响应面法优化海绵铁/碳微电解技术预处理腈纶废水  

Sponge iron-carbon micro-electrolysis pretreatment of acrylic fibre wastewater using response surface methodology (RSM)

作　　者：白帆[1] 李杰[1] 王亚娥[1] 周岳溪[2] 

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070 [2]中国环境科学研究院,北京100012

出　　处：《环境工程学报》2017年第7期3957-3964,共8页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07201-005)

摘　　要：以腈纶废水的进水pH值、海绵铁投加量、铁碳质量比及反应时间为考察因素,COD去除率为评价指标,在单因素实验基础上,通过Box-Behnken方案构建与拟合响应曲面模型,分析了此4个独立因素及因素之间的交互作用对COD去除效果的影响,确定了最佳预处理工艺,即当进水pH为2,海绵铁投加量为35 g·L^(-1),铁碳质量比为0.5,反应时间为75 min时,COD去除率可达29.59%,回归模型的预测值为29.68%,该模型可靠。并考察了预处理对生化系统的影响,在进水COD均值923.09 mg·L^(-1)条件下,最终出水浓度为232.89 mg·L^(-1),去除率为74.77%,较单独生化处理提高25.49%。Based on the single-factor test,the Box-Behnken response surface methodology was used for modeling and optimizing conditions for the treatment of acrylic fiber wastewater by sponge iron-carbon micro-electrolysis. In this case, COD removal efficiency was selected as a response value,whereas influent pH, sponge iron dosage,i- ron-carbon mass ratio, and reaction time were considered operational variables. Effects of the independent param- eters and their influence on COD removal efficiency were studied. Moreover,optimum conditions for micro-elec- trolysis treatment were as follows ：influent pH = 2,iron-carbon mass ratio = 0.5, sponge iron dosage = 35 g·L^-1, and reaction time =75 min. Under such conditions,the removal efficiency of COD was 29.59% ,and the predic- tive value of the regression model was 29.68% ,indicating the reliability of this model. Furthermore,the effect of pretreatment on biochemical systems was investigated. Under conditions at the COD average of 923.09 mg ·L^-1 ,the final effluent concentration was 232.89 mg·L^-1, and the removal rate was 74.77% ;the removal rate increased by 25.49% compared to biological treatment alone.

关 键 词：海绵铁 铁碳微电解 响应曲面法 预处理 腈纶废水 

分 类 号：X703[环境科学与工程—环境工程]