膜污染机理与化学清洗方式研究

Research of the membrane fouling mechanism & chemical cleaning methods

膜污染是膜技术应用中面临的关键问题,其影响膜运行的稳定性,决定膜清洗周期以及膜的更换频率。因此,要使膜获得长期稳定的运行效果,必须研究其膜污染的机理与清洗方法。确定了膜污染机理,对于了解膜通量下降原因、预测膜通量、控制和消除膜污染具有指导意义。膜面形成污染层,会影响通量以及脱盐率,因此需定期进行膜清洗以恢复性能,但也有不可恢复的损失,造成运行成本提高。故文中总结了膜清洗的方式与污染机理以望对膜行业的发展有所促进作用。

Membrane fouling was a crucial issue in the application of the membrane technology.It was influenced the stability of the membrane operation,and determined the period of the membrane cleaning and the replace frequency of the membrane.Therefore,it was researched the membrane fouling mechanism and the membrane cleaning method so that operates smoothly,safely.It was possessed directive significance to the understand the decrease reason of the membrane flux、 predict membrane flux、controlled and eliminated membrane fouling by determined the membrane fouling mechanism.Formation of the pollution layer on the membrane face influenced the flux and salt rejection,so it was needed the regularly membrane cleaning in order to reinstate membrane performance.But there was some unrecoverable loss,and caused the increase of the running cost.It was summarized the membrane fouling mechanism and membrane cleaning method in order to promote the development of the membrane industry.