Minimal aerobic sludge retention time in biological phosphorus removal systems

The methodology for determination of the minimally required aerobic sludge retention time (SRTminaer) in biological phosphorus removal (BPR) systems is presented in this article. Contrary to normal biological conversions, the BPR process is not limited by a SRTmin resulting from the maximum growth r...

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Bibliographic Details
Published in:Biotechnology and bioengineering 1998-11, Vol.60 (3), p.326-332
Main Authors: Brdjanovic, Damir, van Loosdrecht, Mark C. M., Hooijmans, Christine M., Alaerts, Guy J., Heijnen, Joseph J.
Format: Article
Language:English
Subjects:
Activated sludge process
aerobic
Bioconversion
Biological and medical sciences
biological phosphorus removal
Biological treatment of waters
Bioreactors
Biotechnology
Cells
Environment and pollution
Fundamental and applied biological sciences. Psychology
General aspects
Industrial applications and implications. Economical aspects
Mathematics in biology. Statistical analysis. Models. Metrology. Data processing in biology (general aspects)
Phosphorus
poly-hydroxy-alkanoate
Reaction kinetics
sludge retention time
temperature
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Summary:The methodology for determination of the minimally required aerobic sludge retention time (SRTminaer) in biological phosphorus removal (BPR) systems is presented in this article. Contrary to normal biological conversions, the BPR process is not limited by a SRTmin resulting from the maximum growth rate of the organisms. This is because the aerobic SRT should be long enough to oxidize the amount of poly‐hydroxy‐alkanoates (PHA) stored in the anaerobic phase. This means that the SRTminaer will primarily depend on the PHA conversion kinetics and the maximal achievable PHA content in the cell (storage capacity). The model for the prediction of the minimally required aerobic SRT as a function of kinetic and process parameters was developed and compared with experimental data used to evaluate several operational aspects of BPR in a sequencing batch reactor (SBR) system. The model was proved as capable of describing them satisfactorily.© 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 60: 326–332, 1998.
ISSN:0006-3592
1097-0290
DOI:10.1002/(SICI)1097-0290(19981105)60:3<326::AID-BIT8>3.0.CO;2-J