Theoretical optimization of spiral-wound and capillary nanofiltration modules

W. G.J. Van Der Meer*, J. C. Van Dijk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

55 Citations (Scopus)


The performance of spiral-wound (SPW) and capillary nanofiltration (NF) modules can be improved by optimizing the module configuration and operating conditions. To this effect, two mathematical models for spiral wound and capillary modules have been developed. Both models are based on the homogeneous solution model and take into account concentration polarization, difference in rejection of mono- and bivalent ions, and the pressure drop in the feed and permeate channel. In this paper the influence of the operating conditions (feed pressure, feed flow) and the module configuration (spiral wound, capillary, feed channel height, permeate channel height, porosity, capillary diameter) on the performance of the modules are presented. Compared to the optimized spiral-wound module, a further increase in performance of 100% can be achieved by optimizing the configuration and operation conditions of a capillary module.

Original languageEnglish
Pages (from-to)129-146
Number of pages18
Issue number2-3
Publication statusPublished - 30 Nov 1997
Externally publishedYes


  • Capillary modules
  • Mathematical model
  • Nanofiltration
  • Optimization
  • Spiral-wound module


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