Net P-removal deterioration in enriched PAO sludge subjected to permanent aerobic conditions

Pijuan, Maite, Guisasola, Albert, Baeza, Juan Antonio, Carrera, Julián, Casas, Carles and Lafuente, Javier (2006) Net P-removal deterioration in enriched PAO sludge subjected to permanent aerobic conditions. Journal of Biotechnology, 123 1: 117-126. doi:10.1016/j.jbiotec.2005.10.018

Author Pijuan, Maite
Guisasola, Albert
Baeza, Juan Antonio
Carrera, Julián
Casas, Carles
Lafuente, Javier
Title Net P-removal deterioration in enriched PAO sludge subjected to permanent aerobic conditions
Journal name Journal of Biotechnology   Check publisher's open access policy
ISSN 0168-1656
Publication date 2006-05-03
Year available 2006
Sub-type Article (original research)
DOI 10.1016/j.jbiotec.2005.10.018
Volume 123
Issue 1
Start page 117
End page 126
Total pages 10
Editor A. Pühler
Place of publication Amsterdam
Publisher Elsevier Science.
Language eng
Subject 090409 Wastewater Treatment Processes
Abstract Recently, some research in the field of enhanced biological phosphorus removal (EBPR) has been focused on studying systems where the electron donor (substrate) and the electron acceptor (nitrate or oxygen) are present simultaneously. This can occur, for example, in a full scale wastewater treatment plant during heavy rainfall periods when the anaerobic hydraulic retention time is temporarily shortened. To study this situation that could induce EBPR failure, the operation of a sequencing batch reactor (SBR) working under alternating anaerobic–aerobic conditions with an enriched EBPR population (50% Candidatus Accumulibacter phosphatis and less than 1% Candidatus Competibacter phosphatis) was shifted to strict aerobic operation. Seven cycle studies were performed during the 11 days of aerobic operation. Net P-removal was observed in this aerobic SBR during the first 4 days of operation but the system could not achieve net-P removal after this period, although the microbial composition, in terms of percentage of Accumulibacter and Competibacter, did not change significantly. The observed changes in the different compounds analysed (phosphorus, acetate, glycogen and PHB) as well as in the OUR profile indicate that metabolic changes are produced for the adaptation of PAO to aerobic conditions.
Keyword Enhanced biological phosphorus removal (EBPR)
Phosphorus accumulating organisms (PAO)
Fluorescence in situ hybridisation (FISH)
Oxygen uptake rate (OUR)
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Advanced Water Management Centre Publications
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Created: Mon, 19 Jan 2009, 13:06:13 EST by Ms Karen Naughton on behalf of Advanced Water Management Centre