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Biological nitrogen removal from wastewater

U Wiesmann1

  • 1Institut für Verfahrenstechnik, Technische Universität Berlin, FRG.

Advances in Biochemical Engineering/Biotechnology
|January 1, 1994
PubMed
Summary

This review highlights reaction engineering models for understanding nitrification and denitrification kinetics. Advances in pilot-scale studies show increased efficiency and stability, paving the way for full-scale industrial nitrogen removal.

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Area of Science:

  • Environmental microbiology
  • Chemical engineering
  • Water treatment technologies

Background:

  • Nitrification and denitrification are key processes for nitrogen removal in wastewater treatment.
  • Understanding the kinetics of these processes is crucial for optimizing treatment efficiency.
  • Reaction engineering models offer a framework for analyzing and predicting microbial process behavior.

Purpose of the Study:

  • To review research on nitrification and denitrification kinetics.
  • To explain the application of reaction engineering models in these processes.
  • To assess the advancements in nitrification efficiency and stability through pilot-scale investigations.

Main Methods:

  • Literature review of nitrification and denitrification kinetics.
  • Explanation of reaction engineering models.
  • Analysis of laboratory-scale experiments focusing on oxygen and substrate limitation, and inhibition in high-rate nitrification.
  • Evaluation of pilot-scale investigation results from the past 15 years.

Main Results:

  • Reaction engineering models provide valuable insights into nitrification and denitrification processes.
  • Laboratory experiments demonstrate the impact of oxygen, substrate limitation, and inhibition on nitrification kinetics.
  • Pilot-scale studies show significant improvements in nitrification efficiency and process stabilization over the last 15 years.

Conclusions:

  • Reaction engineering models are essential tools for understanding and designing nitrification/denitrification reactors.
  • Pilot-scale advancements indicate readiness for full-scale implementation of nitrogen removal from industrial effluents.
  • Optimized nitrogen removal is achievable through advanced kinetic modeling and process engineering.

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