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).
Author: | Anja Kaul, Andrea Boellmann, Martin Thema, Larissa Kalb, Richard Stoeckl, Harald Huber, Michael SternerORCiDGND, Annett BellackORCiD |
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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 |