响应曲面法优化电化学氧化处理染料废水工艺参数的研究

Process Parameter Optimization of Electrochemical Oxidation of Dye Wastewater by Response Surface Methodology

采用响应曲面分析中的Box-Behnken设计法,以电流密度、初始pH值、氯化钠浓度和反应时间为实验因素,以电化学氧化处理酸性粒子元青染料废水过程中的TOC去除率和能耗为响应值,通过响应曲面法结合优化期望函数得出电化学氧化最优效能的工艺参数。结果表明,分析得出的TOC去除率与反应能耗的多元二次回归模型均达到显著并有很好的相关性。电化学氧化最优工艺参数为电流密度55mA/cm^2,初始pH值为6,氯化钠浓度0.15mol/L,反应时间120min,在此条件下,TOC去除率为80.20%,能耗为19.85kWh/g(TOC),预测值与实际值之间的相对误差分别为2.2%与4.6%。表明此方法可用于优化电化学氧化处理染料废水工艺参数,为实际工程应用中制定高效节能的处理方案提供参考。

The Box-Behnken design was with current density,pH value,sodium chloride concentration,reactive time as independent variable,and TOC removal,energy consumption of electrochemical oxidation of Acid black 2 dye wastewater as responses.The electrochemical process parameters was optimized by response surface methodology and desirability function.The result indicated the multi-quadratic regression models for TOC removal rate and reaction energy consumption obtained by the analysis were significant and had good correlation.The optimal process parameters were as follow:current density of 55 mA/cm 2,initial pH value of 6,with a sodium chloride concentration of 0.15 mol/L and a reaction time of 120 min.Under optimal condition,a TOC removal of 80.20%and a energy consumption of 19.85 kWh/g(TOC)were achieved.Compared to the verification experiment consequence,the relative error was 2.2%and 4.6%,respectively.The results showed that this method could be used to optimize the process parameters of electrochemical oxidation treatment of dye wastewater,and provided useful information for formulating a high efficiency and energy saving treatment proposal in practical project.