期刊
BIORESOURCE TECHNOLOGY
卷 101, 期 11, 页码 3801-3807出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.12.136
关键词
Haematococcus pluvialis; Biodiesel; Neutral lipid; High light intensity; Nitrogen deprivation
资金
- Secretaria de Ciencia, Tecnologia e Innovacion Productiva (SeCyT) de la Republica Argentina, Estudio Exploratorio [E658/07PET29]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas de la Republica Argentina (CONICET) [PIP 112-200801-00234]
The lipid content and composition of Haematococcus pluvialis exposed to stress conditions were analyzed to assess the potential of this microalga as a biodiesel feedstock. The total lipid content of control cells was 15.61% dw, whereas that of cells exposed to continuous high light intensity with nitrogen-sufficient medium (A-stress condition) or under continuous high light intensity with nitrogen-deprivation medium (B-stress condition) was 34.85% dw and 32.99% dw, respectively. The fatty acid profile was similar under all conditions and indicated that the main components were palmitic, stearic, oleic, linoleic, linolenic and linolelaidic acids. The neutral lipid fraction increased about 2-fold under both stress conditions. The percentage of saturated fatty acids in the neutral lipid fraction was 30.36% and 29.62% in cultures grown under A-stress and B-stress, respectively, and 27.81% under control conditions. The monounsaturated fatty acid content was not significantly different in control and A-stress cultures (20.07% and 19.91%, respectively), but was 18.96% under B-stress. The content of polyunsaturated fatty acids was 47.23% under B-stress and 43.15% under A-stress. Growth-rate was higher under A-stress compared to B-stress. This is the first study of H. pluvialis that provides a detailed characterization of its lipid content in relation to bioenergy. The results indicate the potential of this microalga as a biodiesel feedstock; however, culture conditions still have to be improved in order to achieve an adequate energy balance in mass culture. (C) 2010 Elsevier Ltd. All rights reserved.
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