Biological-Hydraulic Coupled Model of Activated Sludge Wastewater Treatment Plants and Model Validation

摘要

A fully coupled activated sludge model (FCASM2) is proposed, based on FCASM1 and combined with Delft metabolic model for biological phosphorus removal. In order to study the hydraulic effect on biological removal, a biological- hydraulic coupled model (FCASM2-Hydro) described by 1-D advection-dispersion equation is also presented. Simulation results for wastewater treatment plants (WWTP) indicate that the numerical simulation values of the coupled model (FCASM2-Hydro) are more consistent with real values than FCASM2's. Long-term dynamic simulation results for biological phosphorus removal over 30 days show that the trends of FCASM1 and FCASM2 are identical with the measured trend, and the numerical simulation values of FCASM2 are closer to the real values than FCASM1's. For a 3-day short-term dynamic simulations, the results of biological phosphorus removal show that the trends of FCASM1 and FCASM2 are also identical with the measured trend.