膜科学与技术

聚偏氟乙烯再生膜的制备与性能研究

作者：顾维娣，田艺苑，陈莹蕾，任月萍，李秀芬，王新华，夏浩杰，李依航

单位：江苏省厌氧生物技术重点实验室，江苏省水处理技术与材料协同创新中心，江南大学环境与土木工程学院，无锡 214122

关键词：废旧平板膜；聚偏氟乙烯；再生膜；膜性能表征

出版年,卷(期):页码： 2016,36(5):47-52

摘要：

本文考察了以MBR生活污水和微电子电镀废水处理工程产生的废旧平板膜表面的PVDF制备再生膜的过程中，废旧PVDF占再生膜铸膜液中总PVDF的比例对再生膜结构和性能的影响．实验发现向铸膜液中掺杂33%从废旧膜面提取得到的PVDF，对再生膜(DS-33和ME-33)铸膜液粘度影响不大，然而将从废旧膜面提取得到的PVDF的掺杂量增大到75%后，再生膜(DS-75和ME-75)铸膜液粘度有所降低，相应DS-75和ME-75的皮层结构致密程度较新膜低．制备得到的再生膜表面的水接触角与新膜相比相差不大，且新膜和再生膜表面均为亲水性表面．以新膜和再生膜运行MBR小试装置，四个再生膜组件的出水COD和NH3-N浓度与新膜膜组件相比相差不大，出水浊度均小于1 NTU．

The influence of the doping amount of the polyvinylidene fluoride (PVDF) extractive from waste flat membranes of domestic swage and electroplating wastewater membrane bioreactor (MBR) engineering into the casting solutions on the structure and performance of the recycled PVDF flat membranes has been investigated in this paper. According to the experiment results, the viscosity of the casting solutions doping 33% PVDF extractive were similar with that of the new membrane casting solution. The viscosity of the casting solutions with 75% PVDF extractive doping amount decreased and the corresponding DS-75 and ME-75 recycled membranes exhibited relatively incompact cortexes compared with the new membrane，the DS-33 and the ME-33 recycled membranes. The water contact angles of the new membrane and the recycled membranes were very similar and the membrane surfaces were all hydrophilic. The performance of the membranes were tested in a small experimental MBR and the COD and NH3-N concentrations in the effluent of the four recycled membranes were almost the same with that of the new membrane. Moreover, the turbidity of the effluent of the membranes were all lower than 1 NTU.

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