水解酸化-BAF法去除盐化工废水中氨氮实验与数学模拟

Experiments and Mathematical Simulation on Ammonia Removal in Treating Salt Chemical Wastewater by the Hydrolysis Acidification-BAF Method

目的找出水解酸化-曝气生物滤池对盐化工废水中氨氮去除率的影响规律,进而为工程实践中生物曝气滤池的运行参数设计与调控提供借鉴.方法通过正交实验和单因素实验获取水解酸化-曝气生物滤池处理盐化工废水的实验数据,利用SPSS软件和1stopt软件分别建立了单因素和多因素的数学模型.结果通过正交实验得到去除盐化工废水中NH4_+^-N的最优工作参数为p H=7.5,水力表面负荷为6(m·h^(-1)),容积负荷为9.6(kg·m^(-3)·d^(-1)),气水质量比为10%,流速为4 m/s,各因素影响曝气生物滤池反应效果的显著性为p H>流速>气水比>表面负荷>容积负荷.结论单因素模型确定各因素变化时盐化工废水出水氨氮去除率的变化规律,多因素模型得出盐化工废水出水氨氮去除率与各因素关系为F(x_1,x_2,x_3,x_4,x_5)=0.038 7×f_1(x)^(0.597)f_2(x)^(2.3×10^(-7))f_3(x)^(1.47×10^(-10))f_4(x)^(0.252)f_5(x)^(0.536).

This paper studied the influence law on ammonia removal by the hydrolysis acidification-BAF method for treating salt chemical wastew ater. Experimental data of treating salt of chemical waste by hydrolysis acidification-BAF method were obtained with orthogonal and single factor experiments. SPSS softw are and 1stopt softw are were used to established an univariate and multivariate mathematical model for simulation. Results show that the optimum operating parameters of NH＋4-N removal rate in salt and chemical wastew ater are p H of 7. 5,hydraulic surface load of6（ m·h^-1）,volume surface load of 9. 6（ kg·m^-3·d^-1）,gas-water ratio of 10%,flow rate of4（ m·s^-1）,respectively. The factor order of affecting BAF treating effect is p H velocity gasw ater ratio hydraulic surface load volume surface load. Conclusion is that the single factor model determines the ammonia removal rate regulation in each factor variation of salt chemical effluent. The relationship betw een the ammonia removal rate and various factors is F（x_1,x_2,x_3,x_4,x_5）=0.038 7×f_1（x）^0.597f_2（x）^2.3×10^-7f_3（x）^1.47×10^-10f_4（x）^0.252f_5（x）^0.536.