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A metabolic model of the biological phosphorus removal process: II. Validation during start‐up conditions
Author(s) -
Smolders G. J. F.,
Bulstra D. J.,
Jacobs R.,
van Loosdrecht M. C. M.,
Heijnen J. J.
Publication year - 1995
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260480310
Subject(s) - sequencing batch reactor , enhanced biological phosphorus removal , heterotroph , phosphorus , polyphosphate , anaerobic exercise , microorganism , steady state (chemistry) , population , chemistry , process (computing) , bioreactor , chromatography , phosphate , biology , biochemistry , wastewater , activated sludge , bacteria , environmental science , environmental engineering , physiology , computer science , demography , organic chemistry , sociology , genetics , operating system
A metabolic model of the biological phosphorus removal process has been developed and validated previously for complex conversions during the process under anaerobic and aerobic conditions at different growth rates in sequencing batch reactors in steady state. For additional validation of the metabolic model, the model was applied to the dynamic conditions which occur during the start‐up phase of the biological P removal in the presence and absence of non‐polyP heterotrophic microorganisms. In a laboratory scale sequencing batch reactor, experiments were performed to examine the enrichment of the population with polyphosphate organisms during the start‐up and the subsequent shift from non‐polyP, heterotrophic organisms to polyP organisms in the sludge. The effect of different influent loading patterns for acetate and phosphate was studied. In these experiments, the maximal growth rate of the polyP organisms and the behavior of the internal storage compounds could be derived. The metabolic model was capable of describing the experimental results, without the need to adjust the kinetic or stoichiometric parameters obtained under steady state conditions. © 1995 John Wiley & Sons, Inc.