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HERO ID
1510879
Reference Type
Journal Article
Title
Prevalence of Nitrosomonas cluster 7 populations in the ammonia-oxidizing community of a submerged membrane bioreactor treating urban wastewater under different operation conditions
Author(s)
Cerrone, F; Poyatos, JM; Molina-Muñoz, M; Cortés-Lorenzo, C; González-López, J; Rodelas, B
Year
2013
Is Peer Reviewed?
Yes
Journal
Bioprocess and Biosystems Engineering
ISSN:
1615-7591
EISSN:
1615-7605
Volume
36
Issue
7
Page Numbers
901-910
Language
English
PMID
22976820
DOI
10.1007/s00449-012-0823-0
Abstract
A pilot-scale ultrafiltration membrane bioreactor (MBR) was used for the aerobic treatment of urban wastewater in four experimental stages influenced by seasonal temperature and different sets of operation conditions. The structure of the ammonia-oxidizing bacteria (AOB) community was profiled by temperature gradient gel electrophoresis (TGGE), based on the amplification and separation of partial ammonia-monoxygenase subunit A (amoA) genes. Canonical correspondence analysis revealed that temperature, hydraulic retention time and percentage of ammonia removal had a significant effect on the fingerprints of AOB communities. Phylogenetic analysis conducted on amoA/AmoA sequences of reamplified TGGE bands showed, however, that closely related ammonia-oxidizing populations inhabited the sludge of the MBR in all experimental stages. Nitrosomonas cluster 7 populations (N. europaea-N. eutropha cluster) prevailed under all conditions tested, even when the MBR was operated under complete biomass retention or at low temperatures, suggesting that the high ammonia concentrations in the system were determinant to select r-strategist AOB.
Tags
IRIS
•
Ammonia
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