Journal article
Oil production by oleaginous yeasts using the hydrolysate from pretreatment of wheat straw with dilute sulfuric acid
Bioresource technology, Vol.102(10), pp.6134-6140
2011
Handle:
https://hdl.handle.net/2376/107151
PMID: 21463940
Abstract
This paper explores the use of the hydrolysate from the dilute sulfuric acid pretreatment of wheat straw for microbial oil production. The resulting hydrolysate was composed of pentoses (24.3
g/L) and hexoses (4.9
g/L), along with some other degradation products, such as acetic acid, furfural, and hydroxymethylfurfural (HMF). Five oleaginous yeast strains,
Cryptococcus curvatus,
Rhodotorula glutinis,
Rhodosporidium toruloides,
Lipomyces starkeyi, and
Yarrowia lipolytica, were evaluated by using this hydrolysate as substrates. The results showed that all of these strains could use the detoxified hydrolysate to produce lipids while except
R. toruloides non-detoxified hydrolysate could also be used for the growth of all of the selective yeast strains.
C. curvatus showed the highest lipid concentrations in medium on both the detoxified (4.2
g/L) and non-detoxified (5.8
g/L) hydrolysates. And the inhibitory effect studies on
C. curvatus indicated HMF had insignificant impacts at a concentration of up to 3
g/L while furfural inhibited cell growth and lipid content by 72.0% and 62.0% at 1
g/L, respectively. Our work demonstrates that lipid production is a promising alternative to utilize hemicellulosic sugars obtained during pretreatment of lignocellulosic materials.
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Details
- Title
- Oil production by oleaginous yeasts using the hydrolysate from pretreatment of wheat straw with dilute sulfuric acid
- Creators
- Xiaochen YuYubin ZhengKathleen M DorganShulin Chen
- Publication Details
- Bioresource technology, Vol.102(10), pp.6134-6140
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900547145601842
- Language
- English
- Resource Type
- Journal article