Influence of calcium-NOM complexes on fouling of nanofiltration membranes in drinking water production

被引：5
|
作者：
Cornelissen, E. R. [1 ]
Siegers, W. G. [1 ]
Ogier, J. [1 ]
Beerendonk, E. F. [1 ]
机构：
[1] Kiwa NV, NL-3430 BB Nieuwegein, Netherlands
来源：
5TH WORLD WATER CONGRESS: DRINKING WATER QUALITY AND TREATMENT | 2006年 / 6卷 / 04期
关键词：
calcium effects; membrane cleaning; membrane fouling; nanofiltration; natural organic matter; water treatment;
D O I：
10.2166/ws.2006.765
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
The application of nanofiltration is growing rapidly in drinking water and wastewater treatment. The co main problem during the operation of nanofiltration membranes is membrane fouling, part of which is due to the presence of Natural Organic Matter (NOM) in sources for drinking water. In this work the effect of CD calcium was investigated on the nanofiltration fouling behavior in relation to NOM. From Li and Elimelech C (2004) it is known that calcium enhanced membrane fouling significantly due to the formation of calcium-NOM complexes. Two techniques were used in our research to determine the part of calcium which is complexated by NOM and the free calcium ion in solution. Results showed that a minimum calcium concentration and a minimum NOM concentration were required for calcium-NOM complex formation. Furthermore, the influence of the calcium concentration on the flux decline during nanofiltration experiments was investigated for different types of feed water. The observed flux decline was proven to be only caused by NOM fouling rather than other membrane fouling types, such as biofouling, scaling or particulate fouling. Fouling of nanofiltration membranes was related to the calcium content in the feed water, and more specifically to the calcium-NOM complex concentration. Membrane cleaning with SIDS was found to be very effective.
引用
收藏
页码：171 / 178
页数：8
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