Journal
BIORESOURCE TECHNOLOGY
Volume 135, Issue -, Pages 622-629Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.08.068
Keywords
Sweetpotato vines; Enzymatic hydrolysate; T. fermentans; Single cell oils (SCOs); Wheat straw
Funding
- International Cooperation Project in Science and Technology of Zhejiang Province [2008C14038]
- Science and Technology Project of Zhejiang Province [2011C13016]
- National Natural Science Foundation of China [31070079]
- National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2012BAC17B04]
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The enzymatic hydrolysate of sweetpotato vines (SVH) characterized as an effective nutrients supplier with low nitrogen availability was firstly used as a substrate by Trichosporon fermentans for single cell oils (SCOs) production. Batch-fermentation experiments on various SVH based media suggested that co-fermentation of SVH and some high-sugar content substrates would be much more efficient and less-cost for SCOs production. A lipid yield of 9.6 gl(-1) with a lipid content of 35.6% was achieved on the SVH without any addition, while 27.6 and 17.7 gl(-1) lipid were respectively obtained on the fructose supplemented SVH media and the SVH mixed with acid treated wheat straw hydrolysate (WSH). The positive effect of SVH on the lipid production of T. fermentans was further demonstrated with a kinetic investigation revealing that SVH had a remarkable promoting effect on the biomass formation and the substrate uptake. (C) 2012 Elsevier Ltd. All rights reserved.
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