The spatial significance of water quality indicators in waste stabilization ponds--limitations of residence time distribution analysis in predicting treatment efficiency.

摘要: Over the past fifty years, considerable research in waste stabilization pond operation has led to development of a number models used describe hydraulic regime and predict treatment efficiency. Models range complexity from plug or completely mixed simplifications computational fluid dynamics (CFD) which are able flow hydraulics at local level. Information about exit age effluent can be estimate pollutant decay. However, mechanistic approach understanding highlights importance knowing both time spatial history effluent. A CFD model large system was constructed demonstrate various scenarios under different boundary conditions. Two were compared visually effects differing Typical applied each condition quantify biological differences. This simple example indicates that integrating localised will lead more holistic