电解与纳滤工艺联合处理十三碳二元酸生产中的废水  

Treatment of tridecane dicarboxylic acid wastewater by coupling technique of electrolytic oxidation and nanofiltration

作　　者：许莉[1] 王明毓[1] 王伟[1] 国文朋[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]大庆石化公司塑料厂,黑龙江大庆163714

出　　处：《化学工程》2008年第9期43-46,共4页Chemical Engineering(China)

摘　　要：十三碳二元酸生产中产生大量有机废水,为了去除其中高含量的COD和SO42-,首先采用电解法降解其中的有机物,再利用2级纳滤系统对电解残液进行分离。实验研究了钽基金刚石薄膜电极在不同电解工艺条件下对有机物降解的影响,确定了适宜的电解操作条件:槽电压1.6 V左右,电解时间7 h。又考察了在纳滤过程中的各种操作因素对膜过程的影响,探索出合适的纳滤系统的操作条件:操作压差为1.2—1.4 MPa;膜面十字流流速对于DL膜为0.15 m/s左右,对于SE膜为0.12 m/s左右;操作温度为35—40℃。经过联合处理后的废水COD去除率在99%以上,SO42-含量可以达到排放标准。To remove the COD and the SO4^2- of the wastewater in the production of tridecane dicarboxylie acid, the wastewater was treated by electrochemical oxidation to degrade organic substances firstly, and then it was separated by two-stage nanofihration system. The influence of boron-doped diamond thin membrane electrodes on the degradation of organic pollutant under different conditions was studied, and the optimum electrolytic conditions were determined as cell voltage of about 1.6 V, electrolysis time of 7 h. The influence of different operating conditions on nanofiltration process were also investigated, and the optimum operating conditions were found out as operating pressure of 1.2-1.4 MPa, cross-flow velocity of about 0. 15 m/s for membrane DL and about 0. 12 m/s for membrane SE, operating temperature of 35-40 ℃. The result shows that 99% COD in the wastewater can be degraded,and the concentration of the SO4^-2 can meet the discharge standard for wastewater.

关 键 词：十三碳二元酸 金刚石薄膜电极 电解 纳滤 

分 类 号：X703[环境科学与工程—环境工程] X787