Renewable microbial lipid production from Oleaginous Yeast: some surfactants greatly improved lipid production of Rhodosporidium toruloides.
Microbial oil is drawing increasing interest worldwide as an alternative non-food oil feedstock for biodiesel industry. Nowadays researchers have been increasingly focused on the improvement of microbial oil production process. Oleaginous yeast Rhodosporidium toruloides (R. toruloides) is considered an important candidate due to its excellent capabilities of lipid accumulation, broad adaptabilities to various carbon substrates, and the potential of co-production of some pigments. In present work, the individual effects of non-ionic, cationic, and anionic surfactant on cell growth and lipid accumulation of R. toruloides were investigated for the first time. Interesting results were noticed when some anionic surfactants were supplemented. The most significant effect was observed with addition of 0.2 % (w/v) sodium lignosulfonate, that biomass concentration, lipid concentration, and lipid yield was increased by 25.1, 44.9, and 15.7 %, respectively. The fatty acid compositions of R. toruloides lipids remained unchanged, which is similar to that of vegetable oils, and is considered potential feedstock for biodiesel preparation.
Key Laboratory of Forensic Science and Technology, Zhejiang Police College, 310053, Hangzhou, People's Republic of China. xujingyang.hz@gmail.com.|Department of Chemical Engineering, Institute of Applied Chemistry, Tsinghua University, 100084, Beijing, People's Republic of China. xujingyang.hz@gmail.com.
Jingyang
J
Xu
Department of Chemical Engineering, Institute of Applied Chemistry, Tsinghua University, 100084, Beijing, People's Republic of China.
Wei
W
Du
Department of Chemical Engineering, Institute of Applied Chemistry, Tsinghua University, 100084, Beijing, People's Republic of China.
Xuebing
X
Zhao
Department of Chemical Engineering, Institute of Applied Chemistry, Tsinghua University, 100084, Beijing, People's Republic of China.
Dehua
D
Liu
D001487:Basidiomycota / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism*; D018533:Biomass; D002244:Carbon / Q000378:metabolism; D005227:Fatty Acids / Q000378:metabolism; D005285:Fermentation; D008031:Lignin / Q000031:analogs & derivatives / Q000494:pharmacology; D050356:Lipid Metabolism / Q000187:drug effects; D008055:Lipids / Q000096:biosynthesis*; D010860:Pigments, Biological / Q000096:biosynthesis; D013501:Surface-Active Agents / Q000737:chemistry / Q000494:pharmacology*
D005227:Fatty Acids; D008055:Lipids; D010860:Pigments, Biological; D013501:Surface-Active Agents; D002244:Carbon; C001545:lignosulfuric acid; D008031:Lignin
Bioconversion; Biodiesel; Microbial oil; Surfactants; Yeast