根据胜华炼油厂曝气沉淀池 1996年的实际运行数据 ,按照活性污泥法运行控制条件F/mb=0 .3～ 0 .6分析了曝气沉淀池的运行工况。结果发现 ,大部分时间内曝气沉淀池处于非良性运行工况下 ,池内养料相对不足。采用数学回归方法建立了出水底物浓度数学模型 (COD模型 )。方差分析表明 ,多元非线性回归的拟合相关性较好。当θ <2 5℃时 ,回归方程的相关系数R =0 .95 ;当θ≥ 2 5℃时 ,R =0 .94。根据拟合方程 ,用C语言对曝气沉淀池处理过程进行了计算机模拟 According to the Shenghua refinery aeration sedimentation tank actual operating data in 1996, according to the activated sludge control conditions F / mb = 0 .3 ~ 0 .6 analyzed the operation of aeration tank. The results showed that most of the time the aeration sedimentation tank in the non-benign operating conditions, the relative lack of nutrients in the pool. Mathematical regression model was used to establish the mathematical model of effluent substrate concentration (COD model). Variance analysis showed that the fitting correlation of multivariate nonlinear regression was good. When θ <25 ℃, the correlation coefficient of the regression equation is R = 0.95; when θ≥25 ℃, R = 0.94. According to the fitting equation, C language was used to simulate the process of aeration sedimentation tank