Technique for evaluating silica scaling and its inhibition in reverse osmosis desalting

Raphael Semiat, Iris Sutzkover, David Hasson

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

The presence of silica in brackish water greatly complicates the reverse osmosis desalting process. Threshold limits of silica scale precipitation are difficult to predict as they are influenced by a large number of parameters. Another difficulty is the lack of a silica anti-scalant that can be confidently used to extend water recovery limits. Moreover, silica scales depositing on a membrane are difficult and costly to remove. The present paper describes the development of laboratory techniques for the determination of the permissible water recovery limits in desalting brackish waters containing silica and for evaluating the effectiveness of silica anti-scalants used to extend the water recovery limits. Procedures enabling meaningful interpretation of silica scaling data on the basis of fundamental principles are described and illustrated by results of preliminary experiments.

Original languageEnglish
JournalNACE - International Corrosion Conference Series
Volume2000-March
StatePublished - 2000
Externally publishedYes
EventCorrosion 2000 - Orlando, United States
Duration: 26 Mar 200031 Mar 2000

Keywords

  • Anti-scalant
  • Desalting
  • Inhibitors
  • Membranes
  • Reverse osmosis
  • Silica scale

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