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Ionic liquid‐assisted subcritical water promotes the extraction of lipids from wet microalgae Scenedesmus sp
Author(s) -
Chen Xiaolin,
Hu Linfeng,
Xing Ronge,
Liu Song,
Yu Huahua,
Qin Yukun,
Li Kecheng,
Li Rongfeng,
Li Pengcheng
Publication year - 2015
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.201400189
Subject(s) - ionic liquid , extraction (chemistry) , environmentally friendly , yield (engineering) , chemistry , scenedesmus , biomass (ecology) , chromatography , solvent , biodiesel , chemical engineering , materials science , organic chemistry , algae , botany , catalysis , biology , agronomy , ecology , metallurgy , engineering
Presently, microalgae are considered one of the most promising feedstocks. However, a large scale and efficient extraction method is costly to implement. Therefore, in this paper, we examine the use of an environmentally friendly solvent‐ionic liquid‐assisted subcritical water method to extract lipids from wet Scenedesmus sp. The extraction efficiency under various experimental conditions was evaluated. The optimal experimental parameters consisted of the ionic liquid species [HNEt 3 ][HSO 4 ], a 1% concentration of ionic liquid species‐ [HNEt 3 ][HSO 4 ], and a temperature of 110°C. The lipid yield under the optimal conditions (35.67% dried weight biomass) was close to that of the Bligh & Dyer method (35.32% dried weight biomass). However, the triacylglycerol content (73.63% total lipids) was higher than that of the Bligh & Dyer's method (60.44% total lipids). In addition, algae cell residues assembled into microspheres, therefore, they were easy to separate from the mixture. Practical applications: This method allows for easy and efficient extraction of lipids from wet microalgae, and it is environmentally friendly and easy to scale up. Therefore, it may prove beneficial for biodiesel production. A new, environmentally friendly method of extracting lipids from the wet Scenedesmus sp. is described, in which the effect of various experimental parameters including ionic liquid species, the concentration of ionic liquids, and temperature on the extraction efficiency were evaluated. By this method, lipids can be extracted from wet microalgae easily and efficiently. The lipid yield under the optimal conditions was close to the extraction result of Bligh & Dyer's method and the TAG concentration was higher than that of the Bligh & Dyer's method. Analysis of the fatty acid composition showed that the extracted lipids were a good source of crude oil for future biodiesel production.