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Modeling of sequencing batch reactors treating inhibitory and noninhibitory wastewaters

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A mathematical model for sequencing batch reactors (SBR) that takes into account fill and react periods was developed and tested against experimental data from the literature. The Monod equation was used to describe microbial growth kinetics. The proposed model predicts the time dependent microbial cell and substrate concentrations during SBR treatment of wastes. A numerical method was used to solve the governing model equations which comprised nonlinear unsteady-state ordinary differential equations. Model simulations highlighted the importance of feed rate as a major operating parameter. For biodegradable wastes and low strength inhibitory wastes, an instantaneous fill is optimum whereas high strength inhibitory waste treatment is only possible with long fill times. The model predictions compared well with experimental results reported in the literature. This model is useful for further understanding of biological wastewater treatment kinetics by batch processes and may serve as a valuable design aid for practicing engineers.
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Keywords: INHIBITION; KINETICS; MODEL; SEQUENCING BATCH REACTORS; SUSPENDED GROWTH

Document Type: Research Article

Publication date: 1997-01-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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