响应面分析法优化有机污染原水的处理工艺

Optimization of Treatment Process for Organic Pollutants Contaminated Raw Water by Response Surface Methodology

为应对长江水源水突发有机污染问题,在常规工艺的基础上,增加高锰酸盐预氧化工艺,并采用响应面分析法优化工艺参数。基于Box-Benhnken design(BBD)试验设计原理,进行了3因素3水平的响应面分析试验,分析得到了目标响应CODMn去除率与混凝剂投加量、KMnO_4投加量及氧化时间的二次回归模型,并根据Design Expert软件优化得到的最佳工艺参数如下:混凝剂投加量为32 mg/L,KMnO_4投加量为1.08 mg/L,氧化时间为29 min,在此条件下,对COD_(Mn)的去除率为48.89%。

In the case of the raw water suddenly contaminated by organic pollutants in Yangtze River, permanganate pre-oxidation process was added based on the conventional technologies, and process parameters were optimized by response surface analysis. The experiments of three factors and three levels were conducted on the basis of Box-Benhnken design （BBD） experimental design principles, and a quadratic regression model for relation of CODMn removal rate with coagulant dosage, KMnO4 dosage and oxidation time was obtained. The optimum parameters were determined by Design Expert software： coagulant dosage of 32 mg/L, KMnO4 dosage of 1.08 mg/L and the oxidation time of 29 rain. Under this condition, the actual removal rate of CODMn was 48.89%.