Modelling and calibration of phosphate and glycogen accumulating organism competition for acetate uptake in a sequencing batch reactor

Yagci N., Insel G., Artan N., ORHON D.

WATER SCIENCE AND TECHNOLOGY, vol.50, no.6, pp.241-250, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 6
  • Publication Date: 2004
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.241-250
  • Keywords: activated sludge, enhanced biological phosphate removal, glycogen accumulating organism, phosphate accumulating organism, polyhydroxyalkonates, sequencing batch reactor, BIOLOGICAL PHOSPHORUS REMOVAL, MICROORGANISMS, POLYPHOSPHATE, ASM2D
  • Istanbul Technical University Affiliated: Yes


This paper improves the modeling of enhanced biological phosphate removal, by introducing the mechanistic description of a mixed culture of glycogen and phosphate accumulating organisms competing for acetate, and glycogen metabolism of the latter. A new process stoichiometry is defined for the mixed culture based upon previously developed metabolic concepts and models. The proposed model is tested with and used for the calibration of experimental data generated by a sequencing batch reactor operated with acetate feeding at a P/Ac ratio of 0.05 mgP mg(-1) COD. The calibration yielded acceptable numerical results for all the model coefficients tested and supported the validity of selected metabolic relationships for process stoichiometry. It also defined conditions that allow the system to sustain glycogen accumulating organisms with significant impact on process behaviour and performance.