التفاصيل البيبلوغرافية
| العنوان: |
Mediating the performance of anaerobic granular sludge by exogenous flavin supplementation: Flavin binding capacity and behavior, interspecies electron transfer, and methane production. |
| المؤلفون: |
Zhuo, Meihui1 (AUTHOR), Quan, Xiangchun1 (AUTHOR) xchquan@bnu.edu.cn, Li, Naiyu1 (AUTHOR), Yin, Ruoyu1 (AUTHOR) |
| المصدر: |
Environmental Research. Feb2024, Vol. 242, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*CHARGE exchange, *FLAVIN adenine dinucleotide, *FLAVIN mononucleotide, *FLAVINS, *CYTOCHROME c |
| مستخلص: |
Although flavins are known as effective electron mediators, the binding capacity of exogenous flavins by anaerobic granular sludge (AGS) and their role in interspecies electron transfer (IET) remains unknown. In this study, AGS was mediated by using three exogenous flavins of riboflavin (RF), flavin mononucleotide (FMN), and flavin adenine dinucleotide (FAD). Results showed that the total amounts of flavins associated with extracellular polymeric substance (EPS) of AGS increased by 2.03–2.42 and 3.83–4.94 folds, after exposure to 50 and 200 μM of exogenous flavins, respectively. A large portion of FMN and FAD was transformed into RF by AGS. Exogenous flavin mediation also stimulated the production of EPS and cytochrome c (c -Cyts) as well as cytochrome-bound flavins. The increased abundance of these electron mediators led to a reduced electrochemical impedance of EPS and improved extracellular electron transfer capacity. The methane production of AGS after mediation with exogenous RF, FMN, and FAD increased by 19.03–31.71%, 22.86–26.04%, and 28.51–33.44%, respectively. This study sheds new light on the role of exogenous flavins in promoting the IET process of a complex microbial aggregate of AGS. [Display omitted] • The AGS was mediated with exogenous flavins of RF, FMN, and FAD. • The EPS of AGS showed a binding capacity to exogenous flavins. • Flavin mediation promoted the production of c -Cyts and cytochrome-bound flavins. • Flavin mediation enhanced the extracellular electron transfer capacity of EPS. • The methane production capacity was enhanced for AGS after mediation with flavins. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
