Effect of COD/ NO(3)(−)-N ratio on nitrite accumulation and microbial behavior in glucose-driven partial denitrification system

COD/NO(3)(−)-N ratio was considered to be one of the key factors achieving effective nitrite accumulation during partial denitrification. In two parallel reactors incubated with glucose as carbon source at COD/NO(3)(−)-N of 3 and 5, respectively, the microbial community structure shift and the nitri...

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Detalles Bibliográficos
Autores principales: Zeng, Zhijie, Wang, Yiying, Zhu, Wenxuan, Xie, Tian, Li, Lingling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10130780/
https://www.ncbi.nlm.nih.gov/pubmed/37123922
http://dx.doi.org/10.1016/j.heliyon.2023.e14920
Descripción
Sumario:COD/NO(3)(−)-N ratio was considered to be one of the key factors achieving effective nitrite accumulation during partial denitrification. In two parallel reactors incubated with glucose as carbon source at COD/NO(3)(−)-N of 3 and 5, respectively, the microbial community structure shift and the nitrite accumulation performance during long-term operation were investigated. The maximum nitrite accumulation ratios at COD/NO(3)(−)-N of 3 and 5 were 17.9% and 47.04%, respectively. Thauera was the dominant genus in both reactors on day 220 with the relative abundance of 18.67% and 64.01%, respectively. Batch experiments with different electron acceptors suggested that the distinction in nitrite accumulation at COD/NO(3)(−)-N of 3 and 5 might be caused by the differences in the abundance of Thauera.

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