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Green Extraction Methods and Microencapsulation Technologies of Phenolic Compounds From Grape Pomace: A Review

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Abstract  

Background

Grape pomace, the main winemaking by-product of the wine chain generated after the pressing of grapes in the production of white wine and/or after the fermentation stage in red winemaking. Grape pomace is rich in phenolic compounds, which possess several physiological effects, directly linked to their pharmacological, technological, antioxidant and antimicrobial properties. Here we address the most relevant techniques to extract and conserve phenolic compounds and reuse grape pomace.

Scope and approach

Specifically, in this review we discuss the importance of the extractive technologies applied to grape pomace that make up the principles of green chemistry such as supercritical fluid extraction (SFE), microwave-assisted extraction (MAE), microwave hydrodiffusion and gravity (MHG), ultrasound-assisted extraction (UAE), pulsed electric field (PEF), and ohmic heating (OH) for food industry as they are environmental-friendly processes more ecologic, economic and innovative. These techniques show benefits like reduction at the extraction time, number of unit operations, energy consumption, environmental impacts, economical costs, quantity of solvent and waste production, aiming to guarantee safe and quality extracts and/or products. Summed to the green extraction methods the microencapsulation technologies spray drying, spray cooling, lyophilization, extrusion, and coacervation can be applied to the obtained extracts to improve their shelf life, giving a wider and more sustainable use of them.

Key findings and conclusions

Therefore, here we address the importance of reusing and valuing grape pomace, as well as describing extractive technologies that make up the principles of green chemistry and show a wide range of alternatives for preserving these compounds, sensitive to heat, light and oxygen through microencapsulation techniques.

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Adapted from Labuschagne (2018)

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Adapted from Ozkan et al. (2019)

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Funding

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES).

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Correspondence to Karine Inês Bolson Moro.

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The authors declare that there is no conflict of interest.

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Moro, K.I.B., Bender, A.B.B., da Silva, L.P. et al. Green Extraction Methods and Microencapsulation Technologies of Phenolic Compounds From Grape Pomace: A Review. Food Bioprocess Technol 14, 1407–1431 (2021). https://doi.org/10.1007/s11947-021-02665-4

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  • DOI: https://doi.org/10.1007/s11947-021-02665-4

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