超滤膜分离纯化花生壳中水溶性膳食纤维

为探索花生壳中水溶性膳食纤维(SDF)的有效分离纯化方法和效果,选择适宜的膜组件,采用不同截留分子量的超滤膜以及优化膜分离过程的操作条件,对SDF提取液进行超滤分离,试验结果表明:选用PS-30聚砜膜,在压力为0.08MPa、料液比为1:75g/mL、温度为30℃时,分离纯化效果最为显著。其中,膜通量达到127.2L/(m2·h)、SDF的得率达到67.56%,非淀粉多糖(NSP)的质量分数由49.85%提高到92.36%,蛋白质量分数从5.53%降到0.92%。与传统的提取法比较,超滤膜分离纯化花生壳水溶性膳食纤维具有生产周期短,成本低,产品纯度高等优点。

Purification of water soluble dietary fiber (SDF) from peanut hull using ultrafiltration

In order to explore the effective purification technology for water soluble dietary fiber (SDF) from peanut hull,the suitable membrane module was determined.The separation of SDF extracting solution with ultrafiltration was conducted using membrane with different molecular weight cut-off and optimizing membrane separation process conditions.The results showed that PS-30 polysulfone membrane had the best separation effect under the operating conditions of pressure 0.08 MPa,ratio of material to liquid 1:75 g/mL,temperature 30℃.Under these conditions,the membrane flux reached 127.2 L/(m2·h),the yield of SDF was 67.56%,non-starch polysaccharides (NSP) quality fraction increased from 49.85% to 92.36%,and the protein quality fraction decreased from 5.53% to 0.92%.Compared with the conventional extraction method,ultrafiltration membrane separation technology has the advantages of short producing cycle,low manufacturing cost and high purity and quality.