EXTRACTION OF LIPIDS FROM SPENT COFFEE GROUNDS USING ORGANIC SOLVENTS AND SUPERCRITICAL CARBON DIOXIDE
EXTRACTION OF LIPIDS FROM SPENT COFFEE GROUNDS USING ORGANIC SOLVENTS AND SUPERCRITICAL CARBON DIOXIDE
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DOI：
10.1111/j.1745-4549.2012.00757.x
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发表时间：
2013-10-01
影响因子：
2.5
通讯作者：
Sargolzaei, Javad
中科院分区：
文献类型：
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作者：
Ahangari, Behdad;Sargolzaei, Javad
本文以正己烷和石油苯为溶剂，采用索氏提取法、微波辐射法和超声波辐射法三种提取方法从咖啡渣中提取油脂。此外，在不同条件下使用CO2的超临界流体萃取（SFE）用于比较。不同有机溶剂提取方法的提取率存在显著差异。然而，当给定方法（例如，微波辐射）。另一方面，不同的提取条件从各种运行的超临界流体萃取导致显着不同的提取率，所有这些都高于那些使用有机溶剂的提取方法，除了索氏提取。用有机溶剂提取的油的脂肪酸组成没有观察到显着差异。然而，在不同条件下的超临界流体萃取的油的脂肪酸组成表明几种脂肪酸之间的显着差异。PRACTICAL APPLICATIONSSupercritical fluid extraction（SFE）可以作为一个绿色技术应用于废咖啡渣（SCGs）的油提取，作为咖啡工业的废弃物，在这项工作中证明。使用超临界二氧化碳萃取是一种可行的食品加工单元操作，并且没有监管障碍。相对于索氏提取，从SCGs中获得油的提取率为98.14%。这一趋势表明，SFE可以是从咖啡工业的废物中生产油的潜在候选者。
In this work, three extraction methods: Soxhlet, microwave irradiation and ultrasonic irradiation for extraction of lipids from spent coffee grounds were carried out using n-hexane and petroleum benzene as solvent. Also, supercritical fluid extraction (SFE) using CO2 under different conditions was used for comparison. Different methods of extraction with organic solvents showed significant differences in the extraction yields. However, no significant differences were found when a given method (e.g., microwave irradiation) was applied using different organic solvents. On the other hand, different extraction conditions from the various runs of SFE resulted in significantly different extraction yields, all of which were higher than those of the other extraction methods using organic solvents except the Soxhlet extraction. No significant differences were observed in the fatty acid compositions of the extracted oils using organic solvents. However, the fatty acid compositions of the oils extracted under different conditions of SFE indicated significant differences among several fatty acids.PRACTICAL APPLICATIONSSupercritical fluid extraction (SFE) can be applied as a green technology to the oil extraction of spent coffee grounds (SCGs), as a waste product of the coffee industry, demonstrated in this work. Extraction using supercritical carbon dioxide is a feasible food processing unit operation, and no regulatory hurdles. The extraction yield of oil from SCGs was obtained at 98.14% relative to the Soxhlet extraction. This trend demonstrates that SFE can be a potential candidate for oil production from the waste product of the coffee industry.