期刊
BIORESOURCE TECHNOLOGY
卷 131, 期 -, 页码 60-67出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.11.121
关键词
Chlorella sorokiniana; Algae; Heterotrophic; Heat-resistant; Lipid
资金
- Department of Energy [EE0003112]
To augment biomass and lipid productivities of heterotrophic cultured microalgae Chlorella sorokiniana, the influence of environmental temperature and medium factors, such as carbon source, nitrogen source, and their initial concentrations was investigated in this study. The microalga C. sorokiniana could tolerate up to 42 degrees C and showed the highest growth rate of 1.60 d(-1) at 37 degrees C. The maximum dry cell weight (DCW) and corresponding lipid concentration was obtained with 80 g L-1 of initial glucose and 4 g L-1 of initial KNO3 at 37 C. In 5-L batch fermentation, the DCW increased dramatically from 0.9 g L-1 to 37.6 g L-1 in the first 72 h cultivation, with the DCW productivity of 12.2 g L-1 d(-1). The maximum lipid content of 31.5% was achieved in 96 h and the lipid productivity was 2.9 g L-1 d(-1). The results showed C. sorokiniana could be a promising strain for biofuel production. (C) 2012 Elsevier Ltd. All rights reserved.
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