Supercritical CO2 extraction of lipids from grain sorghum dried distillers grains with solubles

Lijun Wang, Curtis L. Weller, Vicki L Schlegel, Timothy P Carr, Susan L. Cuppett

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Experiments were carried out on a lab supercritical CO2 extraction system to determine the effects of extraction conditions, including mass ratio of CO2 consumed to distillers dry grain with solubles (DDGS) extracted, extraction pressure, extraction temperature and time, on yield and composition of extracted lipids. A maximum lipid yield of 150 g/kg DDGS was achieved with a mass ratio ∼45, an extraction pressure at 27.5 MPa, an extraction temperature at 70 °C and an extraction time of 4 h. Under these extraction conditions, the contents of tocols, phytosterols, policosanols and free fatty acids were 0.44, 15.6, 31.2 and 155.3 mg/g in the extract. Experimental results indicated that shorter extraction time and higher flow rate of CO2 can achieve higher contents of tocols, phytosterols and policosanols but lower content of free fatty acids in the lipid extract. Extraction conditions had no observed effects on the composition of free fatty acids in the extract. Palmitic, oleic and linoleic acids were three main free fatty acids extracted and constituted about 94% of all free fatty acids.

Original languageEnglish (US)
Pages (from-to)1373-1382
Number of pages10
JournalBioresource Technology
Volume99
Issue number5
DOIs
StatePublished - Mar 1 2008

Fingerprint

Sorghum
distillers grains
grain sorghum
sorghum
Nonesterified Fatty Acids
policosanol
Lipids
lipid
lipids
Phytosterols
Fatty acids
free fatty acids
fatty acid
Palmitic Acids
Oleic Acids
Linoleic Acids
Pressure
Temperature
phytosterols
extracts

Keywords

  • DDGS
  • Nutraceuticals
  • Phytosterols
  • Policosanols
  • Supercritical CO extraction

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Food Science
  • Process Chemistry and Technology
  • Applied Microbiology and Biotechnology

Cite this

Supercritical CO2 extraction of lipids from grain sorghum dried distillers grains with solubles. / Wang, Lijun; Weller, Curtis L.; Schlegel, Vicki L; Carr, Timothy P; Cuppett, Susan L.

In: Bioresource Technology, Vol. 99, No. 5, 01.03.2008, p. 1373-1382.

Research output: Contribution to journalArticle

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