Kamchonemenukool Sudthida, Ho Chi-Tang, Boonnoun Panatpong, Li Shiming, Pan Min-Hsiung, Klangpetch Wannaporn, Weerawatanakorn Monthana
Department of Agro-Industry, Faculty of Agriculture, Natural Resources and Environment, Naresuan University, Phitsanulok 65000, Thailand.
Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901, USA.
Foods. 2022 Sep 20;11(19):2937. doi: 10.3390/foods11192937.
Extracting nutraceuticals with high value from bagasse, filter mud, and sugarcane leaves discarded as sugar mill by-products, is crucial for the development of a sustainable bio-economy. These by-products are important sources of policosanols and phytosterols, which have a cholesterol-lowering effect. This research focused on using a promising green technology, subcritical liquefied dimethyl ether extraction, with a low pressure of 0.8 MPa, to extract policosanols and phytosterols and on application of pretreatments to increase their contents. For direct extraction by subcritical liquefied dimethyl ether without sample pretreatment, the highest extraction yield (7.4%) and policosanol content were found in sugarcane leaves at 2888 mg/100 g, while the highest and lowest phytosterol contents were found in filter mud at 20,878.75 mg/100 g and sugarcane leaves at 10,147.75 mg/100 g, respectively. Pretreatment of filter mud by ultrasonication in hexane solution together with transesterification before the second subcritical liquefied dimethyl ether extraction successfully increased the policosanol content, with an extract purity of 60%, but failed to increase the phytosterol content.
从甘蔗渣、滤泥和甘蔗叶等作为制糖厂副产品而被丢弃的物质中提取高价值的营养保健品，对可持续生物经济的发展至关重要。这些副产品是具有降胆固醇作用的聚二十碳烯醇和植物甾醇的重要来源。本研究聚焦于采用一种有前景的绿色技术——0.8兆帕低压的亚临界液化二甲醚萃取法来提取聚二十碳烯醇和植物甾醇，并研究应用预处理方法来提高它们的含量。对于未经样品预处理而直接采用亚临界液化二甲醚进行萃取的情况，在甘蔗叶中获得了最高的萃取产率（7.4%）和聚二十碳烯醇含量，为2888毫克/100克，而最高和最低的植物甾醇含量分别出现在滤泥中，为20878.75毫克/100克，以及甘蔗叶中，为10147.75毫克/100克。在第二次亚临界液化二甲醚萃取之前，先将滤泥在己烷溶液中进行超声处理并同时进行酯交换反应，成功提高了聚二十碳烯醇的含量，提取物纯度达到60%，但未能提高植物甾醇的含量。
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