초록
<P><B>Abstract</B></P> <P>In order to produce microalgal lipids that can be transformed to biodiesel fuel, one isolate with high lipid content was identified as <I>Chlorella</I> sp. Y8-1. The growth and lipid productivity of an isolated microalga <I>Chlorella</I> sp. Y8-1 were investigated under different cultivation conditions, including autotrophic growth (CO<SUB>2</SUB>, with light), heterotrophic growth (sucrose, without light) and mixotrophic growth (organic carbon sources and CO<SUB>2</SUB>, with light). Mixotrophic <I>Chlorella</I> sp. Y8-1 showed higher lipid content (35.5±4.2%) and higher lipid productivity (0.01g/L/d) than <I>Chlorella</I> sp. Y8-1 cultivated under autotrophic and heterotrophic conditions on modified Walne medium. Fatty acid analysis of <I>Chlorella</I> sp. Y8-1 showed the major presence of palmitic acid (C16:0), oleic acid (C18:1), linoleic acid (C18:2) and linolenic acids (C18:3). The main fatty acid compositions of the <I>Chlorella</I> sp. Y8-1 are appropriate for biodiesel production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Reports a novel microalgal isolate <I>Chlorella</I> sp. Y8-1. </LI> <LI> The high lipid content was obtained under mixotrophic condition. </LI> <LI> Fatty acid compositions of microalgae Y8-1 are appropriate for biodiesel production. </LI> </UL> </P>