Lipids extraction from wet Chlorella pyrenoidosa sludge using recycled [BMIM]Cl

Haitao Lu; Xinhai Yu; Hailong Li; Shan-Tung Tu; Schwede Sebastian

doi:10.1016/j.biortech.2019.121819

Lipids extraction from wet Chlorella pyrenoidosa sludge using recycled [BMIM]Cl

Bioresour Technol. 2019 Nov:291:121819. doi: 10.1016/j.biortech.2019.121819. Epub 2019 Jul 16.

Authors

Haitao Lu¹, Xinhai Yu², Hailong Li³, Shan-Tung Tu¹, Schwede Sebastian³

Affiliations

¹ Key Laboratory of Safety Science of Pressurized System (MOE), School of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, China.
² Key Laboratory of Safety Science of Pressurized System (MOE), School of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, China; State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address: yxhh@ecust.edu.cn.
³ School of Business Society and Technology, Mälardalen University, Västerås, Sweden.

PMID: 31369925
DOI: 10.1016/j.biortech.2019.121819

Abstract

In this study, experiments on pretreating one species of microalgae (Chlorella pyrenoidosa) using one kind of ionic liquid (IL) of [BMIM]Cl were conducted. The aim of this work is to evaluate the recycling efficacy of expensive IL solvent for effective cell disruption. It was indicated that the molecular structure of IL was stable during the recycling test. Five times antisolvent precipitation of microalgae debris after lipid extraction using methanol recovered 99.8% IL with the energy consumption of 4.46 MJ per kg dry Chlorella pyrenoidosa. The chromatography was used to separate IL and hydrolysates, resulting in the IL loss below 1.97 g per kg dry Chlorella pyrenoidosa.

Keywords: Energy consumption; Ionic liquid; Microalgae; Recycling; Wet extraction.

MeSH terms

Chlorella / chemistry*
Imidazoles / chemistry*
Lipids / isolation & purification*
Microalgae / chemistry*
Sewage*

Substances

Imidazoles
Lipids
Sewage
1-butyl-3-methylimidazolium chloride