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Title (Primary) Sulfidic acetate mineralization at 45°C by an aquifer microbial community: key players and effects of heat changes on activity and community structure
Author Bin Hudari, M.S.; Vogt, C.; Richnow, H.H.
Journal Environmental Microbiology
Year 2022
Department ISOBIO
Volume 24
Issue 1
Page From 370
Page To 389
Language englisch
Topic T7 Bioeconomy
Supplements https://sfamjournals.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1111%2F1462-2920.15852&file=emi15852-sup-0001-Supinfo.docx
Abstract High-Temperature Aquifer Thermal Energy Storage (HT-ATES) is a sustainable approach for integrating thermal energy from various sources into complex energy systems. Temperatures ≥45°C, which are relevant in impact zones of HT-ATES systems, may dramatically influence the structure and activities of indigenous aquifer microbial communities. Here, we characterized an acetate-mineralizing, sulfate-reducing microbial community derived from an aquifer and adapted to 45°C. Acetate mineralization was strongly inhibited at temperatures ≤25°C and 60°C. Prolonged incubation at 12°C and 25°C resulted in acetate mineralization recovery after 40–80 days whereas acetate was not mineralized at 60°C within 100 days. Cultures pre-grown at 45°C and inhibited for 28 days by incubation at 12°C, 25°C, or 60°C recovered quickly after changing the temperature back to 45°C. Phylotypes affiliated to the order Spirochaetales and to endospore-forming sulfate reducers of the order Clostridiales were highly abundant in microcosms being active at 45°C highlighting their key role. In summary, prolonged incubation at 45°C resulted in active microbial communities mainly consisting of organisms adapted to temperatures between the typical temperature range of mesophiles and thermophiles and being resilient to temporary heat changes.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=25365
Bin Hudari, M.S., Vogt, C., Richnow, H.H. (2022):
Sulfidic acetate mineralization at 45°C by an aquifer microbial community: key players and effects of heat changes on activity and community structure
Environ. Microbiol. 24 (1), 370 - 389