Effect of nitrogen deficiency and high salinity on intracellular lipid and calorific values of Chlorella pyrenoidosa in two-step cultivation system
Nitrogen deficiency and high salinity are able to induce intracellular lipid accumulation in some microalgae species. Nevertheless, low biomass and low growth rate of microalgae under these cultivation conditions are bottlenecks in the production of biodiesel from microalgae on a large scale. Two-step strategy was designed here in order to enhance the intracellular lipid content and at the same time to ensure high harvesting biomass of algae. The contributions of nitrogen deficiency and high salinity on biomass concentrations, lipid contents, total fatty acids and calorific values ofC. pyrenoidosa were investigated in two-step cultivation systems. The experiment results shows that in two-step cultivation systems, nitrogen deficiency cultivation condition can efficient improve biomass (22.2％) and lipid content (5.8％). Contrarily, biomass and lipid content in high salinity cultivation system (NaCl: 0.4 mol/L) decrease 25.5％ and 7.9％ respectively, which suggested that high salinity restricted the growth of algae greatly and was not suitable for C. pyrenoidosa to be applied in two-step cultivation system.
Nitrogen deficiency High salinity Two-step cultivation system Calorific values Lipid content
Guan-hua Huang Feng Chen
College of Light Industry and Food sciences,South China University of Technology,Guangzhou 510640,Ch School of Biological Sciences,The University of Hong Kong,Pokfulam,Hong Kong,China
国际会议
广州
英文
322-329
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）