本项目针对正渗透净水过程膜污染问题，拟研究钙离子对有机物形成膜污染的影响机制和调控方法。通过研究原水水质特征、膜材料特性及膜运行工况等对形成钙离子和有机物复合膜污染的影响，揭示钙离子对有机物形成膜污染的影响因素和规律，为深入理解正渗透膜污染行为提供理论参考；同时，研究减弱正渗透膜有机污染的预处理工艺、膜表面改性和膜优化运行方法，为降低膜污染提供理论支撑和技术支持。

This project focuses on studying the mechanism of the influence of calcium cation on forward osmosis membrane fouling caused by organic matters and seeking corresponding controlling methods. Throughout the systematical study of the effect of feed composition, membrane material characteristics and operation condition on membrane fouling, it can be expected to obtain a basic revelation to the influence factors and mechanism of calcium on the forming of organic fouling, provide a theoretical guidance for understanding the dynamic behavior of forward osmosis membrane fouling. In addition, attempts on combination of pre-treatment process, surface modification and optimal operation are made to provide technical support for alleviating fouling in drinking water production by forward osmosis.