NDLI: Effects of Redox Mediators on Anaerobic Degradation of Phenol by Shewanella sp. XB

Content Provider	Springer Nature Link
Author	Wang, Jing Zhou, Yang Li, Peiliang Lu, Hong Jin, Ruofei Liu, Guangfei
Copyright Year	2015
Abstract	Up to now, no information is available on the role of redox mediators in anaerobic degradation of phenol without exogenous electron acceptors. The effects of mediators on anaerobic biodegradation of phenol by Shewanella sp. XB were investigated for the first time in this study. The results showed that the removal efficiencies of phenol were enhanced by 2.87-, 3.31-, and 2.89-fold under fermentation conditions in the presence of 0.20 mM anthraquinone-2-sulfonate (AQS), 0.05 mM anthraquinone-2,6-disulfonate (AQDS), and 0.05 mM riboflavin, respectively, in 3-day incubation. Further analysis found that phenol was fermented via volatile fatty acids (VFAs) as intermediates, particularly acetate, and further converted to CH$_{4}$. Under denitrification conditions, phenol removal efficiencies were enhanced by 3.92-, 4.58-, and 3.57-fold when AQS, AQDS, and riboflavin, respectively, were added into reaction systems. During this process, phenol was preferentially degraded to CO$_{2}$ and H$_{2}$O rather than CH$_{4}$. These results indicate that the three mediators not only increased significantly phenol biodegradation rates under fermentation conditions, but also considerably accelerated nitrate bioreduction-coupled phenol degradation. These findings are beneficial to develop efficient strategies of phenol biodegradation and to better understand phenol fate in natural environments.
Starting Page	3162
Ending Page	3172
Page Count	11
File Format	PDF
ISSN	02732289
Journal	Applied Biochemistry and Biotechnology
Volume Number	175
Issue Number	6
e-ISSN	15590291
Language	English
Publisher	Springer US
Publisher Date	2015-01-22
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Redox mediators Phenol Fermentation Denitrification Shewanella Biotechnology Biochemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Environmental Engineering Biochemistry Bioengineering Applied Microbiology and Biotechnology Biotechnology

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