Modeling CaCO3 precipitation in fluidized bed CO2 stripping desalination process

Raviv Segev, David Hasson*, Raphael Semiat

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

High water recoveries can be achieved in brackish water RO desalination by air stripping of a carbonate-rich concentrate which induces high pH conditions leading to precipitation of the calcium hardness. Additional permeate can then be extracted from the RO concentrate stream after separating the precipitate. In our previous experimental study we have demonstrated the advantage of carrying out the CO2 air stripping process in a fluidized bed system. This paper presents a theoretical model enabling rigorous analysis of the experimental results and providing a framework for designing a fluidized bed CO2 air stripping system.

Original languageEnglish
Pages (from-to)192-197
Number of pages6
JournalDesalination
Volume311
DOIs
StatePublished - 5 Feb 2013
Externally publishedYes

Keywords

  • CO air stripping
  • CaCO precipitation rate
  • Fluidized bed reactor modeling
  • Mass transfer
  • Multi component system

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