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Identification of Robust Thermophilic Methanogenic Archaea and Packing Material for High Liquid Hold-Up at Low Volumetric Gas Flow Rates for Use in Trickle-Bed Reactors for Biological Methanation

  • he hydrogen gas-to-liquid mass transfer is the limiting factor in biological methanation. In a trickle-bed reactor, 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 choosing methanogenic archaea with a high methane productivity. This study analyzed various packings and methanogenic strains from a hydrodynamic and microbial perspective. By analyzing twelve pure cultures of thermophilic methanogens for their ability to produce high quality methane and to form biofilms on different packings, strains of Methanothermobacter were found to perform better than thus of the genus Methanothermococcus. Best methane production and adherence was observed on DuraTop®, Bioflow 9, and filter foam. DuraTop® and Bioflow 9 had also a high dynamic liquid hold-up, but the maximum hold-up was determined for expanded clay. The ideal combination for use in the ORBIT-trickle-bed reactor was identified as Methanothermobacter thermoautotrophicus IM5 and DuraTop®.

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Metadaten
Author:Anja Kaul, Andrea Böllmann, Martin Thema, Larissa Kalb, Richard Stöckl, Harald Huber, Michael SternerORCiDGND, Annett BellackORCiD
DOI:https://doi.org/10.2139/ssrn.3940878
Parent Title (English):SSRN Electronic Journal
Document Type:Preprint
Language:English
Year of first Publication:2021
Release Date:2022/02/01
Tag:Liquid hold-up maximization; Methane production; Methanothermobacter; Methanothermococcus; Optimized packing-organism combination
Note:
final peer reviewed article published under: 
https://doi.org/10.1016/j.biortech.2021.126524
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Forschungsstelle für Energienetze und Energiespeicher (FENES) / Forschungsgruppe Energiespeicher
research focus:Energie und Mobilität
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG