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Lipid and citric acid production by wild yeasts grown in glycerol.
MedLine Citation:
PMID:  24473455     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In this study, crude glycerol was used as carbon source in the cultivation of wild yeasts aiming to the production of microbial lipids and citric acid. Forty yeasts of different sources were tested concerning their growth in crude and commercial glycerol. Four yeasts (Lidnera saturnus UFLA CES-Y677, Yarrowia lipolytica UFLA CM-Y9.4, Rhodotorula glutinis NCYC 2439, and Cryptococcus curvatus NCYC 476) were then selected due to their ability to grow in pure (OD600 2.133, 1.633, 2.055, and 2.049, respectively) and crude (OD600 2.354, 1.753, 2.316, and 2.281, respectively) glycerol (10, 20 and 30%). The yeastY. lipolytica UFLA CM-Y9.4 was selected due to its ability to maintain cell viability in concentrations of 30% of crude glycerol, and high glycerol intake (18.907 g/L). This yeast was submitted to lipid production in 30 g/L of crude glycerol, and therefore obtained 63.4% of microbial lipids. In the fatty acid profile, there was a predominance of stearic (C18:0) and palmitic (C16:0) acids in the concentrations of 87.64%, and 74.67%, respectively. We also performed the optimization of the parameters for the production of citric acid, which yielded a production of 0.19 g/L of citric acid in optimum conditions (38.4 g/L of crude glycerol, agitation of 184 rpm and temperature of 30°C),. Yarrowia lipolytica UFLA CM-Y9.4 presented good lipid production when in the concentration of 30 g/L of glycerol. These data may be used for production in large quantities for the application of industrial biodiesel.
Authors:
Karla Silva Teixeira Souza; Rosane Freitas Schwan; Disney Ribeiro Dias
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-1-29
Journal Detail:
Title:  Journal of microbiology and biotechnology     Volume:  -     ISSN:  1738-8872     ISO Abbreviation:  J. Microbiol. Biotechnol.     Publication Date:  2014 Jan 
Date Detail:
Created Date:  2014-1-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9431852     Medline TA:  J Microbiol Biotechnol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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