ASM2D was used as mechanism model for optimizing the activated sludge nutrient removal process.For minimizing the total design cost under the premise of meeting emission standards
the sensitivity of each parameter in the optimization model was analysed.The sensitivity of different parameters varies greatly
in which the objective function has the largest impact on the design results with a sensitivity value of -99.02%.The maximum sensitivities of influent components
stoichiometric parameters and kinetic parameters are 16.06%
11.9% and 7.60%
respectively.With the decline of emission standards
the total cost also will be reduced.Through sensitivity analysis in optimization design
the influence extent of important parameters on the optimization results can be obtained
which also provide theoretical bases for parameters calibrating and results outputing.