还原水解-生物膜工艺处理印染废水中试研究

PILOT STUDY ON THE TREATMENT FOR DYEING WASTEWATER

采用物化处理工艺(还原)及生化处理工艺(水解+生物接触氧化+曝气生物滤池)联合处理难降解印染废水,并对试验现象和结果进行了分析。中试试验结果表明,混凝剂投加量为100 mg·L-1,水解酸化池、接触氧化池、曝气生物滤池的水力停留时间分别在8、9、5 h时,COD、BOD5、SS及色度的去除率分别可以达到97%、96%、98%和95%以上,出水指标能够达到纺织染整工业水污染物排放标准(GB 4287-92)的一级标准,为处理难降解印染废水提供了有效可行的处理思路及方法。

The process of physical chemistry（deoxidization by FeSO4）and the process of biological chemistry（hydrolyzation and biological contact oxidation and biological aerated filter） are used to treat the dyeing wastewater,which is difficult to biodegrade.At the optimum parameters（concentration of flocculant is 100 mg.L-1,HRT of hydrolyzation,biological contact oxidation and biological aerated filter are 8 h,9 h and 5 h,respectively）,the ratio of SS、COD、LAS and NH3-N are above 97%,96%,98% and 95%,respectively.It is shown that at the optimum condition,the values of the effluent can reach the standard of GB 4287-92.It was proved that the combined process had the profound application in the treatment of the wastewater.