Kinetic modelling for flavanol extraction from red grape (Vitis vinifera L.) pomace using aqueous organic acid solutions


Citation

Katerina Tzima, . and Stamatina Kallithraka, . and Yorgos Kotseridis, . and Dimitris P. Makris, . Kinetic modelling for flavanol extraction from red grape (Vitis vinifera L.) pomace using aqueous organic acid solutions. pp. 1919-1924. ISSN 22317546

Abstract

Grape pomace is a food industry waste containing a high burden of antioxidant polyphenols and several methodologies have been developed for their efficient extraction. However a sustainable and environmentally friendly process should involve recovery means composed of benign non-toxic solvents. In this line this study examined the extraction of flavanols a particular class of functional polyphenols occurring in grape pomace using aqueous acetic acid and citric solutions. The aim was to assess the role of acid concentration in the extraction yield employing kinetics. The kinetic model established enabled the reliable comparison of the extraction efficiency of acetic acid and citric acid solutions as a function of acid concentration. The results showed that acetic acid solutions are more suitable for retrieving flavanols from grape pomace. Using a 4 (w/v) acetic acid solution a maximum total flavanol yield of 80 g catechin equivalents per g of dry pomace could be achieved.


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Abstract

Grape pomace is a food industry waste containing a high burden of antioxidant polyphenols and several methodologies have been developed for their efficient extraction. However a sustainable and environmentally friendly process should involve recovery means composed of benign non-toxic solvents. In this line this study examined the extraction of flavanols a particular class of functional polyphenols occurring in grape pomace using aqueous acetic acid and citric solutions. The aim was to assess the role of acid concentration in the extraction yield employing kinetics. The kinetic model established enabled the reliable comparison of the extraction efficiency of acetic acid and citric acid solutions as a function of acid concentration. The results showed that acetic acid solutions are more suitable for retrieving flavanols from grape pomace. Using a 4 (w/v) acetic acid solution a maximum total flavanol yield of 80 g catechin equivalents per g of dry pomace could be achieved.

Additional Metadata

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Item Type: Article
AGROVOC Term: Extraction
AGROVOC Term: Grapes
AGROVOC Term: Organic acids
AGROVOC Term: Vitis vinifera
AGROVOC Term: Winemaking
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:27
URI: http://webagris.upm.edu.my/id/eprint/21864

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