期刊
FOODS
卷 8, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/foods8120667
关键词
grape pomace; chemical composition; fatty acids; polyphenols; carbohydrates; lignin
资金
- USDA AFRI Foundational Program [2018-67021-27895]
- Virginia Agriculture Experiment Station
- Hatch Program of the National Institute of Food and Agriculture, USDA
To better evaluate potential uses for grape pomace (GP) waste, a comprehensive chemical composition analysis of GP in Virginia was conducted. Eight commercial white and red pomace samples (cv. Viognier, Vidal Blanc, Niagara, Petit Manseng, Petit Verdot, Merlot, Cabernet Franc, and Chambourcin) obtained from different wineries in Virginia, USA were used. For extractives, GPs contained 2.89%-4.66% titratable acids, 4.32%-6.60% ash, 4.62%-12.5% lipids with linoleic acid being the predominant (59.0%-70.9%) fatty acid, 10.4-64.8 g total phenolic content (gallic acid equivalents)/kg GP, 2.09-53.3 g glucose/kg GP, 3.79-52.9 g fructose/kg GP, and trace sucrose. As for non-extractives, GPs contained 25.2%-44.5% lignin, 8.04%-12.7% glucan, 4.42%-7.05% xylan, and trace amounts of galactan, arabinan, and mannan (less than 3% in total). Potential usages of these components were further examined to provide information on better valorization of GP. Considering the valuable extractives (e.g., polyphenols and oil) and non-extractives (e.g., lignin), designing a biorefinery process aiming at fully recover and/or utilize these components is of future significance.
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