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Appl Microbiol Biotechnol. 2009 Aug;84(2):281-91. doi: 10.1007/s00253-009-1935-6. Epub 2009 Mar 28.

Microalga Scenedesmus obliquus as a potential source for biodiesel production.

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1
Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, 721302, West Bengal, India.

Abstract

Biodiesel from microalgae seems to be the only renewable biofuel that has the potential to completely replace the petroleum-derived transport fuels. Therefore, improving lipid content of microalgal strains could be a cost-effective second generation feedstock for biodiesel production. Lipid accumulation in Scenedesmus obliquus was studied under various culture conditions. The most significant increase in lipid reached 43% of dry cell weight (dcw), which was recorded under N-deficiency (against 12.7% under control condition). Under P-deficiency and thiosulphate supplementation the lipid content also increased up to 30% (dcw). Application of response surface methodology in combination with central composite rotary design (CCRD) resulted in a lipid yield of 61.3% (against 58.3% obtained experimentally) at 0.04, 0.03, and 1.0 g l(-1) of nitrate, phosphate, and sodium thiosulphate, respectively for time culture of 8 days. Scenedesmus cells pre-grown in glucose (1.5%)-supplemented N 11 medium when subjected to the above optimized condition, the lipid accumulation was boosted up to 2.16 g l(-1), the value approximately 40-fold higher with respect to the control condition. The presence of palmitate and oleate as the major constituents makes S. obliquus biomass a suitable feedstock for biodiesel production.

PMID:
19330327
DOI:
10.1007/s00253-009-1935-6
[Indexed for MEDLINE]

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