Revalorization of Blueberry Residues: Phenolic Extraction Using Emerging and Conventional Technologies

Abstract

The blueberry juice industry generates residues after processing the fruit that could negatively impact the environment. However, blueberry by-products are rich in phenolic compounds, especially anthocyanins, which have shown positive health effects. Therefore, its revalorization for the formulation of functional ingredients becomes interesting. However, obtaining bioactive compounds from blueberry waste depends mainly on technology. Our bbjective is to discuss the effect of different conventional and emerging extraction technologies, such as ultrasound-assisted extraction, accelerated solvent extraction, and supercritical-CO₂ extraction, in obtaining polyphenolic compounds from blueberry residues. As result, both conventional and emerging methods effectively recover polyphenolic compounds from the blueberry residue (Vaccinium spp.). However, extraction with emerging methods has other advantages since they are considered friendly to the environment by consuming less energy and using suitable solvents for the food industry.