Model of the anaerobic metabolism of the biological phosphorus removal process: Stoichiometry and pH influence

Biotechnology and Bioengineering - Tập 43 Số 6 - Trang 461-470 - 1994
G. Smolders1, Jan van der Meij1, Mark C.M. van Loosdrecht1, J. J. Heijnen1
1Department of Biochemical Engineering, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands

Tóm tắt

AbstractIn the anaerobic phase of a biological phosphorus removal process, acetate is taken up and converted to PHB utilizing both energy generated in the degradation of polyphosphate to phosphate, which is released, and energy generated in the conversion of glycogen to poly‐β‐hydroxy butyrate (PHB). The phosphate/acetate ratio cannot be considered a metabolic constant, because the energy requirement for the uptake of acetate is strongly influenced by the pH value. The observed phosphate/acetate ratio shows a variation of 0.25 to 0.75 P‐mol/C‐mol in a pH range of 5.5 to 8.5. It is shown that stored glycogen takes part in the metabolism to provide reduction equivalents and energy for the conversion of acetate to PHB. A structured metabolic model, based on glycogen as the source of the reduction equivalents in the anaerobic phase and the effect of the pH on the energy requirement of the uptake of acetate, is developed. The model explains the experimental results satisfactorily. © 1994 John Wiley & Sons, Inc.

Từ khóa


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Biotechnology and Bioengineering

Tập 43 Số 6

461-470

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