Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.watres.2025.124599 |
Lizenz  |
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| Titel (primär) | Rapid growth of thermophilic bacteria during a high-temperature aquifer thermal energy storage (HT-ATES) field experiment |
| Autor | Keller, N.S.; Lüders, K.; Hornbruch, G.; Nordbeck, G.; Bauer, S.; Dahmke, A.; Richnow, H.H.; Vogt, C. |
| Quelle | Water Research |
| Erscheinungsjahr | 2025 |
| Department | TECH |
| Sprache | englisch |
| Topic | T7 Bioeconomy T8 Georesources |
| Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0043135425015027-mmc1.docx https://ars.els-cdn.com/content/image/1-s2.0-S0043135425015027-mmc2.xlsx https://ars.els-cdn.com/content/image/1-s2.0-S0043135425015027-mmc3.xlsx https://ars.els-cdn.com/content/image/1-s2.0-S0043135425015027-mmc4.xlsx |
| Keywords | Shallow aquifer; groundwater microbiome; aquifer thermal energy storage; heat stress; Bacillota |
| Abstract | High-temperature aquifer thermal energy storage (HT-ATES) of excess heat is an approach to balance seasonal differences in energy supply and demand while reducing greenhouse gas emissions in the heating and cooling sector. When operating HT-ATES in the shallow subsurface, ambient temperatures of aquifers in temperate zones are far exceeded. Little is known about how the microflora changes under field conditions during an HT-ATES operation. Therefore, we monitored the succession of the aquifer microbial community in an HT-ATES field experiment carried out in a shallow (< 20 m) quaternary aquifer consisting of the following phases repeated three times: extraction of groundwater from the site and heating it to ∼80°C on site, injection into the aquifer and storing it in situ for 21 days, recovery, cooling down and re-injection into the aquifer. Immediate changes in microbial community composition were observed in groundwater samples taken from the mostly heat-affected areas reaching temperatures of up to 70°C, with increased abundances of thermophilic eubacteria belonging mainly to less characterized members of the phylum Bacillota. We assume these organisms survived as non-active but viable spores under natural conditions and grew quickly during heat treatment, probably by using leached dissolved organic matter as carbon and energy sources. In addition, partially higher total cell counts were detected in groundwater samples taken from moderately warmed aquifer zones (20 to 40°C) compared to non-affected control areas (∼10°C) or areas warmer than 40°C, indicating an increased growth of mesophilic microorganisms. In summary, our results suggest that any HT-ATES operation with temperature increases up to 80°C will be accompanied by quick growth of various thermophilic microorganisms using metabolic pathways predetermined by the geochemical conditions of the local aquifer. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31324 |
| Keller, N.S., Lüders, K., Hornbruch, G., Nordbeck, G., Bauer, S., Dahmke, A., Richnow, H.H., Vogt, C. (2025): Rapid growth of thermophilic bacteria during a high-temperature aquifer thermal energy storage (HT-ATES) field experiment Water Res. 10.1016/j.watres.2025.124599 |
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