Spacer geometry and particle deposition in spiral wound membrane feed channels
Spacer geometry and particle deposition in spiral wound membrane feed channels
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DOI：
10.1016/j.watres.2014.06.040
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发表时间：
2014-11-01
期刊：
影响因子：
12.8
通讯作者：
Picioreanu, C.
中科院分区：
文献类型：
--
作者：
Radu, A. I.;van Steen, M. S. H.;Picioreanu, C.
模拟细菌细胞的微球的沉积进行了实验研究，并与进料间隔膜通道中的数值模型，如用于螺旋缠绕纳滤（NF）和反渗透（RO）膜系统。在膜污染模拟器中的原位显微镜观察揭示了不同金刚石和梯形进料间隔物取向的特定颗粒沉积模式的形成。一个三维数值模型相结合的流体流动与拉格朗日方法的颗粒轨迹计算可以很好地描述在流动池中的颗粒沉积的原位观察。进料间隔器的几何形状、定位和横流速度敏感地影响颗粒的输送和沉积模式。沉积模式不受渗透生产。这种组合的实验建模方法可用于进料间隔器几何优化研究，以减少（生物）结垢。(C)2014爱思唯尔有限公司版权所有。
Deposition of microspheres mimicking bacterial cells was studied experimentally and with a numerical model in feed spacer membrane channels, as used in spiral wound nanofiltration (NF) and reverse osmosis (RO) membrane systems. In-situ microscopic observations in membrane fouling simulators revealed formation of specific particle deposition patterns for different diamond and ladder feed spacer orientations. A three-dimensional numerical model combining fluid flow with a Lagrangian approach for particle trajectory calculations could describe very well the in-situ observations on particle deposition in flow cells. Feed spacer geometry, positioning and cross-flow velocity sensitively influenced the particle transport and deposition patterns. The deposition patterns were not influenced by permeate production. This combined experimental-modeling approach could be used for feed spacer geometry optimization studies for reduced (bio)fouling. (C) 2014 Elsevier Ltd. All rights reserved.