Growth and lipid accumulation properties of a freshwater microalga Scenedesmus sp. under different cultivation temperature
2011
Xin, Li | Hong-ying, Hu | Yu-ping, Zhang
Microalgal lipid is a promising feedstock for biodiesel production. Effect of cultivation temperature on the growth and lipid accumulation properties of a freshwater microalga Scenedesmus sp. LX1 was studied. Scenedesmus sp. LX1 could grow in a wide range of temperature (10∼30°C), and the growth activation energy was 49.3kJ·mol⁻¹. The optimal temperature to produce microalgal biomass and lipid was 20°C, and after 15days of batch cultivation the productivities of 313.3g biomass·(gP)⁻¹, 112g lipid (gP)⁻¹ and 14.7g TAGs·(gP)⁻¹ were obtained. The content of polyunsaturated fatty acids decreased with the increase of cultivation temperature. The reactive oxygen species (ROS) levels at 10°C and 20°C were higher than that under higher temperature. For the first time the cultivation temperature, ROS level, specific growth rate and lipid content per microalgal biomass were correlated together.
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