酵母溶液超滤渗滤分离研究

采用MWCO为5000的超滤膜对酵母溶液进行超滤渗滤研究。结果表明，超滤通量随操作压力和温度的升高而增大，且在较高操作压力下的通量衰减较快，推导出超滤通量和料液溶质浓度的对数呈线性关系，可以对超滤通量变化情况作较好预测；随超滤和渗滤的进行，浓缩液中蛋白质主体浓度逐渐升高至20mg／mL，而超滤液和渗滤波中蛋白质最终浓度仅为0．3mg／mL，蛋白质被去除率达90％以上；浓缩液和渗滤液中海藻糖浓度几乎相同，最终浓度下降到0．9mg／mL左右，总回收率达到80％以上。

Study of the yeast separation through ultrafiltration and diafiltration

The process of yeast' s ultrafiltration and diafiltration is investigated using membrane of MWCO5000,the result indicated that membrane permeate flux increase with the increases of operational pressure and temperature,and the flux attenuate swiftly under the higher operation pressure.moreover,the relativity of feed concentration and the permeate flux was deduced in the paper.Ultrafiltration and diafiltration purification the yeast using the membrane,gave rejection rate of more than 90%for protein,over 80% yield values for trehalose,respectively.