Aerobic phosphorus release linked to acetate uptake: influence of PAO intracellular storage compounds

Pijuan, M., Guisasola, A., Baeza, J.A., Carrera, J., Casas, C. and Lafuente, J. (2005) Aerobic phosphorus release linked to acetate uptake: influence of PAO intracellular storage compounds. Biochemical Engineering Journal, 26 2-3: 184-190. doi:10.1016/j.bej.2005.04.014

Author Pijuan, M.
Guisasola, A.
Baeza, J.A.
Carrera, J.
Casas, C.
Lafuente, J.
Title Aerobic phosphorus release linked to acetate uptake: influence of PAO intracellular storage compounds
Journal name Biochemical Engineering Journal   Check publisher's open access policy
ISSN 1369-703X
Publication date 2005-11-15
Year available 2005
Sub-type Article (original research)
DOI 10.1016/j.bej.2005.04.014
Volume 26
Issue 2-3
Start page 184
End page 190
Total pages 7
Editor C. Webb
W. M. Miller
M. Taya
Place of publication United States
Publisher Elsevier
Language eng
Subject 090409 Wastewater Treatment Processes
Abstract The mechanisms of polyphosphate accumulating organisms (PAO) are not fully established yet under conditions that differ from the classical anaerobic/aerobic conditions. Recently, some research in the field of biological phosphorus removal has been focused on studying systems where the electron donor (substrate) and the electron acceptor (nitrate or oxygen) are present simultaneously. The aim of this study was to assess the influence of the levels of intracellular storage compounds in the net phosphorus removal process occurring under continuous aerobic conditions. An enhanced biological phosphorus removal (EBPR) system was enriched in a sequencing batch reactor working under alternating anaerobic/aerobic conditions and the percentage of “Candidatus Accumulibacter phosphatis” (the PAO in this study) was 45%. Three different batch experiments were performed to obtain a better insight of this process: one under standard anaerobic–aerobic conditions and two experiments under strictly aerobic conditions. One of the aerobic experiments was developed with the EBPR biomass withdrawn at the end of the anaerobic period and the other one with biomass withdrawn at the end of the aerobic period of the standard process. Although net phosphorus removal was achieved in both aerobic experiments, the ratios of phosphorus released and glycogen degraded versus acetate taken up were higher when the sludge was withdrawn at the end of the aerobic period, where higher levels of polyphosphate and glycogen were present in the biomass.
Keyword Enhanced biological phosphorus removal
Polyphosphate accumulating organisms
Oxygen uptake rate
Wastewater treatment
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, 12:37:14 EST by Ms Karen Naughton on behalf of Advanced Water Management Centre