection of metabolic pathway using a methanation membrane bioreactor supplied with H 2 /CO 2 . Various ratios of H 2 /CO 2 were applied (3.3, 3.8, 4.0, 4.5, and 5.0 (v/v)) to manipulate dissolved CO 2 levels in the medium. The findings revealed a correlation between the concentration of dissolved CO 2 and the production of CH 4 (positive) and acetate (negative). Specifically, at a dissolved concentration of CO 2 above 2.0 ± 0.2 mmol/L, production of CH 4 was favored. At the opposite, acetate production was favored at lower dissolved CO 2 concentrations, with a maximum concentration of 1.9 g/L observed at 0.9 mmol/L of dissolved CO 2 . This study demonstrates that the modification of dissolved CO 2 levels in a methanation bioreactor can provide a strategy for the selection of metabolic pathways and microbial communities, thereby offering a promising opportunity for optimizing the conversion of CO 2 into high-value products such as CH 4 and acetate.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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