Influence of pH, multivalent counter ions, and membrane fouling on phosphate retention during ceramic nanofiltration

F. C. Kramer, R. Shang, L. C. Rietveld, S.J.G. Heijman

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
38 Downloads (Pure)

Abstract

Ceramic nanofiltration is an emerging technology for the recovery of water and nutrients (including phosphate) from municipal sewage which becomes more imperative worldwide. In order to use ceramic nanofiltration for phosphate recovery from municipal sewage, more knowledge is needed. This is the first paper reporting the phosphate retention of ceramic nanofiltration membranes. Furthermore, the influence of pH, multivalent counter ions, and membrane fouling on phosphate retention is reported in this paper. Various experiments were executed to analyse the phosphate retention and zeta potential under varying conditions. During filtration of a salt solution including phosphate, the phosphate retention increased, from 76% to 99%, with a change in pH from 5 to 9. Furthermore, magnesium ions and organic fouling had a large influence on the phosphate retention: at pH 7 the phosphate retention dropped from 92% to 42–43% due to the presence of either magnesium ions or organic fouling.
Original languageEnglish
Article number115675
Number of pages7
JournalSeparation and Purification Technology
Volume227
DOIs
Publication statusPublished - 2019

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Ceramic nanofiltration
  • Phosphate rejection
  • Phosphate retention
  • Water treatment
  • Zeta potential

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