Back
Modelling of aeration systems at wastewater treatment plants.
Journal article

Modelling of aeration systems at wastewater treatment plants.

  • Rieger L EAWAG, Swiss Federal Institute for Environmental Science and Technology Ueberlandstr. 133, PO Box 611, CH-8600 Duebendorf, Switzerland. leiv.rieger@modeleau.ca
  • Alex J
  • Gujer W
  • Siegrist H
  • 2006-05-26
Published in:
  • Water science and technology : a journal of the International Association on Water Pollution Research. - 2006
Air Movements
Calibration
Models, Theoretical
Oxygen
Reproducibility of Results
Waste Disposal, Fluid
English A model for the response time of aeration systems at WWTPs is proposed. It includes the delays caused by the air supply system (consisting of blowers, throttles and pipes), the rise time of the air bubbles and all control loops except the master DO controller. Beside a description of the required step-change experiments, different approaches for model calibration are given depending on the available data. Moreover, the parameters for the oxygen transfer and the response time of the aeration system model are not clearly identifiable. The model can be used for simulation studies which compare different types of controllers under changing loading and process conditions. The results from full-scale experiments at three different plants show that the response times of the aeration systems are in the range of 4-5 min. Taking all processes and time constants into account, some 30 min are needed to reach a new steady state after a step change of the airflow rate.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/93215
Statistics
Document views: 32 File downloads: