Academic Journal
Synergistic inhibition and microbial adaptation in anammox systems under long-term salinity and fulvic acid stress.
| Τίτλος: | Synergistic inhibition and microbial adaptation in anammox systems under long-term salinity and fulvic acid stress. |
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| Συγγραφείς: | Yin W; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China; Honghe Branch of Yunnan Hydrology and Water Resources Bureau, Mengzi 661100, China., Li Y; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China., Pan A; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China., Wu J; Zhejiang Anmox Environment Technology Co., Ltd, Hangzhou 310013, China., Su X; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China., Xiao X; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China., Dong F; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China., Xu L; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China., Chen C; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China., Fu H; Department of Environmental Engineering, China Jiliang University, Zhejiang, Hangzhou 310018, China., Sun F; Zhejiang Key Laboratory of Digital Intelligence Monitoring and Restoration of Watershed Environment, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China. Electronic address: faqian@zju.edu.cn. |
| Πηγή: | Bioresource technology [Bioresour Technol] 2026 Jul; Vol. 451, pp. 134498. Date of Electronic Publication: 2026 Mar 25. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Elsevier Applied Science Country of Publication: England NLM ID: 9889523 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-2976 (Electronic) Linking ISSN: 09608524 NLM ISO Abbreviation: Bioresour Technol Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Barking, Essex, England : New York, N.Y. : Elsevier Applied Science ; Elsevier Science Pub. Co., 1991- |
| Ιατρικοί όροι (MeSH): | Benzopyrans*/pharmacology , Adaptation, Physiological*/drug effects , Stress, Physiological*/drug effects , Anaerobic Ammonia Oxidation*/drug effects , Bacteria*/metabolism , Bacteria*/genetics , Bacteria*/drug effects , Ammonium Compounds*/metabolism , Salinity*, Bioreactors/microbiology ; Wastewater/chemistry ; Oxidation-Reduction ; Nitrogen |
| Περίληψη: | Salinity and fulvic acid frequently coexist in high-strength wastewater, yet their combined effects on anaerobic ammonium oxidation (anammox) remain unclear. This study evaluated their impacts on reactor performance, microbial community structure, and functional genes. Moderate salinity (5-10 g L-1 NaCl) slightly enhanced anammox activity, whereas higher salinity (15 g L-1) and fulvic acid (> 60 mg L-1) significantly inhibited nitrogen removal. Under such combined stress, specific anammox activity decreased by about 40%, indicating a synergistic inhibition. Extracellular polymeric substances increased by 198%, suggesting a microbial stress-response strategy. Microbial community analysis showed a decline in Planctomycetes by 11%, and enrichment of Proteobacteria by 7% and Chloroflexi by 4%. Metagenomic results revealed suppression of key anammox genes and enrichment of denitrification genes, with quorum sensing and polysaccharide biosynthesis genes increased, suggesting EPS-mediated adaptation under combined stress. These findings provide insights for improving anammox stability in saline and humic-rich wastewater treatment systems. (Copyright © 2026 Elsevier Ltd. All rights reserved.) |
| Competing Interests: | Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. |
| Contributed Indexing: | Keywords: Anaerobic ammonium oxidation; Combined stress; Extracellular polymeric substances; Inhibitory effects; Metagenomics |
| Substance Nomenclature: | XII14C5FXV (fulvic acid) 0 (Benzopyrans) 0 (Wastewater) N762921K75 (Nitrogen) 0 (Ammonium Compounds) |
| Entry Date(s): | Date Created: 20260327 Date Completed: 20260714 Latest Revision: 20260714 |
| Update Code: | 20260714 |
| DOI: | 10.1016/j.biortech.2026.134498 |
| PMID: | 41895455 |
| Βάση Δεδομένων: | MEDLINE |
| ISSN: | 1873-2976 |
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| DOI: | 10.1016/j.biortech.2026.134498 |