膜分离技术应用于给水处理中的膜污染研究
Research on membrane fouling in application of membrane separation technology in feed water treatment
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摘要: 针对膜分离技术应用于给水处理系统中的膜污染问题进行了研究。结果表明，采用亲水性的膜进行给水处理，膜污染可以分为浓差极化污染、可清除污染和不可清除污染三大部分，根据达西方程计算膜分离过程中的阻力，其中膜本身阻力占总阻力的51.2%，浓差极化阻力占21.9%，而可清除污染阻力和不可清除阻力相对较小。因此，在给水膜分离系统中若通过优化操作条件减小浓差极化污染，就可达到改善膜污染的目的。Abstract: In the process of applying the membrane separation technology to feed water treatment, membrane fouling is researched. The results showed that membrane fouling may be divided into three parts: concentration polarization fouling, reversible fouling and fouling which is not easy to clean. The resistance is calculated according to Darcy’s equation. In total resistance, 51.2% is membrane resistance, 21.9% is concentration polarization resistance, moreover, reversible resistance and irreversible resistance are less correspondingly. Therefore, in the process of applying the membrane separation technology to the feed water treatment, if the concentration polarization fouling is minished by optimizing the condition in operating, membrane fouling is not restriction of membrane separation technology.
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