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Discussion about the assessment of ultrafitration membranes retention performance by seprating protein method
Authors： Luo Ming, Shang Min, Zhengxiang*
Units： School of environment and natural resources, Renmin University of China, Beijing, 100872
KeyWords： ultrafitration membrane; MWCO; standard substance.
ClassificationCode：TQ028
year,volume(issue):pagination： 2014, 34(6):56-61

Abstract：

Solute rentention method is widely used for determining the ultrafitration membrane separation performance. This study investigates the accuracy of MWCO (Molecular Weight Cut Off) determined by using different protein molecules. A series of experiments have been carried out to determine protein retention in various conditions (runtime, protein concentration and transmembrane pressure) during filtration through hollow fiber membrane and flat-sheet membrane. The results show the BSA rejection rate increased as the initial concentration increasing, the retention rate changed from 3.5% to 80.7% when initial concentration increased 100mg/L to 1000mg/L. And the MWCO was inaccurate with high concentration of protein molecules. High concentration may cause error of the MWCO test, but low concentration may influence the stability of the test results. With adjusting the concentration to 100-500mg/L and the runtime to 40min, the data of MWCO could be more reliable.

Funds：
“十二五”国家科技支撑计划：村镇建设工程标准体系研究(2012BAJ19B02);教育部“新世纪优秀人才支持计划资助”（NCET-12-0531）

AuthorIntro：
罗鸣（1989- ），女，籍贯陕西，中国人民大学硕士研究生，主要从事水处理与膜技术研究，

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