Obtaining Multiple Coproducts from Red Grape Pomace via Anthocyanin Extraction and Biogas Production,Journal of Agricultural and Food Chemistry

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Obtaining Multiple Coproducts from Red Grape Pomace via Anthocyanin Extraction and Biogas Production
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-07-03 00:00:00 , DOI: 10.1021/acs.jafc.8b02250
Brittany J. Allison ₁ , Christopher W. Simmons ₁

Affiliation

Red grape pomace (RGP), a byproduct of red wine production, is an abundant food processing waste stream in California, rich in both anthocyanins, a class of red-blue pigments, and lignocellulose. Extraction of anthocyanins and biofuel production from RGP have been investigated independently, but no research has examined employing both strategies together for maximal valorization. In this study, anthocyanins were most effectively extracted from RGP at 80 °C. Convection- and vacuum-oven drying of the pomace were found to decrease anthocyanin yield, whereas lyophilization did not significantly affect yield. Fermentable sugars were successfully separated from the crude extract via solid-phase extraction. Ionic liquid pretreatment of RGP was determined to be a nonviable option for application to anaerobic digestion. Extraction reduced biomethane output, but supplementation with the aqueous fraction of the extract mitigated much of this difference, indicating sequential extraction and fractionation of anthocyanins from RGP can minimize the impact on biofuel yields.

中文翻译：

通过花青素提取和沼气生产从红葡萄果渣中获得多种副产物

红葡萄果渣（RGP）是红酒生产的副产品，是加利福尼亚州丰富的食品加工废料流，富含花色素苷，一类红蓝色颜料和木质纤维素。从RGP中提取花青素和生产生物燃料的研究已经进行了独立研究，但尚无研究结合使用这两种策略来实现最大的增值。在这项研究中，在80°C下从RGP中最有效地提取了花青素。发现果渣的对流和真空烘箱干燥降低了花青素的产量，而冻干并没有显着影响产量。通过固相萃取成功地从粗提物中分离出了可发酵糖。RGP的离子液体预处理被确定为应用于厌氧消化的不可行选择。提取降低了生物甲烷的产量，

更新日期：2018-07-03

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