1. Harnessing electroactive microbial community for energy recovery from refining wastewater in microbial fuel cells.
- Author
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Qi, Xiaoyan, Liu, Ruijun, Cai, Ting, Huang, Zihan, Wang, Xiaolei, and Wang, Xia
- Subjects
- *
WASTEWATER treatment , *CHEMICAL oxygen demand , *STENOTROPHOMONAS maltophilia , *CHEMICAL energy , *NUCLEOTIDE sequencing - Abstract
Given the substantial chemical energy and harmful pollutants stored in refining wastewater (RW), energy recovery from RW has emerged as a promising strategy to address both energy scarcity and environmental degradation. In this study, we constructed a microbial fuel cell (MFC) facilitated by an electroactive microbial community to harness energy from RW. After the treatment of RW by MFC, high efficient removal rates of chemical oxygen demand (89.76%), NH 4 +-N (61.78%), total phosphorus (78.38%), chroma (81.53%), and turbidity (86.57%) were achieved. During the treatment of RW, the MFC system produced a maximum output voltage of 347 mV and a maximum power density of 337 mW m−2. High-throughput sequencing analysis revealed that the dominant phylum of domesticated microbial community was Proteobacteria (97.66%) and the dominant class was Gammaproteobacteria (70.10%). Furthermore, three dominant exoelectrogens (Paraburkholderia fungorum YS95, Pseudomonas sp. YS, and Stenotrophomonas maltophilia XS) capable of extracellular electron transfer were identified from the anodic samples. Notably, P. fungorum YS95 was identified as a novel exoelectrogen with significant naphthalene degradation capability. These results highlight the MFCs' efficiency in treating RW and recovering energy, with the discovery of exoelectrogens revealing the untapped potential for energy recovery from petroleum hydrocarbon pollutants. [Display omitted] • Refining wastewater treatment was achieved in MFC with 89.76% COD removal rate. • Energy recovery from refining wastewater was obtained with high power density. • Three dominant exoelectrogens were identified based on high-throughput sequencing. • A green alternative for energy recovery from refining wastewater was established. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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