Stoichiometric model of the aerobic metabolism of the biological phosphorus removal process

Authors

  • G. J. F. Smolders,

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    1. Department of Biochemical Engineering, Delft University of technology Julianalaan 67, 2628 BC Delft, The Netherlands
    • Department of Biochemical Engineering, Delft University of technology Julianalaan 67, 2628 BC Delft, The Netherlands
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  • J. van der Meij,

    1. Department of Biochemical Engineering, Delft University of technology Julianalaan 67, 2628 BC Delft, The Netherlands
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  • M. C. M. van Loosdrecht,

    1. Department of Biochemical Engineering, Delft University of technology Julianalaan 67, 2628 BC Delft, The Netherlands
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  • J. J. Heijnen

    1. Department of Biochemical Engineering, Delft University of technology Julianalaan 67, 2628 BC Delft, The Netherlands
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Abstract

In the aerobic phase of the biological phosphorus removal process, poly-β-hydroxybutyrate, produced during anaerobic conditions, is used for cell growth, phosphate uptake, and glycogen formation. A metabolic model of this process has been developed. The yields for growth, polyphosphate and glycogen formation are quantified using the coupling of all these conversions to the oxygen consumption. The uptake of phosphate and storage as polyphosphate is shown to have a direct effect on the observed oxygen consumption in the aerobic phase. The overall energy requirements for the P-metabolism are substantial: 25% of the acetate consumed during anaerobic conditions and 60% of the oxygen consumptions is used for the synthesis of polyphosphate and glycogen. © 1994 John Wiley & Sons, Inc.

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