Efficient enriching high-performance denitrifiers using bio-cathode of microbial fuel cells
| Autor: | Ruitao Li, Xiang-peng Ren, Xinxin Fan, Zhen Zhang, Tian-peng Gao, Ying Liu |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | iScience, Vol 27, Iss 10, Pp 110965- (2024) |
| Druh dokumentu: | article |
| ISSN: | 2589-0042 36138444 |
| DOI: | 10.1016/j.isci.2024.110965 |
| Popis: | Summary: Recent advancements in microbial fuel cells (MFC) technology have significantly contributed to the development of bio-cathode denitrification as a promising method for eco-friendly wastewater treatment. This study utilized an efficient repeated replacement method to enrich a mixed bio-cathode denitrifying culture (MBD) within a bio-cathode MFC, achieving a stable maximum output voltage of 120 ± 5 mV and a NO3−-N removal efficiency of 69.99 ± 0.60%. The electrotrophic denitrification process appears to be facilitated by electron shuttles. Microbial community analysis revealed a predominance of Proteobacteria, with Paracoccus and Pseudomonas as functional genera. Additionally, the isolated strain Lyy (belonging to Stutzerimonas) from MBD demonstrated exceptional denitrification efficiencies exceeding 98% when treating wastewater with a broad range of C/N (2–12) ratios and KNO3 concentrations (500–3000 mg/L) within 60 h. These results demonstrated the effectiveness of the repeated replacement method in enriching bio-cathode denitrifiers and advancing MFC application in sustainable wastewater management. |
| Databáze: | Directory of Open Access Journals |
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