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浓差极化超滤浓缩生物大分子溶液
Authors
万印华
焦小光
+3 more
苏志国
陈向荣
马光辉
Publication date
1 January 2008
Publisher
Abstract
提出一种利用浓差极化原理超滤浓缩生物大分子溶液的新型膜过程,即用自行设计的浓缩液汲取装置,抽提出浓差极化层内的浓溶液.以牛血清蛋白(BSA)为模型大分子,考查了汲取速率、透过通量对浓缩液浓度的影响,提出了动态平衡时浓缩液浓度的计算公式,并发展了一种可获得较高浓度浓缩液的周期性短时间歇汲取工艺,同时将新型膜浓缩过程与常规超滤浓缩进行了对比.结果表明,浓缩液浓度随汲取速率减小而增大,高通量不利于高浓度浓缩液的汲取;动态平衡时浓缩液浓度的计算值与测定值吻合良好;采用周期性短时间歇汲取工艺浓缩液浓度可达34.9g/L,为原料液浓度的69.8倍;与常规超滤浓缩相比,该浓缩过程膜污染显著减轻,可实现连续操作
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Last time updated on 11/04/2021