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UBC Theses and Dissertations

Modelling carbon oxidation in pulp mill activated sludge systems : determining model parameters Stanyer, Deborah Jane


To predict the behavior of municipal wastewater treatment facilities, the Activated Sludge Model No. 1 is often used. This model has also served as the basis for the development of many other models to determine the behavior of activated sludge systems treating municipal wastewater, and has also been extended to the development of a model for petrochemical activated sludge treatment systems. Application of the model requires the determination of kinetic parameters and wastewater composition using continuous culture laboratory scale activated sludge reactors. These systems are laborious to operate and are equipment intensive. Activated sludge systems are a commonly used method of secondary treatment of pulp mill effluents in British Columbia. The application of the Activated Sludge Model No. 1 has not been extended previously to predict the performance of carbon oxidation in activated sludge systems treating pulp mill effluent. The objective of this study was to establish a database of experimental information on the characteristics of activated sludge systems treating bleached Kraft pulp mill wastewater using simple on-site batch test methods. Batch test methods involving respirometry and chemical oxygen demand measurements were successful in generating a data set of wastewater and biomass characteristics comparable to those found in the literature. Development of a dynamic mechanistic model based on the data generated in this study will provide a framework for studying the behavior of pulp mill activated sludge systems and provide a basis for planning further experimentation.

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