淡江大學機構典藏:Item 987654321/88217
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    题名: Tubular membrane filtration with a side stream and its intermittent backwash operation
    作者: Wu, Rome-Ming;Lin, Yu-Ju
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: backwash;CFD;filtration;membrane;side stream
    日期: 2012-08-07
    上传时间: 2013-04-13 20:50:50 (UTC+8)
    出版者: Philadelphia: Taylor & Francis Inc.
    摘要: The tubular membrane filtration system is widely applied to solid-liquid separation processes. Any improvements to the filtration module would increase separation efficiency, thus reducing operating costs. In this experiment, PMMA powder with an average particle diameter of 0.8 µm was filtered by a ceramic tubular membrane with an average pore size of 0.2 µm, and the impacts of the operating variables, such as suspension concentration, the filtration pressure, and the crossflow velocity on the permeate flux were discussed. In order to understand the increased permeate flux, the proposed module is comparable to the tubular membrane filtration module, but with an additional side stream under the same filtration mass flow rate. In addition, variations of shear force on the membrane surface are analyzed by CFD simulation, and the influence of backwash operations on the permeate flux is discussed. The results show that the side stream membrane filtration increased the shear force on the membrane surface, reduced fouling on the membrane surface, and increased the permeate flux. Furthermore, a backwash operation with a side stream flow channel could effectively clean the particles deposited in the module, thus, increasing the permeate flux.
    關聯: Separation Science and Technology 47(12), pp.1689-1697
    DOI: 10.1080/01496395.2012.659534
    显示于类别:[化學工程與材料工程學系暨研究所] 期刊論文

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