PVDF荷负电功能超滤膜组件饮用水深度处理工艺

Technological Process of Negatively Charged PVDF Functional UF Membrane Module for Drinking Water Advanced Treatment

采用新型的荷电功能超滤膜,初步研究了PVDF荷负电功能超滤膜组件以青草沙原水+絮凝+砂滤+荷负电功能超滤中试运行工艺进行饮用水深度处理,系统表征NC-PVDF功能超滤膜对低温砂滤出水的部分水质指标的去除效果。初步中试运行结果显示,NC-PVDF功能超滤膜组件膜产水的细菌总数为0、总大肠杆菌群未检出,NC-PVDF一方面具备常规超滤膜的分离性能,对低温砂滤池出水(膜进水)的硝酸盐氮、铝、氯化物、硫酸盐、氟化物、总硬度没有明显的去除效果;另一方面NC-PVDF具有特殊的分离性能,对低温砂滤池出水的浊度、COD Mn均有一定的去除效果,且膜产水的pH、UV 254较膜进水均下降。

NC-PVDF was negatively charged PVDF functional ultrafiltration(UF)membrane module.NC-PVDF had been utilized on advanced treatment of drinking water.The advanced treatment process was Qingcaosha raw water+flocculation+sand filtration+negatively charged functional UF membrane.Removal efficiency of part water quality indexes of sand filtration effluent(the effluent of UF membrane)with low temperature is studied systematically.Results show that the number of total bacteria is zero and the total coliform group was not found in the effluent of NC-PVDF functional UF membrane module.This functional UF membrane gave none obvious removal effect of NO-3,total aluminum,Cl^-,SO2^-4,F-,total hardness of Ca^2+and Mg^2+,but the removal efficiency of turbidity and COD Mn were excellent,whereas pH and UV 254 were decreased。