电镀综合废水的纳滤膜深度处理研究

通过单根纳滤（NF）膜组件对经过超滤和反渗透膜处理后的综合电镀废水进行了NF膜深度回用处理.考察了进水压力、进水浓度、浓差极化现象对不同纳滤膜组件（NF90和NF270）分离性能的影响.结果表明，进水压力控制在1.6 MPa左右时分离截留效率最佳，而随着进水浓度的增加，NF90膜易受浓差极化影响，而当表面流速大于0.2 m·s^-1时NF270受浓差极化影响较小，适合工程应用. 并通过工程实例试运行，初步考察了其工程应用的可行性.

Study on reuse of nanofiltration membranes for application in the treatment of synthetical electroplating wastewater

According to the research on working state of single nanofiltration membrane that dispose the synithetical electroplating wastewater,we investigat the influence of operating pressure, concentration polarization and different nanofiltration membrane modules（NF90 ＆ NF270）on efficiency of interception. The NF270 system shows a high efficiency of interception when surface velocity is above 0.2 m s-1 and the operating pressure is about 1.6 MPa while the NF90 is highly influenced by concentration polarization. The reuse possibility of electroplating wastewater is initially tested through the engineering case.