期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 185, 期 4, 页码 1100-1117出版社
HUMANA PRESS INC
DOI: 10.1007/s12010-018-2717-3
关键词
Isochrysis; Screening; Biofuel feedstock; Two-stage outdoor cultivation
资金
- Young Eastern Scholar Program at Shanghai Institutions of Higher Learning [QD2015047]
- National Youth Thousand Talents Program, National Natural Science Foundation of China [31501493]
- Special Project of Marine Renewable Energy from the State Oceanic Administration [SHME2011SW02]
Isochrysis is a genus of marine algae without cell wall and capable of accumulating lipids. In this study, the lipid production potential of Isochrysis was assessed by comparing 15 Isochrysis strains with respect to their growth rate, lipid production, and fatty acid profiles. Three best strains were selected (lipid productivity, 103.0 similar to 121.7 mg L-1 day(-1)) and their lipid-producing capacities were further examined under different controlled parameters, e.g., growth phase, medium nutrient, and light intensity in laboratory cultures. Furthermore, the three Isochrysis strains were monitored in outdoor panel photobioreactors with various initial cell densities and optical paths, and the strain CS177 demonstrated the superior potential for outdoor cultivation. A two-stage semi-continuous strategy for CS177 was subsequently developed, where high productivities of biomass (1.1 g L-1 day(-1)) and lipid (0.35 g L-1 day(-1)) were achieved. This is a comprehensive study to evaluate the lipid-producing capability of Isochrysis strains under both indoor and outdoor conditions. Results of the present work lay a solid foundation for the physiological and biochemical responses of Isochrysis to various conditions, shedding light on the future utilization of this cell wall-lacking marine alga for biofuel production.
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