对国际水质污染与控制协会（IAWQ）推出的活性污泥2d号模型（ASM2d）进行优化,使之能够模拟含有菌胶团的污水处理工艺。使用改良后的ASM2d模型模拟并分析了有机物、氮和磷在DE型双沟式氧化沟中的降解过程。(Activated sludge model 2d(ASM2d)proposed by IAWQ was modified. and it was used to simulate wastewater treatment containing biomass flocs. Combined with the operation parameters of a double-ehanne1 DE-oxidation ditch, a calculated model was built to simulate carbon, nitrogen and phosphorus degradation processes.)