Beneficial effect of corncob acid hydrolysate on the lipid production by oleaginous yeast Trichosporon dermatis.
In this work, corncob acid hydrolysate and its simulated medium whose sugar composition was the same as the corncob acid hydrolysate were used as fermentation substrate for lipid production by oleaginous yeast Trichosporon dermatis. On the corncob acid hydrolysate, after 7 days of fermentation, the biomass, lipid content, lipid yield, and lipid coefficient of T. dermatis were 17.3 g/L, 40.2%, 7.0 g/L, and 16.5%, respectively. Interestingly, during the lipid fermentation on the corncob acid hydrolysate, glucose, xylose, arabinose, and even acetic acid could be well utilized as carbon sources by T. dermatis. Surprisingly, the lipid yield (7.0 g/L) of T. dermatis on the corncob acid hydrolysate was much higher than that (3.8 g/L) on the simulated medium, in spite of the fact that the lipid coefficient (17.4%) on the simulated medium was a little higher. This phenomenon further showed that lignocellulosic acid hydrolysate was a suitable substrate for lipid fermentation by T. dermatis. This work would help the comprehensive utilization of lignocellulosic biomass for lipid production.
a College of Light Industry and Food Sciences , South China University of Technology , Guangzhou , P.R. China.
Lian
L
Xiong
Chao
C
Huang
Xiao-Yan
XY
Yang
Xiao-Qing
XQ
Lin
Xue-Fang
XF
Chen
Can
C
Wang
Bo
B
Wang
Xin-An
XA
Zeng
Xin-De
XD
Chen
D002241:Carbohydrates / Q000032:analysis; D002244:Carbon / Q000378:metabolism; D005285:Fermentation; D006868:Hydrolysis; D007218:Industrial Microbiology / Q000379:methods*; D008031:Lignin / Q000737:chemistry; D050356:Lipid Metabolism; D008055:Lipids / Q000032:analysis / Q000737:chemistry; D009584:Nitrogen / Q000378:metabolism; D014250:Trichosporon / Q000254:growth & development / Q000378:metabolism*; D003313:Zea mays
D002241:Carbohydrates; D008055:Lipids; C036909:lignocellulose; D002244:Carbon; D008031:Lignin; D009584:Nitrogen
Trichosporon dermatis; beneficial effect; biodiesel; corncob acid hydrolysate; microbial oil; simulated medium