New insights into N2O emission and electron competition under different chemical oxygen demand to nitrogen ratios in a biofilm system.
Sci Total Environ
; 949: 175265, 2024 Nov 01.
Article
en En
| MEDLINE
| ID: mdl-39102953
ABSTRACT
Nitrous oxide (N2O) is a greenhouse gas that could accumulate during the heterotrophic denitrification process. In this study, the effects of different chemical oxygen demand to nitrogen ratio (COD/N) on N2O production and electron competition was investigated. The electron competition was intensified with the decrease of electron supply, and Nos had the best electron competition ability. The model simulation results indicated that the degradation of NOx-Ns was a combination of diffusion and biological degradation. As reaction proceeding, N2O could accumulate inside biofilm. A thinner biofilm and a longer hydraulic retention time (HRT) might be an effective way to control N2O emission. The application of mathematical model is an opportunity to gain deep understanding of substrate degradation and electron competition inside biofilm.
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Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Biopelículas
/
Análisis de la Demanda Biológica de Oxígeno
/
Nitrógeno
/
Óxido Nitroso
Idioma:
En
Revista:
Sci Total Environ
Año:
2024
Tipo del documento:
Article
País de afiliación:
China