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Modelling seasonal dynamics of "Microthrix parvicella".
Journal article

Modelling seasonal dynamics of "Microthrix parvicella".

  • Hug T Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, PO Box 611, CH-8600 Duebendorf, Switzerland. thomas.hug@eawag.ch
  • Gujer W
  • Siegrist H
  • 2006-08-11
Published in:
  • Water science and technology : a journal of the International Association on Water Pollution Research. - 2006
Actinobacteria
Calibration
In Situ Hybridization, Fluorescence
Industrial Waste
Kinetics
Models, Theoretical
Seasons
English The filamentous bacteria "Microthrix parvicella" can cause serious bulking and scumming in wastewater treatment plants (WWTPs) all over the world. Decades of research have identified Microthrix as a specialized lipid consumer but could not clarify the processes that allow this organism to successfully compete in activated sludge systems. In this study we developed a model, based on ASM3, that describes the pronounced seasonal variations of Microthrix abundance observed in a full-scale WWTP. We hypothesize that low temperatures reduce the solubility of lipids and inhibit their uptake by non-specialized bacteria. The presented model structure and parameters successfully fit the measured data; however they do not necessarily reflect the only and true selection mechanism for Microthrix. This model is not yet to be used for prediction; it is rather a valuable research tool to coordinate the discussion and plan future research activities in order to identify the relevant selection mechanisms favoring Microthrix in activated sludge systems.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/93150
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