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Lipid Extraction From Oleaginous Microorganism with Electrochemical Method.

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Zhang, Guan; Tyagi, Rajeshwar Dayal; Chen, Jiaxin; Li, Ji; Zhang, Xiaolei; Drogui, Patrick; Dong, Xiaoqing (2018). Lipid Extraction From Oleaginous Microorganism with Electrochemical Method. European Journal of Lipid Science and Technology , vol. 120 , nº 11. p. 1800215. DOI: 10.1002/ejlt.201800215.

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Résumé

In this study, electro‐treatment is used to disrupt the microbe cells for facilitating the lipid extraction from oleaginous yeast. Two types of the electrochemical assisted lipid extraction are performed. One is that an electrochemical method is used as pre‐treatment to break cells, and thereafter solvents (hexane, methanol, and mixture of chloroform:methanol) are used to dissolve the lipid, defined as electrochemical pre‐treatment followed extraction. The extraction efficiency reaches 43 and 92% in the electrochemical involved treatment with hexane and chloroform:methanol, respectively. In addition, simultaneous electrochemical treatment and lipid extraction is also conducted. In the process, the biomass dispersed in the solvents is subjected to the electrochemical treatment for extraction, defined as simultaneous electrochemical treatment and lipid extraction. The highest lipid extraction efficiency is 92.17% w/w dry biomass obtained at 48 h extraction time with chloroform:methanol:water as solvents. Electrochemical treatment shows great potential in lipid extraction as it somewhat reduces the toxic chloroform utilization. Increase of current of electro‐treatment leads to the increase of saturation degree of the biodiesel converted from lipid extracted with electro‐treatment. It is found that the current of electro‐treatment should be kept below 0.4 A in order to avoid the impact on biodiesel property. Practical applications: The study provides a way of lipid extraction from oleaginous microorganism with an electrochemical method. It has great potential to be utilized in lipid extraction from microorganisms.

Type de document: Article
Mots-clés libres: lipid extraction; wastewater sludge; electrochemical; biodiesel; oleaginous microorganism
Centre: Centre Eau Terre Environnement
Date de dépôt: 18 oct. 2018 19:20
Dernière modification: 26 sept. 2019 04:00
URI: http://espace.inrs.ca/id/eprint/7675

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