响应面法优化电化学法处理高盐榨菜废水工艺

Optimization of electrochemistry for treatment of mustard wastewater by response surface methodology

针对榨菜废水中较高的盐度对微生物的抑制和处理效能不稳定问题,开展电化学法处理高盐榨菜废水的实验研究。利用响应面法(RSM)探讨了榨菜废水COD的去除率与电流密度、极板间距和pH值之间的关系。通过Design-Ex-pert 7.1数据处理软件得到一个二次响应曲面模型以及优化的水平值。结果表明,最佳反应条件为电流密度为12.37 A/dm2,极板间距为18.82 mm,pH为5.92,此条件下COD去除率为83.21%(预测值为83.25%)。二次响应曲面方差分析结果表明,回归模型达到显著性水平,在研究区域内拟合较好,模型的精密度、可信度和精确度均在可行范围内,与实验结果吻合程度较高。

Against high salinity in mustard wastewater inhibited microbial and processing performance instability,electrochemical was utilized to treat high-salt mustard wastewater.Response surface methodology（RSM） was used to investigate the effect of current density,electrode spacing,and pH values on COD removal.Data were analyzed by the software of Design-Expert 7.1,a quadratic response surface model and optimum level values in terms of actual factors was obtained based on the experimental data.The result showed that the optimum conditions of current density,electrode spacing,and pH values were 12.37 A/dm2,18.82 mm,5.92,respectively,at this time,the removal rate of COD was 83.21%（forecast value was 83.25%）.Quadratic response surface analysis of variance results showed that regression model reached significant level,fitted well in the study area,model precision,reliability and accuracy were in the extent practicable,having higher coincide degree with the experimental results.