Isolation of a novel strain of Monoraphidium sp. and characterization of its potential application as biodiesel feedstock

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• 作者：Xuya Yu ; Peng Zhao ; Cian He ; Junjun Li ; Xianhua Tang ; Junpei Zhou ; Zunxi Huang
• 关键词：Microalgae ; FXY-10 ; Monoraphidium sp. ; Biodiesel production
• 刊名：Bioresource Technology
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：121
• 期：Complete
• 页码：256-262
• 全文大小：367 K

文摘

A novel green microalgae strain from Lake Fuxian has been isolated and identified as a potential feedstock for biodiesel production. The novel strain was named Monoraphidium sp. FXY-10 based on its morphological and genomic characterization. The lipid productivities, fatty acid profiles, and microalgae recovery efficiency (¦Ç_a) of FXY-10 were investigated and compared under autotrophic and heterotrophic conditions. FXY-10 under autotrophic conditions exhibited a higher cellular lipid content (56.8 % ) than those under heterotrophic conditions (37.56 % ). However, FXY-10 growing under heterotrophic conditions exhibited more than 20-fold increase in lipid productivity compared with that under autotrophic conditions (148.74 mg L^?1 d^?1 versus 6.88 mg L^?1 d^?1). Moreover, higher saturated and monounsaturated fatty acids (77.5 % ) of FXY-10 was obtained under heterotrophic culture conditions, suggesting its potential as a biodiesel feedstock. Gravity sedimentation was proposed as the harvesting biomass method based on the 97.9 % microalgae recovery efficiency of heterotrophic cells after settling for 24 h.