High-pressure homogenization treatment to recover bioactive compounds from tomato peels. (December 2019)

• Record Type: Journal Article
• Authors: Jurić, Slaven; Ferrari, Giovanna; Velikov, Krassimir P.; Donsì, Francesco
• Is Part Of: Journal of food engineering. Volume 262(2019)
• Page Start: 170
• Page End: 180
• Publication Date: 2019-12
• Subjects: High-pressure homogenization -- Tomato peels -- Lycopene -- Bioactive compounds -- Agro-food by-products -- Natural functional ingredients; Food industry and trade -- Periodicals; Food -- Analysis -- Periodicals; Aliments -- Industrie et commerce -- Périodiques; Aliments -- Analyse -- Périodiques; Aliments -- Recherche -- Périodiques; 664.005
• DOI: 10.1016/j.jfoodeng.2019.06.011
• Languages: English
• ISSNs: 0260-8774

Abstract

Abstract: By-products of tomato processing are rich in bioactive compounds and their recovery might bring significant economic and environmental benefits. High-pressure homogenization (HPH) (1–10 passes at 100 MPa) was used as a disruption method to recover valuable compounds from tomato peels, using solely water as process medium. Micronization of tomato peels suspensions by HPH reduced their size distribution below the visual detection limit, because of the complete disruption of individual plant cells. With respect to high-shear mixing (5 min at 20000 rpm), HPH processing (10 passes) caused an increased release of intracellular compounds, such as proteins (+70.5%), and polyphenols (+32.2%) with a corresponding increase in antioxidant activity (+23.3%) and reduction in oil-water interfacial tension (−15.0%). Remarkably, also the release of water-insoluble lycopene in the aqueous supernatant increased, enabling the recovery of up to 56.1% of the initial peel content, well above what reported in the literature when using organic solvents or supercritical CO2 . Highlights: Tomato peel suspensions were treated in water by high-pressure homogenization (HPH). Water was used as a process medium, without the need for organic solvents. HPH caused the size reduction of tomato peels below the visual detection limit. HPH increased the release of intracellular compounds (protein, sugars, bioactives). 10 HPH passes extracted in water 56.1% of the total lycopene content of the peels.