Li Ying, Zhuang Xiaoci, Wu Xinrui, Qiu Chaoying, Wang Yong
Guangdong International Joint Research Center for Oilseeds Biorefinery, Nutrition and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China.
International College, Jinan University, Guangzhou 510632, China.
Foods. 2022 Jul 11;11(14):2047. doi: 10.3390/foods11142047.
is an ethnic woody oil plant, in which essential oil rather than oil has been the main foreign trade product through the decades. Concerning large amounts of residue generated from essential oil processing, a sustainable valorization pathway of these biowastes is proposed in this study. First, such biowastes have been systematically investigated for the first time regarding their oils extracted by three extraction methods, where ultrasound-assisted extraction (UAE) could significantly improve the extraction rate of traditional pressing and solvent extraction without any changes in oil quality. Moreover, the composition of acylglycerols and fatty acids in fruit, kernel, and peel oils were also first identified, which further proved that peels with abundant free fatty acids could lead to high acid value of fruit oils. Compared to virgin coconut oils, kernel oils have a more balanced fatty acid composition with a high lauric acid level, which could be applied as a promising lauric oil resource. Considering the high acid value in kernel oils, both decoloration using activated clay and alkali deacidification were attempted, where the combination of alkali deacidification and 10% of activated clay performed the best considering both quality and cost.
是一种木本油料植物，几十年来，其主要外贸产品一直是精油而非油脂。针对精油加工产生的大量残渣，本研究提出了这些生物废料的可持续增值途径。首先，首次系统研究了采用三种提取方法从这些生物废料中提取的油脂，其中超声辅助提取（UAE）可显著提高传统压榨和溶剂提取的提取率，且不改变油脂质量。此外，还首次鉴定了果实油、仁油和果皮油中甘油酯和脂肪酸的组成，进一步证明了富含游离脂肪酸的果皮会导致果实油的酸值较高。与初榨椰子油相比，仁油的脂肪酸组成更平衡，月桂酸含量高，可作为一种有前景的月桂油资源。考虑到仁油的酸值较高，尝试了用活性白土脱色和碱脱酸，综合质量和成本考虑，碱脱酸与10%活性白土的组合效果最佳。
