- Titel
- Biomethanation of renewable hydrogen by reactor microbiomes
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-1057525
- Datum der Einreichung
- 12.11.2025
- Datum der Verteidigung
- 29.05.2026
- Abstract (EN)
- The use of fossil energy carriers not only drives climate change and impacts our health through air pollution, but its economic future is constrained by its limited availability on Earth. Hence, future energy systems shall rely on a bigger share of renewables such as solar and wind power. The energy transition could help defossilize the energy sector and aid curtailing the effects of climate change. The interconversion of electrical power to storable energy carriers is key for maximizing the efficiency of renewable energy sources. The power-to-gas (P2G) technology could be used to address the intermittency and fluctuation issue of wind and solar power. P2G can be done chemically or biologically. The chemical process uses catalysts at high temperature and pressure to convert H2 and CO2 into CH4, whereas the biological process operates at milder temperature and pressure operational conditions. This thesis focused on the ecophysiology of P2G with reactor microbiomes in closed model ecosystems. First, a microbial resource management strategy focusing on media composition enabled the selective production of methane with microbial communities. Second, flexible biomethanation with complex microbiota was demonstrated and functional resilience in a flexible process depends on factors such as the inoculum type, community structure and dominant methanogens. Third, the intermediate formate was produced during the process with mixed cultures as well as pure cultures. Fourth, high methanogenic community diversity was key to sustaining high and long-term biomethanation performance. In summary, this thesis provides new insights into the ecophysiology of complex methanogenic communities for future biotechnological application of P2G.
- Freie Schlagwörter (EN)
- Power to Gas, Ex situ biomethanation, Biomethane, Biological biogas upgrading, Anaerobic Digestion
- Klassifikation (DDC)
- 570
- Den akademischen Grad verleihende / prüfende Institution
- Universität Leipzig, Leipzig
- Version / Begutachtungsstatus
- angenommene Version / Postprint / Autorenversion
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa2-1057525
- Veröffentlichungsdatum Qucosa
- 01.07.2026
- Dokumenttyp
- Dissertation
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY 4.0