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Article
Modeling Bacterial Competition in Activated Sludge Using Non-linear Dynamics and Monod Kinetics
Proceedings of the IASTED International Conference on Modelling and Simulation (2003, Palm Springs, CA)
  • Pascal E. Saikaly
  • Daniel B. Oerther, Missouri University of Science and Technology
Abstract

A mechanistic model for activated sludge sewage treatment was developed to predict exploitative competition of six aerobic heterotrophic bacterial species competing for three complementary growth limiting substrates using the noninteractive Monod equation. The central hypothesis of the model is that in a multispecies/substrate system the number of coexisting bacterial species, N, exceeds the number of limiting resources, K, available for them. The model was used to investigate the effect of bioreactor conditions on the diversity of bacterial species. Preliminary results of model simulations showed that for a certain range of solids retention times (2.28-5.66 days) the competition of six bacterial species for three growth limiting substrates produces oscillations within the structure of the bacterial community allowing for the sustained growth of more than three species on the three substrates.

Meeting Name
IASTED International Conference on Modelling and Simulation (2003: Feb. 24-26; Palm Springs, CA)
Department(s)
Civil, Architectural and Environmental Engineering
Sponsor(s)
AISTED. Technical Committee on Modelling and Simulation; WMSF
Keywords and Phrases
  • Acetic acid,
  • Bacteria,
  • Bioreactors,
  • Ecosystems,
  • Mathematical models,
  • Oscillations,
  • Sewage sludge,
  • Sewage treatment,
  • Urea,
  • Competitive exclusion principle,
  • Monod kinetics,
  • Resource-ration theory,
  • Sewage bacteriology,
  • Microorganisms
International Standard Book Number (ISBN)
0889863377
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2003 International Association of Science and Technology for Development (IASTED), All rights reserved.
Publication Date
2-1-2003
Citation Information
Pascal E. Saikaly and Daniel B. Oerther. "Modeling Bacterial Competition in Activated Sludge Using Non-linear Dynamics and Monod Kinetics" Proceedings of the IASTED International Conference on Modelling and Simulation (2003, Palm Springs, CA) (2003) p. 203 - 208
Available at: http://works.bepress.com/daniel_oerther/66/