印染废水回用的反渗透预处理技术

Reverse Osmosis Pretreatment Technology for Printing and Dyeing Wastewater Reuse

文章主要针对如何对印染废水进行预处理,降低其主要污染物浓度,满足回用要求这一问题进行研究。将某污水处理厂试验基地的二级生化出水视为此次研究对象,比较分析混凝沉淀-超滤(简称“组合工艺A”)、混凝沉淀-BAC(生物活性炭滤池)-超滤(简称“组合工艺B”)、BAC-超滤(简称“组合工艺C”)这三种工艺,考察作为反渗透预处理技术实施的可行性。结果表明,采用组合工艺B作为预处理工艺为反渗透预处理技术的最佳工艺。

Printing and dyeing wastewater has high salinity,organic concentration and chromaticity,which is difficult to reuse.This paper mainly focuses on how to pretreat printing and dyeing wastewater,reduce the concentration of its main pollutants,and make it meet the requirements of reuse.Taking the secondary biochemical effluent from the test base of a sewage treatment plant as the research object,the three processes of coagulation sedimentation ultrafiltration(hereinafter referred to as combined process a),coagulation sedimentation BAC(biological activated carbon filter)-ultrafiltration(hereinafter referred to as combined process B)and BAC ultrafiltration(hereinafter referred to as combined process C)were compared and analyzed to investigate the feasibility of implementing as reverse osmosis pretreatment technology.The above results show that compared with combined processes a,B and C,combined process B is the best pretreatment process of reverse osmosis pretreatment technology.