Enhancement effect of ethyl-2-methyl acetoacetate on triacylglycerols production by a freshwater microalga, Scenedesmus sp. LX1
2010
Xin, Li | Hong-ying, Hu | Jia, Yang | Yin-hu, Wu
Microalgae are very promising in biodiesel production. To reduce the production cost, approaches to enhance lipid and triacylglycerols (TAGs) production by microalgae have gained much attention. Effect of ethyl-2-methyl acetoacetate (EMA) on the lipid and TAGs production by a freshwater microalga, Scenedesmus sp. LX1, was studied in this paper. EMA below a concentration of 2mgL⁻¹ had no significant effect on microalgal biomass or lipid production. The biomass and lipid productivity were about 0.47gL⁻¹ and 139mgL⁻¹, respectively, and the lipid content per biomass was about 30% (w/w). Promisingly, comparing with the one without EMA treatment, under EMA concentrations of 1.0-2.0mgL⁻¹ the TAGs content per lipid (about 20% (w/w)) and TAGs productivity (about 23mgL⁻¹) were increased by 79% and 40%, respectively. Therefore, exposing algal cells with trace amount of EMA offers a viable method to enhance the TAGs production in Scenedesmus sp. LX1.
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