摘要
采用四室电渗析反应器对农药生产污水处理厂尾水进行深度处理,尾水电导率为4.83 mS/cm,残留较高含量的NaCl和Na2SO4,同时残留毒性有机污染物,通过测定发现2-氨基-4-甲基苯并噻唑、粉唑醇和三环唑为其主要特征污染物,出水电导率为0.202 mS/cm,脱盐率为95.8%,离子去除率达90%以上,TOC去除率为72.2%,出水浊度和色度大幅改善,但存在出水偏酸的问题。废水中Na+、SO42-和Cl-分别被回收到浓缩室和阴极室形成酸碱循环利用。离子交换膜污染后,发现处理时间延长、出水水质TOC含量升高的问题,其中阳离子交换膜主要受到2-氨基-4-甲基苯并噻唑的污染,阴离子交换膜上污染物较为复杂,通过酸碱清洗和活性剂清洗均可使膜性能得到良好的恢复。
A four chamber electrodialysis was used for advanced treatment of pesticide tail water with conductivity of 4.83 mS/cm. It was found pesticide tail water has high concentration ofNaCl and Na,S04, and the main toxic organic compounds such as are 2-Amino-4-methylbenzothiazole, flutriafo and tricyclazole. The electrodialysis etlluent is good, that the conductivity is 0.202 mS/cm with 95.8% desalination rate, removal rate of ions and TOC reach to 90% and 72.2%. Meanwhile turbidity and color had been improved, Na＇, SOl, Cl are recovered as acid and alkali. When ion-exchange membrane were polluted after many times operation, the operation time was extended, and TOC content increased. However flutriafo have a big influence on the pollution of cation-exchange membrane. The pollutants on anion exchange membrane are complicated, but it has a good recovery by sour and alkali washing and chemical cleaning.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第4期70-74,78,共6页
Technology of Water Treatment
基金
国家"十二五水专项"(2012ZX07101-003)
江苏省环保基金项目(201103)
关键词
四室电渗析
深度处理
毒性有机物
盐分
膜污染
酸碱回收
膜清洗
four chamber electrodialysis
advanced treatment
toxic organic compounds
high salt
rrembranepollution
acid andalkali recovery
membrane cleaning
