4.7 Article

Biofouling in spiral wound membrane systems: Three-dimensional CFD model based evaluation of experimental data

期刊

JOURNAL OF MEMBRANE SCIENCE
卷 346, 期 1, 页码 71-85

出版社

ELSEVIER
DOI: 10.1016/j.memsci.2009.09.025

关键词

Biofouling; 3D CFD model; Feed spacer channel pressure drop; Flux; Membrane; Nanofiltration; Reverse osmosis; NMR; MRI; NF; RO; Concentration polarization; Biofilm

资金

  1. Netherlands Organization for Scientific Research [864.06.003]
  2. Ministry of Economic Affairs

向作者/读者索取更多资源

A three-dimensional (3D) computational model describing fluid dynamics and biofouling of feed channels of spiral wound reverse osmosis and nanofiltration membrane systems was developed based on results from practice and experimental studies. In the model simulations the same feed spacer geometry as applied in practice and the experimental studies was used. The 3D mathematical model showed the same trends for (i) feed channel pressure drop, (ii) biomass accumulation, (iii) velocity distribution profile, resulting in regions of low and high liquid flow velocity also named channeling. The numerical model predicted a dominant biomass growth on the feed spacer, consistent with direct in situ observations on biofouling of spiral wound membrane modules and monitors using Magnetic Resonance Imaging (MRI). The model confirms experimental results that feed spacer fouling is more important than membrane fouling. The paper shows that mathematical modeling techniques have evolved to a stage that they can be used hand-in-hand with experiments to understand the processes involved in membrane fouling. (C) 2009 Elsevier B.V. All rights reserved.

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