Green Compressed Fluid Technologies To Extract Antioxidants and Lipids from Galdieria phlegrea in a Biorefinery Approach

Paola Imbimbo, Monica Bueno, Luigi D'Elia, Antonino Pollio, Elena Ibañez, Giuseppe Olivieri*, Daria Maria Monti

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

A green cascade approach was used to recover phycocyanins, carotenoids and lipids from Galdiera phlegrea. Phycocyanin extraction was performed by high pressure homogenization and purified by ultrafiltration, whereas carotenoids were obtained by a pressurized liquid extraction and lipids by supercritical fluid extraction. The second step of this innovative, green, and cost-effective procedure is able to improve the recovery of zeaxanthin and β-carotene up to 40%, without affecting the quality of compounds and avoiding the use of organic solvents and the drying processes. The isolated carotenoids were active as antioxidants, as clearly shown by their protective activity on a cell-based model. The lipid yield was increased by 12% with respect to conventional methods.

Original languageEnglish
Pages (from-to)2939-2947
Number of pages9
JournalACS Sustainable Chemistry and Engineering
Volume8
Issue number7
DOIs
Publication statusPublished - 24 Feb 2020

Keywords

  • biorefinery
  • carotenoids
  • compressed fluid technologies
  • Galdieria phlegrea
  • lipids
  • microalgae
  • phycocyanin

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