Minimal aerobic sludge retention time in biological phosphorus removal systems
✍ Scribed by Damir Brdjanovic; Mark C. M. van Loosdrecht; Christine M. Hooijmans; Guy J. Alaerts; Joseph J. Heijnen
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 179 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0006-3592
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✦ Synopsis
The methodology for determination of the minimally required aerobic sludge retention time (SRT min aer) in biological phosphorus removal (BPR) systems is presented in this article. Contrary to normal biological conversions, the BPR process is not limited by a SRT min 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 SRT min aer 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.