摘要
在单因素实验的基础上,以色度和COD去除率为评价指标,染料废水的初始p H值、铁碳比以及反应时间为考察因素,采用Box-Behnken方案构建与拟合响应曲面模型,通过该模型分析了这3个独立变量以及变量之间的交互作用对色度和COD去除率的影响,并确定了最佳工艺,即当控制曝气量9.42 L/min时,p H值为3.5,铁碳比为0.75,反应时间为35 min,COD和色度的去除率分别达到83.1%和87.8%,回归模型的预测值和测定值偏差率分别为0.7%和0.4%。
Based on the single factor test,the Box-Behnken response surface methodology was conducted for modeling and optimization conditions on the treatment of dye wastewater by iron-carbon micro-electrolysis. In this case,chromaticity and COD removal efficiency were selected as response values while the initial p H of dye wastewater,the ratio of iron to carbon and reaction time were considered as operational variables. Effects of the independent parameters and their interaction on chromaticity and COD removal efficiency were studied respectively. Moreover,when the aeration rate was 9. 42 L / min,the optimum conditions of micro-electrolysis treatment were as follows: initial p H of 3. 5,ratio of iron to carbon of 0. 75 and reaction time of 35 min. Under such conditions,the removal efficiency of chromaticity and COD were 83. 1% and 87. 8%,respectively. The error of the model-predicted and experimental values of chromaticity and COD removal efficiency were 0. 7% and 0. 4%,respectively.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第6期2911-2917,共7页
Chinese Journal of Environmental Engineering
