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PubMed Publications| Keyword search (4,163 papers available) |  |
"race" Keyword-tagged Publications:
| Title: | Engineered iron-sulfur carriers for efficient mixotrophic and sulfur autotrophic denitrification in low carbon to nitrogen ratio municipal wastewater: Mechanisms of biofilm enhancement and electron transfer promotion | ||||
| Authors: | Yu S, Zhang X, Guo T, Li H, Liu W, Chen Z, Wang X, Ren B, Guo J | ||||
| Link: | https://pubmed.ncbi.nlm.nih.gov/40712941/ | ||||
| DOI: | 10.1016/j.biortech.2025.133020 | ||||
| Publication: | Bioresource technology | ||||
| Keywords: | Dual role; Electron transfer; Extracellular polymeric substances; Iron-sulfur-modified carriers; Metabolic activity; Nitrate bioreduction; | ||||
| PMID: | 40712941 | Category: | Date Added: | 2025-07-28 | |
| Dept Affiliation: |
ENCS
1 School of Environmental and Municipal Engineering, Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China. 2 School of Civil Engineering and Architecture, Taizhou University, Taizhou 318000, China. 3 Department of Building, Civil, and Environmental Engineering, Concordia University, 1455 de Maisonneuve Blvd. W. Montreal, Quebec, Canada. 4 School of Civil Engineering and Architecture, Taizhou University, Taizhou 318000, China. Electronic address: jianbguo@163.com. |
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Description: |
Sulfur autotrophic denitrification (SAD) offers a sustainable solution for nitrogen removal in low carbon to nitrogen ratio (C/N) municipal wastewater, yet its efficiency and startup time pose significant challenges. To overcome these, we developed iron-sulfur-modified carriers (FeS@MC) and integrated them into an in-situ sequencing batch reactor (S-Fe-SBR), which successfully achieved rapid startup (16 days) of SAD under low C/N conditions. The mechanisms revealed that FeS@MC's hierarchical porous structure promoted biofilm colonization and selective enrichment of sulfur-oxidizing bacteria (e.g.,Thiobacillus). FeS@MC stimulated extracellular polymeric substance (EPS) secretion to amplify sulfur oxidation gene expression (soxA: 126 % enrichment). Moreover, FeS@MC enhanced microbial electron transfer capacity, nitrate reductase activity and synergistically boosted denitrification kinetics, establishing a robust mixotrophic denitrification pathway for high total nitrogen removal efficiency. Our findings propose a novel carrier design paradigm by leveraging iron-sulfur carriers' dual role to optimize biofilm functionality and redox balance, promoting sustainable SAD application in carbon-constrained wastewater treatment. |
