摘要
膜蒸馏(MD)作为一种有前景的高盐废水处理技术而受到广泛关注.然而,由于实际废水成分复杂,MD的实际应用面临膜润湿、膜污染和膜结垢三大关键挑战,易导致膜通量和选择性降低,甚至膜失效.本文首先简述不同种类污染物诱导的膜润湿、污染和结垢的特点及其形成原因.随后,重点介绍了 目前抗润湿、抗污染、抗结垢新型膜的研究进展,包括超疏水膜、全疏膜、常规Janus膜和致密Janus膜的设计原则、抗性机理及其适用范围.此外,讨论了通过对进料预处理、操作条件调控的辅助手段以及膜再生来进一步保证MD长期运行的稳定性.
Abstract
Membrane distillation(MD)has attracted widespread attention as a promising technology for high-salt wastewater treatment.However,due to the complexity of the actual wastewater composition,the practical application of MD still faces three key challenges:membrane wetting,membrane fouling and membrane scaling,which ultimately lead to reduction of membrane flux and selectivity,even membrane failure.In this study,the characteristics and causes of membrane wetting,fouling and scaling induced by different kinds of substances were briefly described.Subsequently,it focused on the current research progress of novel membranes against wetting,fouling,and scaling,including the design principles,resistance mechanisms and the application scopes.In addition,methods of pretreatment,operating condition regulation and membrane regeneration were also discussed to further ensure the long-term stability of MD.
NETL
NSTL
维普
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