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      Effective Antarctic krill oil extraction using switchable hydrophilicity solvents

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          Abstract

          Antarctic krill has been widely studied because of its abundant biomass, rich nutritional value, and great production potential. Notably, krill oil (KO) is rich in phospholipids (PLs), polyunsaturated fatty acids (PUFAs), and astaxanthin. A method based on a green switchable hydrophilicity solvent N,N-dimethylcyclohexylamine (DMCHA), which can reversibly change from oil soluble to water soluble in the presence of CO 2 was used to extract KO from frozen Antarctic krill as it consumes less energy than traditional methods. We showed that DMCHA destroyed the surface structure of Antarctic krill and accelerated the dissolution of KO. In addition, this method enabled the PL extraction to reach up to 80.2% of total PLs, among which PC accounted for the highest proportion, up to 90.91% in PL. In fact, the astaxanthin extraction reached up to 81.44% of total astaxanthin while the fatty acid (FA) extraction up to 84.35%. The KO extracted through DMCHA was rich in PUFA, up to 47.74%, and the content of EPA + DHA reached 42.16% of total FA content. Furthermore, the amount of residual solvent in the lipid phase was just 0.23% of the DMCHA used for the extraction and the recovery rate of solvent was up to 93.2%. Our results demonstrated the high effi ciency of oil extraction and the environmental friendliness of this method.

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          Author and article information

          Journal
          MLST
          Marine Life Science & Technology
          Springer (China )
          2096-6490
          2662-1746
          01 February 2020
          16 January 2020
          : 2
          : 1
          : 41-49
          Affiliations
          1College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
          2Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
          Author notes
          *Corresponding author: Xiaoming Jiang, E-mail: jxm@ 123456ouc.edu.cn
          Article
          s42995-019-00019-w
          10.1007/s42995-019-00019-w
          © 2020 Ocean University of China
          Product
          Self URI (journal-page): https://www.springer.com/journal/42995
          Categories
          Research Paper

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