Analysis of parameters affecting boron permeation through reverse osmosis membranes

Abraham Sagiv, Raphael Semiat*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

A numerical analysis tool for the estimation of boron reduction, in reverse osmosis (RO) desalination plants, was developed. The derived model enables proper variations of some controllable parameters for significant permeate boron reduction. These parameters are: temperature, applied pressure, permeate splitting along the membranes module and pH changes of the feed. Upon verification of the present model with existing data, parametric reduction of the permeate boron concentration was calculated. It was found that lowering the RO desalination temperature, increasing the applied pressure and/or increasing pH, result in reduction of the permeate boron concentration. The optimal permeate splitting was found to be around half of the module length. Effects of the above controllable parameters on membrane functions, in regard to other permeate variables, are also analyzed and discussed. It was shown that combining contributions of several parameters may yield significant permeate boron reduction to an extent of possible saving a second desalination stage or ion exchange. The present model provides a basis for cost analysis of the required change of the parameters to gain a significant reduction of the permeate boron concentration.

Original languageEnglish
Pages (from-to)79-87
Number of pages9
JournalJournal of Membrane Science
Volume243
Issue number1-2
DOIs
StatePublished - 1 Nov 2004
Externally publishedYes

Keywords

  • Boron
  • Permeation
  • Reverse osmosis

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