Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.jece.2025.120740 |
| Document | author version |
| Title (Primary) | Temperature-driven microbial dynamics and functional shifts in a pilot-scale partial nitrification/anammox reactor treating low-ammonium rare earth tailwater |
| Author | Zhang, Y.; Wang, Z.; Li, J.; Chen, Y.; Yang, J.; Li, Y.; Qin, J.; Zhang, H.; Qiu, G.; Wang, X. |
| Source Titel | Journal of Environmental Chemical Engineering |
| Year | 2026 |
| Department | TECH |
| Volume | 14 |
| Issue | 1 |
| Page From | art. 120740 |
| Language | englisch |
| Topic | T7 Bioeconomy |
| Supplements | Supplement 1 |
| Keywords | Partial nitrification/anammox; Bacteria activity; Metagenomic; Temperature shock |
| Abstract | This study fills a critical research gap by evaluating the year-round performance of a pilot-scale partial nitrification/anammox (PN/A) reactor treating low-ammonium rare earth tailwater (90.46 ± 13.62 mg/L) under seasonal temperature fluctuations. Operated without thermal insulation, the system achieved a peak total nitrogen removal efficiency of 87.5 % during warm periods, while experiencing a 58.4 % decline in winter. Microbial analyses revealed that all core functional groups were affected by cold stress. Notably, the PN reactor maintained suppression of nitrite-oxidizing bacteria, preserving community structure integrity, with Nitrosomonas maintaining 11.46 % relative abundance. In contrast, Candidatus Brocadia declined from 15.26 % to 4.89 %, while denitrifying bacteria exhibited stronger cold tolerance and maintained nitrogen removal via denitrification. Pathway and electron transport analyses confirmed a functional shift from anammox to denitrification during low-temperature periods. The findings offer practical insights into improving PN/A stability under seasonal variation and provide guidance for advancing its engineering application in the treatment of low-ammonium wastewater. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31966 |
| Zhang, Y., Wang, Z., Li, J., Chen, Y., Yang, J., Li, Y., Qin, J., Zhang, H., Qiu, G., Wang, X. (2026): Temperature-driven microbial dynamics and functional shifts in a pilot-scale partial nitrification/anammox reactor treating low-ammonium rare earth tailwater J. Environ. Chem. Eng. 14 (1), art. 120740 10.1016/j.jece.2025.120740 |
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