组合膜分离技术资源化处理印染废水工艺的研究

为解决印染废水的资源化处理问题,针对实际印染废水研究了以超滤和纳滤膜分离技术为核心的印染废水处理及回用工艺在工程上的可行性。实验结果表明:还原染料废水采用超滤系统处理,膜出水水质即能够满足印染厂内回用水质要求;活性染料废水通过纳滤浓缩能够获得较好的染料回收效果。采用双膜膜分离系统(UF+NF)能够使两种染料废水的污染物均得到明显去除,还原性染料废水的总悬浮物、COD、浊度和色度的去除率达到了100%、95.21%、92.86%和100%;活性染料废水上述各项指标去除率达到100%、82.85%、98.46%和99.43%。双膜膜分离系统适用于工业印染废水处理及染料回收,是资源化处理印染废水的发展方向。

Research on technique of separation process of combined membrane for extile wastewater resource

In order to solve the problem of treatment and reusing of textile wastewater,the paper studied the feasibility of engineering of industrial water treatment and dye recycling which take the technique of ultrafiltration and nanofiltration membrane separation as the core according actual situation.The results showed that vat dye wastewater effluent treated by UF process can meet the water quality standard of dyeing mills water recycling;while the reactive dye wastewater can get better effect of dye recycling via nanofiltration.The separation process of UF+NF can evidently remove the pollutant of vat dye and reactive dye wastewater.The removal rate of SS , COD, turbidity and chromaticity color is up to 100%, 95.21%, 92.86% and 100% for vat dye wastewater,and that is up to 100%, 82.85%, 98.46% and 99.43% for reactive dye wastewater respectively. The separation process of UF+NF is fit to dye wastewater treatment and dye recycling of industry and is the development direction of resource processing of textile wastewater.