DYNAMIC SIMULATION OF A NDBEPR ACTIVATED-SLUDGE PROCESS

The paper presents a dynamic model for a NDBEPR (Nitrification Denitri fication Biological Excess Phosphorus Removal system) that achieves co mbined biological removal of nitrogen and phosphorus. The model includ es the biological reactors and the secondary settler. A computer simul ation programme was developed in order to test the model that was veri fied with reference to an existing urban wastewater treatment plant wi th a three-stage configuration (anaerobic, anoxic, aerobic reactors). The comparison between the simulation results and the actual plant rec orded outputs shows that this model is able to well reproduce the dyna mic behaviour of the plant.