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Combining a robust thermophilic methanogen and packing material with high liquid hold-up to optimize biological methanation in trickle-bed reactors

  • The hydrogen gas-to-liquid mass transfer is the limiting factor in biological methanation. In trickle-bed reactors, mass transfer can be increased by high flow velocities in the liquid phase, by adding a packing material with high liquid hold-up or by using methanogenic archaea with a high methane productivity. This study developed a polyphasic approach to address all methods at once. Various methanogenic strains and packings were investigated from a microbial and hydrodynamic perspective. Analyzing the ability to produce high-quality methane and to form biofilms, pure cultures of Methanothermobacter performed better than those of the genus Methanothermococcus. Liquid and static hold-up of a packing material and its capability to facilitate attachment was not attributable to a single property. Consequently, it is recommended to carefully match organism and packing for optimized performance of trickle-bed reactors. The ideal combination for the ORBIT system was identified as Methanothermobacter thermoautotrophicus IM5 and DuraTop (R).

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Metadaten
Author:Anja Kaul, Andrea Boellmann, Martin Thema, Larissa Kalb, Richard Stoeckl, Harald Huber, Michael SternerORCiDGND, Annett BellackORCiD
DOI:https://doi.org/10.1016/j.biortech.2021.126524
Parent Title (English):Bioresource technology
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2022
Release Date:2022/02/01
Tag:BIOCATALYTIC METHANATION; CARBON-DIOXIDE; Liquid hold-up maximization; MASS-TRANSFER; Methane production; Methanothermobacter; Methanothermococcus; Optimized packing-organism combination; THERMOAUTOTROPHICUS; hydrogen
Volume:345
Article Number:126524
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Forschungsstelle für Energienetze und Energiespeicher (FENES) / Forschungsgruppe Energiespeicher
Begutachtungsstatus:peer-reviewed
research focus:Energie und Mobilität
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG