An experimental investigation into the pre-treatment of synthetic membranes using sodium hydroxide solutions

Sarah A Jones, Michael R Bird, Arto Pihlajamaki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this paper the effect of two pre-treatment methods are compared experimentally for the filtration of (i) a spent sulphite liquor (17.8 wt.% dry solids) using a 20 kg mol-1 molar mass cut off (MMCO) fluoropolymer membrane and (ii) a molasses solution (45 Brix) using a polysulphone (Psf) membrane (1.5 m pore size). Both feeds are industrially relevant, and subject to severe fouling issues when membranes are used in their subsequent processing. The pre-treatment methods evaluated were: (i) conditioning with water at 60 C only [Protocol 1], and (ii) conditioning with water at 60 C followed by cleaning with 0.5 wt.% NaOH [Protocol 2]. Results are presented that confirm the benefits of sodium hydroxide preconditioning upon performance, supporting the suggestion by some membrane manufacturers that this step be included as part of the pre-treatment protocol.
Original languageEnglish
Pages (from-to)128-137
Number of pages10
JournalJournal of Food Engineering
Volume105
Issue number1
Early online date17 Feb 2011
DOIs
Publication statusPublished - Jul 2011

Keywords

  • zeta potential
  • membrane pre-treatment
  • molasses
  • spent sulphite liquor

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