Abstract
The capacity of an anaerobic granular sludge for serving as an immobilizing mechanism for quinone-respiring bacteria was evaluated. The inoculum was continuously fed with a basal medium containing the humic model compound, anthraquinone-2,6-disulfonate (AQDS), as a terminal electron acceptor. Complete reduction of AQDS was achieved by the granular sludge for a prolonged period in an anaerobic bioreactor provided with a mixture of volatile fatty acids as a substrate. Phylogenetic analysis revealed the enrichment and immobilization of AQDS-respiring bacteria appearing as dominant organisms in the microbial population of the AQDS-supplemented reactor, compared to a reactor control operated under methanogenic conditions. The consistent quinone-reducing capacity observed in the consortium indicates that it is feasible to apply quinone-reducing microorganisms in continuous bioreactors and this ability can potentially be important in wastewaters rich in humic substances. The quinone reducing activity could also be applied to accelerate the conversion of xenobiotics susceptible to reductive biotransformations such as azo dyes and polychlorinated compounds in continuous bioreactors.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 9-16 |
| Number of pages | 8 |
| Journal | Water Science and Technology |
| Volume | 48 |
| Issue number | 6 |
| State | Published - 2003 |
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Keywords
- AQDS
- Immobilization
- Quinones
- UASB
- Xenobiotics
ASJC Scopus subject areas
- Water Science and Technology
Cite this
Enrichment and immobilization of quinone-respiring bacteria in anaerobic granular sludge. / Cervantes, F. J.; Duong-Dac, T.; Roest, K.; Akkermans, A. D L; Lettinga, G.; Field, James A.
In: Water Science and Technology, Vol. 48, No. 6, 2003, p. 9-16.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enrichment and immobilization of quinone-respiring bacteria in anaerobic granular sludge
AU - Cervantes, F. J.
AU - Duong-Dac, T.
AU - Roest, K.
AU - Akkermans, A. D L
AU - Lettinga, G.
AU - Field, James A
PY - 2003
Y1 - 2003
N2 - The capacity of an anaerobic granular sludge for serving as an immobilizing mechanism for quinone-respiring bacteria was evaluated. The inoculum was continuously fed with a basal medium containing the humic model compound, anthraquinone-2,6-disulfonate (AQDS), as a terminal electron acceptor. Complete reduction of AQDS was achieved by the granular sludge for a prolonged period in an anaerobic bioreactor provided with a mixture of volatile fatty acids as a substrate. Phylogenetic analysis revealed the enrichment and immobilization of AQDS-respiring bacteria appearing as dominant organisms in the microbial population of the AQDS-supplemented reactor, compared to a reactor control operated under methanogenic conditions. The consistent quinone-reducing capacity observed in the consortium indicates that it is feasible to apply quinone-reducing microorganisms in continuous bioreactors and this ability can potentially be important in wastewaters rich in humic substances. The quinone reducing activity could also be applied to accelerate the conversion of xenobiotics susceptible to reductive biotransformations such as azo dyes and polychlorinated compounds in continuous bioreactors.
AB - The capacity of an anaerobic granular sludge for serving as an immobilizing mechanism for quinone-respiring bacteria was evaluated. The inoculum was continuously fed with a basal medium containing the humic model compound, anthraquinone-2,6-disulfonate (AQDS), as a terminal electron acceptor. Complete reduction of AQDS was achieved by the granular sludge for a prolonged period in an anaerobic bioreactor provided with a mixture of volatile fatty acids as a substrate. Phylogenetic analysis revealed the enrichment and immobilization of AQDS-respiring bacteria appearing as dominant organisms in the microbial population of the AQDS-supplemented reactor, compared to a reactor control operated under methanogenic conditions. The consistent quinone-reducing capacity observed in the consortium indicates that it is feasible to apply quinone-reducing microorganisms in continuous bioreactors and this ability can potentially be important in wastewaters rich in humic substances. The quinone reducing activity could also be applied to accelerate the conversion of xenobiotics susceptible to reductive biotransformations such as azo dyes and polychlorinated compounds in continuous bioreactors.
KW - AQDS
KW - Immobilization
KW - Quinones
KW - UASB
KW - Xenobiotics
UR - http://www.scopus.com/inward/record.url?scp=0242636314&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0242636314&partnerID=8YFLogxK
M3 - Article
VL - 48
SP - 9
EP - 16
JO - Water Science and Technology
JF - Water Science and Technology
SN - 0273-1223
IS - 6
ER -