【摘要】 针对太湖水质,采用响应面法(RSM)优化臭氧-混凝工艺。在单因素试验的基础上,选取臭氧(O3)投加量、混凝剂投加量和停留时间为影响因子,CODMn去除率、浊度去除率和运行成本为目标响应,利用Box-Benhnken design(BBD)进行3因素3水平实验设计,研究各自变量间的单独与交互作用及对响应值的影响。根据拟合的线性二次回归方程得到臭氧-混凝的最佳工艺条件为:以硫酸铝作混凝剂时,O3投加量0.9 mg/L,混凝剂投加量35mg/L,接触时间17 min;以聚合氯化铝作混凝剂时,O3投加量0.9 mg/L,混凝剂投加量24 mg/L,接触时间17 min。该条件下可使臭氧-混凝过程中CODMn和浊度的去除率达到最大,同时运行成本费用最低。更多还原

【Abstract】 Response surface methodology( RSM) was applied for optimizing the enhanced coagulation process by preozonation for Taihu lake water. Based on single-factor experiments,three independent variables( ozone dosage,coagulant dosage and residence time) were selected as affecting factors and three dependent variables( chemical oxygen demand( CODMn) removal efficiency,turbidity removal efficiency and operating cost) as responses. An experimental design of three factors and three levels was arranged through Box-Benhnken design( BBD). According to the proposed quadratic models,maximal CODMnand turbidity removal efficiencies and minimal operating costs are obtained at following optimum condition: The ozone dosage,coagulant dosage and residence time are found to be 0. 9 mg / L,35 mg / L and 17 min for aluminum sulfate( AS) and 0. 9 mg / L,24 mg / L,and 17 min for polymerization aluminum chloride( PAC),respectively.更多还原