Study On Hydraulic-Biological Coupling Modeling In Activated Sludge System And Its Applications

Nowadays, removal of pollutant in wastewater has been focusedbecause of the more serious water pollution. The calibration ofwastewater treatment project is always very difficult that it is carried outbase on the experience and result better or worse after the calibration isunknown. Simulation program of wastewater treatment plant is quitedemanded as guide for WWTP optimization management and design.Activated sludge system is more applied in WWTP and many model ofactivated sludge system have been proposed such as ASMs and TUDPModel and so on. All of these models described the pollutant removalprocess in homogeneous conditions.This study focused on a new model establishing which is base onASMs and TUDP model. Hydraulic model is deduced according to thediffusion theory. Hydraulic model and the new biological model ATCMare coupled based the mass balance theory so the new modelHydraulic-Biological Model is set up.Finite element mathematics analysis is employed for model solving. A simulation program is designed based on MATLAB and it can simulateentire process of activate sludge system AAO technics. Also thesimulation results are shown in fig form so manager can realize theresults convenience and intuitionistic.The validation and calibration of model are carried out based on thedatum from Deqing Shishan wastewater treatment plant and modelparameters are equal to the values EAWAG recommended. The HBCMmodel has been proved valid compared the datum tested in DeqingShishan WWTP.The research on HBCM application in AAO technics is carried out.The process is simulated when technic variable changed in different valusand results will show the best technic variables for WWTP manage.