Growth and lipid accumulation properties of a freshwater microalga Scenedesmus sp. under different cultivation temperature.
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 49.3 kJ·mol(-1). The optimal temperature to produce microalgal biomass and lipid was 20°C, and after 15 days of batch cultivation the productivities of 313.3 g biomass·(g P)(-1), 112 g lipid (g P)(-1) and 14.7 g TAGs·(g P)(-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.
State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing, China.
Xin
X
Li
Hong-ying
HY
Hu
Yu-ping
YP
Zhang
D000222:Adaptation, Physiological / Q000502:physiology; D049109:Cell Proliferation; D005618:Fresh Water / Q000382:microbiology*; D050356:Lipid Metabolism / Q000502:physiology*; D044444:Scenedesmus / Q000378:metabolism*; D013696:Temperature