期刊论文

中文

农产品加工

1671-9646

2016

7

17-20

10.16693/j.cnki.1671-9646(X).2016.07.034

(xsky2015003):武汉轻工大学大学生科研项目 (CXXL20151002):武汉轻工大学大学生创新创业训练计划项目

本校为第一机构

以截留分子量为100,50,10 kDa的超滤膜为分离介质、紫薯提取液为原料,研究过滤模式(两步法和三步法)对蛋白质和多酚分离性能的影响.结果表明,2种操作模式都可以有效去除蛋白质,但是两步法(50～10 kDa)比三步法(100～50～10 kDa)可得到更低的多酚去除率(更高的多酚得率).串联阻力模型分析表明,100kDa和10 kDa膜主要的过滤阻力为膜阻力,而50 kDa膜的全要过滤阻力为浓差极化阻力和滤饼阻力.

Ultrafiltration of purple sweet potato is carried out with membranes with molecular weight cut-offof 100, 50, 10 kDa. Filtration model with 3 steps and 2 steps are compared. The effect of filtration model on separation of protein and polyphenol was studied. Results showed that both filtration steps are efficient for protein removal, but 2 steps model （50-10 kDa） provided better polyphenol recovery than 3 steps model （100 kDa-50 kDa-10 kDa） . Resistance-in-series analysis showed that membrane resistance is the main resistance for 100 kDa and...