CAREER: Aggregate-Enhanced Membrane Filtration

提案标题：CARADE：聚集体强化膜过滤提案编号：CTS-0449431首席研究员：阿尔伯特·金研究所：夏威夷大学这项研究是对微观流体动力学现象的基础研究，该研究使用斯托克斯式动力学来减少横流微滤和超滤中的胶体污染，这些微滤和超滤由预聚集和特定颗粒沉积增强。本项目的主要目标是利用给水中的颗粒聚集和膜表面的颗粒聚集来提高过滤性能。将对集料饼层和绒毛层的几何结构进行建模，并从模拟中估计比阻力。将发展和修改斯托克斯动力学，以模拟集料饼层的产生。该项目的一个主要目标是确定临界条件，即临界通量，低于该临界通量不会发生解体。该教育计划将侧重于培养国内学生的科学动机，这些学生大多是在美国出生的亚洲人和夏威夷原住民。他们将通过本科一级的新课程，以研究型教育为目的，向他们介绍该项目。拟议的课程活动将通过与研究相关的项目整合国内本科生和外国研究生，以促进合作。需要开发分子模型来捕捉溶液中和膜上聚集体的分子水平信息。了解膜表面聚集体的物理化学方面将提供防止这些现象的方法，从而提高膜的效率。因此，预计拟议的研究将对设计更有效的过滤系统产生重大影响。

Proposal Title: CAREER: Aggregate-enhanced Membrane FiltrationProposal Number: CTS-0449431Principal Investigator: Albert KimInstitution: University of HawaiiThis investigation is a fundamental study of micro-hydrodynamic scale phenomenausing Stokesian dynamics for reducing colloidal fouling in crossflow microfiltration and ultrafiltration enhanced by pre-aggregation and specific particle deposition. The main object of this project is enhancement of filtration performance using particle aggregation in feed water and on the membrane surface. Geometrical structure of the aggregate cake and fluff layer will be modeled and the specific resistances will be estimated from the simulations. Stokesian dynamics will be developed and modified to simulate the generation of the aggregate cake layer. A primary objective of this project is to determine the critical conditions, i.e., critical flux, below which no disintegration will happen. The educational plan will focus on cultivating scientific motivation of domestic students who are mostly American-born Asian and native Hawaiian students. They will be introduced to the project through new courses at the undergraduate level on the purpose of research-based education. The proposed course activities will integrate domestic undergraduate and foreign graduate students through research-related projects to foster collaborations. There is a need for developing molecular models that capture the molecular level information of aggregates both in solution and on membranes. Understanding the physico-chemical aspects of the aggregates on membrane surfaces will offer means of preventing these and thus improving the membrane efficacy. The proposed research is thus expected to have a significant impact on designing more efficient filtration systems.