Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Quality Evaluation of Winery By-Products from Ionian Islands Grape Varieties in the Concept of Circular Bioeconomy

Version 1 : Received: 27 March 2021 / Approved: 29 March 2021 / Online: 29 March 2021 (12:18:34 CEST)

A peer-reviewed article of this Preprint also exists.

Xagoraris, M.; Oikonomou, I.; Daferera, D.; Kanakis, C.; Lappa, I.K.; Giotis, C.; Pappas, C.S.; Tarantilis, P.A.; Skotti, E. Quality Evaluation of Winery By-Products from Ionian Islands Grape Varieties in the Concept of Circular Bioeconomy. Sustainability 2021, 13, 5454. Xagoraris, M.; Oikonomou, I.; Daferera, D.; Kanakis, C.; Lappa, I.K.; Giotis, C.; Pappas, C.S.; Tarantilis, P.A.; Skotti, E. Quality Evaluation of Winery By-Products from Ionian Islands Grape Varieties in the Concept of Circular Bioeconomy. Sustainability 2021, 13, 5454.

Journal reference: Sustainability 2021, 13, 5454
DOI: 10.3390/su13105454

Abstract

The aim of this work was the study and evaluation of winery by-products in the framework of circular bioeconomy. Grape seeds and grape skins from Greek traditional Ionian Islands varieties were analyzed in an attempt to provide the appropriate basis for model development of their sustainable exploitation at a local or regional level. The wastes collected directly from the wineries immediately after the vinification process and analyzed by chromatographic and spectroscopic techniques. Also, annual production and yields were estimated. Grape seed oil quality was evaluated based on fatty acid methyl esters (FAMEs) composition. Grape skins phenolic fraction was extracted by an eco-friendly, non-toxic water-glycerol solvent system and were detected qualitatively. Also, total phenolic content (TPC) and antioxidant activity were measured. Based on estimated yields, our results demonstrate that winery by-products have the potential to promote the cyclical bioeconomy in a modern economic growth model that will reduce waste, and environmental costs as they can be reused as whole material in foods, dietary supplements, cosmetic ingredients, food colorants and preservatives.

Keywords

grape skins; grape seed oil; fatty acid methyl esters; total phenolic content; antioxidant activity; green extraction; circular bioeconomy

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