The effect of volatile fatty acids as a sole carbon source on lipid accumulation by Cryptococcus albidus for biodiesel production

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The use of volatile fatty acids (VFAs) for microbial lipid accumulation was investigated in flask cultures of Cryptococcus albidus. The optimum culture temperature and pH were 25 degrees C and pH 6.0, respectively, and the highest lipid content (27.8%) was obtained with ammonia chloride as a nitrogen source. The lipid yield coefficient on VFAs was 0.167 g/g of C. albidus with a VFAs (acetic, propionic, butyric acids) ratio of 8:1:1, which was in good agreement with a theoretically predicted lipid yield coefficient of the VFAs as a carbon source. The major fatty acids of the lipids accumulated by C. albidus were similar to those of soybean oil and jatropha oil. A preliminary cost analysis shows that VFAs-based biodiesel production is competitive with current palm and soybean based biodiesels. Further process development for lower aeration cost and higher lipid yield will make this process more economical. (C) 2010 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2011-02
Language
English
Article Type
Article
Keywords

YEAST YARROWIA-LIPOLYTICA; RHODOTORULA-GLUTINIS; DENSITY CULTIVATION; ACETIC-ACID; FERMENTATION; GLYCEROL; GROWTH; WASTE; MICROORGANISMS; CHLORELLA

Citation

BIORESOURCE TECHNOLOGY, v.102, no.3, pp.2695 - 2701

ISSN
0960-8524
DOI
10.1016/j.biortech.2010.10.141
URI
http://hdl.handle.net/10203/93598
Appears in Collection
CBE-Journal Papers(저널논문)
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