Lipids extraction from wet and unbroken microalgae chlorella vulgaris using subcritical water

Siti Zullaikah, P. Maria Christy Jessinia, Rinaldi, Medina Yasmin, M. Rachimoellah, Dawei Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Citations (Scopus)

Abstract

Lipids extraction from wet and unbroken microalgae (Chlorella vulgaris) using subcritical water with aid of co-solvents has been investigated. Lipids extraction from wet and unbroken microalgae has a crucial role in order to eliminate dewatering and drying steps. Subcritical water is able to extract lipids from feedstock with high water content. This work was conducted to study several factors affecting in subcritical water extraction (SWE) from wet and unbroken microalgae. In this study, effect of co-solvent types (without co-solvent, chloroform, methanol, ethanol, ethyl acetate, and n-hexane) under subcritical water (microalgae = 5g (dry weight), moisture content= 94.12%, T= 160oC, P = 80 bar, t= 30 min), extraction time (15 min, 30 min, 1 h, 3 h, and 5 h), and temperature (160o C, 180o C and 200o C) on yield of lipids were investigated orderly. Yield of lipids obtained without co-solvent (water polarity index = 10.2) and with co-solvents of methanol (PI=5.1), ethanol (PI=5.2), chloroform (PI=4.1), ethyl acetate (PI=4.4), and n-hexane (PI=0.1) were 38.73%, 26.47%, 26.12%, 51.93%, 53.40%, and 25.59%, respectively compared to the yield of lipids extracted using Bligh and Dyer method. Ethyl acetate is solvent with moderate PI, therefore can extract more lipids that is also have moderate polarity. Ethyl acetate shows a good performance to extract lipids from wet and unbroken microalgae because ethyl acetate can extract broader range of lipids including neutral and polar lipids. This study also found that increasing of extraction time and temperature to extract lipids in subcritical water condition can increase yield of lipids.

Original languageEnglish
Title of host publicationSeminar on Materials Science and Technology
EditorsLukman Noerochim
PublisherTrans Tech Publications Ltd
Pages103-108
Number of pages6
ISBN (Print)9783035714340
DOIs
Publication statusPublished - 2019
Event4th International Seminar on Science and Technology, ISST 2018 - Surabaya, Indonesia
Duration: 9 Aug 20189 Aug 2018

Publication series

NameMaterials Science Forum
Volume964 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference4th International Seminar on Science and Technology, ISST 2018
Country/TerritoryIndonesia
CitySurabaya
Period9/08/189/08/18

Keywords

  • Chlorella Vulgaris
  • Co-solvent
  • Subcritical Water
  • Yield of Lipids

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