Ultrasound-assisted pressurized liquid extraction of anthocyanins from Aronia melanocarpa pomace

Thalles Allan Andrade, Fabiane Hamerski, Damian Estuardo López Fetzer, Maria Cinta Roda-Serrat, Marcos Lúcio Corazza, Birgir Norddahl, Massimiliano Errico*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This work aimed to investigate the optimum conditions of pressure, temperature, ultrasound intensity, solvent concentration and solvent flowrate of ultrasound-assisted pressurized liquid extraction of anthocyanins from Aronia melanocarpa pomace. The novel setup operates with an aqueous solution of citric acid as extraction solvent. The optimization was performed in order to maximize the total anthocyanins content extracted from the pomace. The optimized conditions of 70 °C, 180 bar, a solvent concentration of 1.5 % wt. citric acid, in a 200 W ultrasound bath were obtained. These conditions resulted in 88.0 % wt. extraction of anthocyanins in 45 min. A kinetic study was performed to study the influence of the temperature on the total anthocyanin yield obtained at the optimal extraction conditions.

Moreover, the component stability was assessed to prove that the system could successfully operate at 80 °C. Compared to classical batch extraction using the same solvent concentration and feedstock, the total anthocyanin content of the extract was increased by 19%.
Original languageEnglish
Article number119290
JournalSeparation and Purification Technology
Volume276
Number of pages10
ISSN1383-5866
DOIs
Publication statusPublished - 1. Dec 2021

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