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Effect of active layer structure on calcium carbonate scaling in reverse osmosis membrane systems
Authors： LIANG Songmiao, HU Lijie, YAO Yan
Units： Vontron Technology Co., Ltd., Guiyang, 550018, China
KeyWords： reverse osmosis membrane; calcium carbonate scale; leaf structure; the surface properties
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2021, 41(1):33-39

Abstract：

Leading to reduce the flux and operation life of membranes, Calcium carbonate scales was considered to be one of key issues urgently to be solved in reverse osmosis (RO) systems. In this paper, based on the perspective of the nucleation thermodynamics of calcium carbonate and the adhesion to the membrane, the effects of characteristics on membrane surface scales were studied by preparing RO membrane with different structures. The results showed that RO membranes with large leaf structure had a higher degree of scaling but were easy to desorb, hence, the flux attenuation rate was only 1.52%; in the meanwhile, RO membranes with small leaf structure had a lower degree of scaling but were hard to desorb, hence, the flux attenuation rate was 9.77%. In a word, this research provided a preliminary understanding with the control mechanism of calcium carbonate scaling in reverse osmosis systems and pointed out that the design of membrane apparent structure was a key measure for reducing calcium carbonate scales.

Funds：
国家重点研发计划项目（2017YFC0403900）；国家重点研发计划项目（2016YFE0118800）

AuthorIntro：
梁松苗(1977- )男，湖南涟源人，教授级高级工程师，主要从事水处理膜材料的研究与产业化，liangsongmiao@vontron.com

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