NDLI: Acclimation of denitrifying activated sludge to a single vs. complex external carbon source during a start-up of sequencing batch reactors treating ammonium-rich anaerobic sludge digester liquors

Content Provider	Springer Nature Link
Author	Czerwionka, Krzysztof Luczkiewicz, Aneta Majtacz, Joanna Kowal, Przemyslaw Jankowska, Katarzyna Ciesielski, Slawomir Pagilla, Krishna Makinia, Jacek
Copyright Year	2014
Abstract	In this study, denitrification of ammonium-reach anaerobic sludge digester liquor was investigated during start-up periods of two laboratory-scale “fill-and-draw” reactors. One reactor was fed with a single carbon source (ethanol), whereas the other reactor was fed with a complex carbon source (fusel oil). During two acclimation experiments, the structure of microbial community involved in denitrification was analyzed using 16S rDNA polymerase chain reaction-denaturing gradient gel electrophoresis fingerprints and fluorescent in situ hybridization. The characteristics of the mixed liquor were additionally supported by regular measurements of nitrate uptake rates. The addition of fusel oil and ethanol resulted in a significant enhancement of the denitrification rate and efficiency combined with the increasing volumetric addition of sludge digester liquor up to 15 % of the reactor volume. The microbiological analyses revealed that the addition of sludge digester liquor as well as both external carbon sources (fusel oil and ethanol) did not affect the structure of microbial communities in a severe way. In both reactors, Curvibacter sp. and Azoarcus sp. were found as the most abundant representatives of denitrifiers.
Starting Page	881
Ending Page	892
Page Count	12
File Format	PDF
ISSN	09239820
Journal	Biodegradation
Volume Number	25
Issue Number	6
e-ISSN	15729729
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-08-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Denitrification Ethanol External carbon Fusel oil Microbial structure Sidestream treatment Microbiology Soil Science & Conservation Geochemistry Terrestrial Pollution Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Waste Management/Waste Technology
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology

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