Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 19, Pages 4535-4538Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.04.022
Keywords
Trichosporon fermentans; Microbial oil; Rice straw hydrolysate; Detoxification; Biodiesel
Funding
- Guangdong Province Cooperation Project of Industry, Education and Academy [2008A010700006]
- Open Project Program of the State Key Laboratory of Pulp and Paper Engineering, South China University of Technology [200823]
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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.
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