Hydroxytyrosol recovery from olive pomace: a simple process using olive mill industrial equipment and membrane technology

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Abstract

In this work, pilot-scale nanofiltration was used to obtain aqueous solutions rich in hydroxytyrosol and tyrosol from olive oil by-products. A large-scale simple process involving olive mill standard machinery (blender and decanter) was used for the olive pomace pre-treatment with water. The aqueous extract was then directly fed to a nanofiltration unit and concentrated by reverse osmosis. Final concentration factors ranged between 7 and 9 for hydroxytyrosol and between 4 and 7 for tyrosol. The final aqueous solution, obtained as retentate stream of reverse osmosis, was highly concentrated in hydroxytyrosol and tyrosol and their concentrations remained stable over at least 14 months.
Original languageEnglish
Pages (from-to)161-168
Number of pages8
JournalJournal of Food Science and Technology
Volume61
Issue number1
DOIs
Publication statusPublished - Jan 2024

Keywords

  • Hydroxytyrosol
  • Nanofiltration
  • Olive polyphenols
  • Olive pomace
  • Reverse osmosis
  • Tyrosol

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