石风强,景文珩,邢卫红

• 1:南京工业大学材料化学工程国家重点实验室

摘要(Abstract)：

气升式纳滤装置是一种新型膜过滤装置,具有能耗低、过滤条件温和等优点,在生化产品的分离纯化中应用前景广泛。以杆菌肽水溶液为过滤体系,采用孔径为0.9 nm的TiO2陶瓷纳滤膜,系统考察了曝气量和跨膜压差对气升式纳滤装置过滤性能的影响。结果表明,曝气可有效提升通量和截留率;当跨膜压差为0.3 MPa时,曝气量由20 L h 1增大到100 L h 1,通量和截留率分别提升34.0%和14.5%,在曝气量100 L h 1时两者达到最大,进一步增大曝气量,通量和截留率开始下降;当跨膜压差为0.1、0.3、0.5 MPa时,对应的最优曝气量分别为60、100、140 L h 1。并通过模型计算,分析了不同操作条件下,气升式纳滤装置流体力学性质和能耗的变化情况。

关键词(KeyWords)： 气升;纳滤;流体力学;能耗;杆菌肽

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(2009CB623403);; 江苏省高校自然科学基金(10K.JB530003);; 国家自然科学基金项目(21076102)

作者(Author): 石风强,景文珩,邢卫红

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