Green extraction of natural antioxidants from white grape waste using bio-renewable solvents and ultrasonic process intensification

Grape Pomace as a Renewable Natural Biosource of Value-Added Compounds with Potential Food Industrial Applications

“…Several researchers have reported the design and optimization of emerging extraction procedures, such as supercritical fluid extraction (SFE) [31,32], microwave-assisted extraction (MAE) [33][34][35], PLE [16,36], ultrasound-assisted extraction (UAE) [35,37], enzymatic extraction [38], among others, to maximize the yield of value-added compounds (e.g., phenolic compounds, anthocyanins, fibers, proteins) from grape pomace for various applications in food, agriculture, pharmaceuticals, and cosmetics [12,[39][40][41][42]. These emerging extraction techniques have been proposed for the recovery of phenolic compounds from grape pomace with the main objective of reducing extraction time, solvent volume, and cost, as well as increasing sustainability [30,43]. Solid-liquid extractions (e.g., PLE) use high temperatures and pressures and are considered a more efficient extraction procedure compared to solvent extraction and SFE, which use high solvent power and the distinctive physicochemical properties of supercritical fluids [16,30,44].…”