TABLE 1.

Different classes of compounds extracted from fruit by-products and their potential industrial application.

Fruit	Fruit by-product	Active principle	Extraction method	Reference	Industrial application	Reference
Grape	Grape marc, skin, pomace, seeds	Polyphenols	Supercritical fluid extraction; microwave extraction; ultrasound-assisted extraction; enzyme-aided extraction; pulsed electric fields processing; high voltage electrical discharges	Kelly et al., 2019	Food industry	Andrade et al., 2019
	Wine less	Polyphenols	Classical extraction with microwave and ultrasounds as pre-treatments	Romero-Díez et al., 2019	Pharmaceutic, cosmetic industry and biofuel production	Banerjee et al., 2017
	Grape marc	Pectins	Ultrasound-assisted extraction	Minjares-Fuentes et al., 2014
	Skin	Phenolic compounds	Natural deep eutectic solvents (NADES) ultrasonic extraction	Radosevic et al., 2016
	Pomace	Anthocyanins	Solid liquid extraction using ionic liquid solutions	Lima et al., 2017
	Grape marc	Monomeric anthocyanins, phenolic compounds	Pressurized liquid extraction	Pereira et al., 2019
	Seeds	Phenolic compounds, anthocyanins	Ultrasound-assisted extraction	Ghafoor et al., 2009
	Pomace	Phenolic compounds	Enzymatic extraction process	Meini et al., 2019	Beverage industry	Reissner et al., 2019
	Pomace	Anthocyanins	Enzymatic extraction process using brewery’s yeast biomass	Stafussa et al., 2016
	Winery grape waste	Cellulose, hemicelluloses and lignin	Enzymatic extraction process	Karpe et al., 2014
	Pomace, seeds, skins and stems	Phenolic compounds	High voltage electrical discharges	Boussetta et al., 2012
	Pomace	Pullulan	Submerged fermentation	Singh et al., 2019	Packaging materials	Singh et al., 2019
Coffee	Spent ground coffee	Phenolic compounds	High voltage electrical discharges	Boussetta et al., 2012	Fructooligosaccharides production	de la Rosa et al., 2019
Apple	Pomace	Phenolic compounds	Supercritical fluid extraction	Ferrentino et al., 2018	Production of microbial oils, application as biofuel	Liu et al., 2019
					Cosmetic industry	Barreira et al., 2019
					Bioethanol production	Evcan and Tari, 2015
Mango	Peels	Carotenoids, phenolics and flavonoids	Supercritical CO2 extraction followed by pressurized ethanol from the residue of the first stage	Garcia-Mendoza et al., 2015	Food and pharmaceutical industry	Ruiz-Montañez et al., 2014
	Peels	Phenolic compounds	Pulsed electric fields; high voltage electrical discharges	Parniakov et al., 2015
Orange	Peels	Essential oil, polyphenols and pectin	Ultrasound and microwave extraction	Boukroufa et al., 2015	Fructooligosaccharides production	de la Rosa et al., 2019
Orange	Peels	Ferulic acid	Solid liquid extraction using deep eutectic solvents	Ozturk et al., 2018