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利用US/UV/Fenton联合技术处理抗生素制药废水,选择FeSO4投加量、紫外光照射时间和超声波时间为自变量,以废水COD去除率为响应值,基于Box-Behnken响应曲面法,研究了各变量及交互作用对制药废水COD去除率的影响,并通过对回归方程的求解和响应曲面分析得到多元二次多项式方程的预测模型。结果表明,FeSO4投加量、紫外光照射时间和超声波时间与COD去除率存在显著的相关性,各影响因子显著性由高到低为超声波时间、紫外光光照时间、FeSO4投加量,FeSO4投加量与超声波时间的交互作用显著。所得预测模型回归性好,预测废水最大COD去除率为75.3%,最佳条件组合为:FeSO4投加量0.01 mol/L,紫外光照射90 min,超声波120 min。在此条件下进行验证试验,实际值与模型预测值具有良好的一致性,偏差为0.58%。
The antibacterial pharmaceutical wastewater was treated by US / UV / Fenton combined technology. The dosage of FeSO4, ultraviolet irradiation time and ultrasonic time were taken as independent variables. The COD removal rate of wastewater was taken as the response value. Based on Box-Behnken response surface method, Variables and interactions on the COD removal efficiency of pharmaceutical wastewater, and the prediction model of multivariate quadratic polynomial equation is obtained by solving the regression equation and response surface analysis. The results showed that there was a significant correlation between the dosage of FeSO4, the time of UV irradiation and the time of ultrasonic treatment and the removal rate of COD. The significant factors of the influencing factors from high to low were ultrasonic time, ultraviolet light time, FeSO4 dosage, FeSO4 dosage Interaction between dose and ultrasound time was significant. The regression model was good. The maximum COD removal efficiency of wastewater was predicted to be 75.3%. The optimum conditions were as follows: FeSO4 dosage 0.01 mol / L, UV irradiation 90 min and ultrasonic 120 min. Under the conditions of the verification test, the actual value and model predictions have good consistency, deviation of 0.58%.