The project was sponsored by the Department of Wastewater Treatment, Unified Sewerage Agency of Washington County, Hillsboro OR (USA).
Proceedings of the 8th International Association on Water Quality Conference on Design, Operation, and Economics of Large Wastewater Treatment Plants
Sewage -- Purification -- Activated sludge process, Activated sludge process -- Computer simulation, Water -- Dissolved oxygen, Mass transfer
The aim of this research was to show the impact of the flow conditions and variations in the aeration intensity on changes in the predicted dissolved oxygen (DO) concentrations in a full-scale activated sludge reactor. The Activated Sludge Model No. 1 was used to describe the biochemical processes. The studies were performed at the Rock Creek wastewater treatment plant in Hillsboro, OR (USA). The simulation results were compared with data originating from two 24-hour experiments. The model that best reflected the spatial and diurnal distributions of the DO concentrations was the one-dimensional advection-dispersion equation with a variable overall oxygen mass transfer coefficient in the source term for dissolved oxygen.
Makinia, Jacek and Wells, Scott A., "Improvements in Modeling Dissolved Oxygen in Activated Sludge Systems" (1999). Civil and Environmental Engineering Faculty Publications and Presentations. 121.