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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
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 ingerprints 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.
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Authors (8)
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Przemysław Kowal
- Uniwersytet Warmińsko Mazurski w Olsztynie Biotechnologii w Ochronie Środowiska
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Sławomir Ciesielski
- Uniwersytet Warmińsko Mazurski w Olsztynie Biotechnologii w Ochronie Środowiska
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Krishna Pagilla
- Illinois Institute of Technology Department of Civil, Architectural and Environmenta l Engineering
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
BIODEGRADATION
no. 25,
pages 881 - 892,
ISSN: 0923-9820 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Czerwionka K., Łuczkiewicz A., Majtacz J., Kowal P., Jankowska K., Ciesielski S., Pagilla K., Mąkinia J.: 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// BIODEGRADATION. -Vol. 25, nr. 6 (2014), s.881-892
- DOI:
- Digital Object Identifier (open in new tab) 10.1007/s10532-014-9707-0
- Verified by:
- Gdańsk University of Technology
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