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Related Experiment Videos

A general kinetic model for biological nutrient removal activated sludge systems: model development.

Zhi-rong Hu1, M C Wentzel, G A Ekama

  • 1Water Research Group, Department of Civil Engineering, University of Cape Town, Rondebosch 7701, Cape Town, South Africa. zhironghu@yahoo.com

Biotechnology and Bioengineering
|May 22, 2007
PubMed
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A new kinetic model for biological nutrient removal activated sludge systems, particularly external nitrification systems, is presented. It incorporates anoxic phosphorus uptake and denitrification by phosphorus accumulating organisms.

Area of Science:

  • Environmental Engineering
  • Microbial Ecology
  • Wastewater Treatment

Background:

  • Biological Nutrient Removal Activated Sludge (BNRAS) systems are crucial for wastewater treatment.
  • Existing models like UCTPHO provide a basis but may lack specific functionalities.
  • External nitrification (EN) in BNRAS presents unique challenges and opportunities for modeling.

Purpose of the Study:

  • To develop and present a novel kinetic model for BNRAS systems.
  • To specifically tailor the model for external nitrification BNRAS (ENBNRAS) systems.
  • To introduce modifications enhancing the model's predictive capabilities for nutrient removal.

Main Methods:

  • Building upon the established UCTPHO model framework.
  • Incorporating key modifications such as anoxic phosphorus uptake.

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  • Including denitrification processes mediated by phosphorus accumulating organisms (PAOs).

    • Main Results:

    • A comprehensive kinetic model for ENBNRAS is developed.
    • The model accounts for advanced biological processes like anoxic P uptake and denitrification.
    • Key features of the model are described and discussed.

    Conclusions:

    • The presented model offers an improved representation of ENBNRAS processes.
    • The inclusion of anoxic P uptake and PAO denitrification advances BNRAS modeling.
    • This model serves as a foundation for further research and application in wastewater treatment.