Microbial oil production from rice straw hydrolysate by Trichosporon fermentans

被引:282
作者
Huang, Chao [1 ]
Zong, Min-hua [1 ]
Wu, Hong [1 ]
Liu, Qiu-ping [1 ]
机构
[1] S China Univ Technol, Coll Light Ind & Food Sci, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China
关键词
Trichosporon fermentans; Microbial oil; Rice straw hydrolysate; Detoxification; Biodiesel; LIPID PRODUCTION; GROWTH; ACID;
D O I
10.1016/j.biortech.2009.04.022
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Microbial oil production from sulphuric acid treated rice straw hydrolysate (SARSH) by Trichosporon fermentans was performed for the first time. Fermentation of SARSH without detoxification gave a poor lipid yield of 1.7 g/l, which was much lower than the result with glucose or xylose as the single carbon source (13.6 g/l or 9.9 g/l). The detoxification pretreatment, including overliming, concentration, and adsorption by Amberlite XAD-4 improved the fermentability of SARSH significantly by removing the inhibitors in SARSH. A total biomass of 28.6 g/l with a lipid content of 40.1% (corresponding to a lipid yield of 11.5 g/l) could be achieved after cultivation of T. fermentans on the detoxified SARSH for 8 days. Moreover, besides SARSH, T. fermentans Could also utilize mannose, galactose, or cellobiose, in hydrolysates of other natural lignocellulosic materials as the single carbon source to grow and accumulate lipid with a high yield (at least 10.4 g/l). Hence, it is a promising strain for microbial oil production and thus biodiesel preparation from agro-industrial residues, especially lignocellulosic materials. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:4535 / 4538
页数:4
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