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Characterization of denitrifying granular sludge with and without the addition of external carbon source
Year:
2012
Source of publication :
Bioresource Technology
Authors :
Lew, Beni
;
.
Volume :
124
Co-Authors:

Peter Stief, Michael Beliavski, Aviad Ashkenazi, Olivera Svitlica, Abid Khan, Sheldon Tarre, Dirk de Beer, Michal Green

Facilitators :
From page:
413
To page:
420
(
Total pages:
8
)
Abstract:

In this study granular sludge taken from a denitrifying upflow sludge reactor was characterized. Denitrification rates were determined in batch tests with and without external carbon source addition and pH microprofiles of the granules were studied. The microbial community structure was also determined. The results showed that denitrification without carbon source addition occurs; however, the process rate was lower than with external carbon source. This suggests that bacteria use dead biomass and extracellular material in the granular sludge as a carbon source when readily available substrate has been exhausted and nitrate is still present. Microprofiles showed a slight pH decrease for denitrification without external carbon source addition, and an increase in pH when using nitrite as the electron acceptor. Microprofiles using acetate as the carbon source for denitrification showed a significant increase in pH. Clone sequences obtained were close to the species Vitellibacter sp., Denitromonas indolicum str. and Denitromonas aromaticaus sp.

Note:
Related Files :
Acetate concentration
DENITRIFICATION
Granular sludge
Microsensor profile
USB reactor
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More details
DOI :
https://doi.org/10.1016/j.biortech.2012.08.049
Article number:
0
Affiliations:
Database:
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
55868
Last updated date:
02/03/2022 17:27
Creation date:
05/08/2021 13:17
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Scientific Publication
Characterization of denitrifying granular sludge with and without the addition of external carbon source
124

Peter Stief, Michael Beliavski, Aviad Ashkenazi, Olivera Svitlica, Abid Khan, Sheldon Tarre, Dirk de Beer, Michal Green

Characterization of denitrifying granular sludge with and without the addition of external carbon source

In this study granular sludge taken from a denitrifying upflow sludge reactor was characterized. Denitrification rates were determined in batch tests with and without external carbon source addition and pH microprofiles of the granules were studied. The microbial community structure was also determined. The results showed that denitrification without carbon source addition occurs; however, the process rate was lower than with external carbon source. This suggests that bacteria use dead biomass and extracellular material in the granular sludge as a carbon source when readily available substrate has been exhausted and nitrate is still present. Microprofiles showed a slight pH decrease for denitrification without external carbon source addition, and an increase in pH when using nitrite as the electron acceptor. Microprofiles using acetate as the carbon source for denitrification showed a significant increase in pH. Clone sequences obtained were close to the species Vitellibacter sp., Denitromonas indolicum str. and Denitromonas aromaticaus sp.

Scientific Publication
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