作　　者： ; ; ; ; ;

机构地区： 浙江理工大学材料与纺织学院

出　　处： 《中国给水排水》 2007年第15期69-72,共4页

摘　　要： 采用曝气生物滤池-纳滤工艺对某印染厂废水处理站排放口出水进行再生回用处理，考察了处理效果。结果表明，在水力负荷为1．02m^3／（m^2·h）时，曝气生物滤池对COD的去除率为31．4％；混凝沉淀和机械过滤的纳滤预处理工艺的出水浊度平均为1．64NTU，出水SDI值平均为4．1；纳滤系统的水回收率随运行时间的延长而下降，压力差则随运行时间的延长而上升：在进水TDS为3750～4280mg／L时，纳滤系统的平均脱盐率为96．1％；化学清洗后的水回收率可恢复至系统运行初期的94％，清洗前、后纳滤系统的脱盐率没有明显变化。组合工艺的出水水质可满足设计的回用水水质要求。 Biological aerated fiher （BAF）/nanofiltration （NF） process was used for the advanced treatment of the treated effluent from a dyeing and printing factory. The pilot-scale experiments were carried out and mainly focused on the effect of this process. The results show that when the influent load is 1.02 m^3/（m^2 · h）, the COD removal rate in BAF is 31.4%. The coagulation and conventional filtration were chosen as the pretreatment process of nanofihration. After the pretreatment, the average turbidity is 1.64 NTU and the average SDI number is 4.1. During the experiment, the water recovery rate of nanofiltration is slowly decreased and the pressure difference is slowly increased. When the influent TDS ranges from 3 750 to 4 280 mg/L, the average desalination rate of nanofihration is 96. 1%. After chemical cleaning, the water recovery rate can be restored to 94% of the previous number, but the desalination rate has no distinct variation. The effluent quality of the process can meet the reuse requirement of dyeing and printing factory.

关 键 词： 印染废水 曝气生物滤池 纳滤 再生回用

领　　域： [环境科学与工程]