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Analysis of constant permeate flow filtration using dead-end hollow fiber membranes

机译:使用死角中空纤维膜进行恒定渗透流过滤的分析

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Dead-end filtration of colloids using hollow fibers has been analysed theoretically and experimentally, x mathematical model for constant flux filtration using dead-end hollow fiber membranes has been developed by combining the Poiseuille equation, the (standard) filtration equation, and cake filtration theory of Petsev, et al. [D.N. Petsev, Val Starov. I.B. Ivanov. Concentrated dispersions of charged colloidal particles: sedimentation. ultrafiltration and diffusion. Colloid Surf. A: Physicochem. Eng. Aspects. 81 (1993) 65-81.] to describe the time dependence of the filtration behavior of hollow fiber membranes experiencing particle deposition on their surface. Instead of using traditional constitutive equations, the resistance of the cake layer formed by the the deposited colloids has been directed correlated to the cake structure. This structure is determined by application of a force balance on a particle in the cake layer combined with the assumption that an electrostatically stable cake layer of mono-sized particles would be ordered in a regular packing geometry of minimum energy. The developed model has been used to identify the relationship between the filtration behavior the hollow fiber membrane and the particle properties, fiber size, and imposed average flux. Filtration experiments using polystyrene latex particles of relation narrow size distribution with a single dead-end hollow fiber membrane demonstrate good consistency between experimental results and model prediction, The developed model has been used to simulate the distribution of the cake resistance, transmembrane pressure, and flux along the hollow fiber membrane and used to assess the effect of fiber size, particle size, zeta potential. and the average imposed flux on the suction pressure-time profiles, flux. and cake resistance distributions. These results provide new insights into the filtration behavior of the hollow fiber membrane under constant flux conditions. (c) 2005 Elsevier B.V. All rights reserved.
机译:对中空纤维胶体的死角过滤进行了理论和实验分析,通过结合Poiseuille方程,(标准)过滤方程和滤饼过滤理论,开发了使用死角中空纤维膜进行恒定通量过滤的数学模型。 Petsev等人的文章。 [D.N.彼得塞夫(Vals Starov)。 I.B.伊万诺夫带电胶体颗粒的浓缩分散体:沉淀。超滤和扩散。胶体冲浪。答:物理化学。 。方面。 [J.Am.Chem.Soc.81(1993)65-81。]描述了中空纤维膜在其表面上经历颗粒沉积的过滤行为的时间依赖性。代替使用传统的本构方程,由沉积的胶体形成的滤饼层的电阻已经直接与滤饼结构相关。通过在饼层中的颗粒上施加力平衡并结合以下假设来确定此结构:假设将以最小能量的规则堆积几何形状订购单个尺寸颗粒的静电稳定饼层。已开发的模型已用于识别中空纤维膜的过滤行为与颗粒性质,纤维尺寸和施加的平均通量之间的关系。使用具有狭窄尺寸分布和单个死角中空纤维膜的窄分布关系的聚苯乙烯乳胶颗粒进行过滤实验,表明实验结果与模型预测之间具有良好的一致性,已开发的模型已用于模拟滤饼阻力,跨膜压力和通量的分布沿着中空纤维膜,并用来评估纤维尺寸,粒径,ζ电势的影响。以及在吸入压力-时间曲线上的平均施加通量,通量。和滤饼阻力分布。这些结果为中空纤维膜在恒定通量条件下的过滤行为提供了新的见解。 (c)2005 Elsevier B.V.保留所有权利。

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