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Effect of Salinity and Iron Stressed on Growth and Lipid Accumulation In Skeletonema costatum for Biodiesel Production

Author Affiliations

  • 1 Bioprocess Laboratory, Department of Chemical Engineering, Annamalai University, Annamalai nagar, TN-608 002, INDIA

Res.J.chem.sci., Volume 5, Issue (5), Pages 69-72, May,18 (2015)


High lipid content from selective algal species is the potential source of biodiesel production. Skeletonema costatum is the most attractive algae species for biodiesel production, with low lipid content. Therefore, research work is focused on increasing the lipid content and growth rate by varying the factors like salt and iron concentration which enhance the biodiesel production from Skeletonema costatum. The Skeletonema costatum was grown in Conways medium at constant pH and temperature of 7 and 24oC respectively for 12 days of incubation in a batch reactor. NaCl and ferrous sulphate were used as the salt and iron source respectively. Various concentrations of NaCl and ferrous sulphate were 0.1mM, 0.2mM, 0.3Mm, 0.4mM, 0.5mM and 10M, 20M, 30M, 40M, 50M respectively.30M FeSO.7HO and 0.4 mM NaCl resulted the highest growth rate of 0.25 d-1 and 0.32 d-1respectively. Also, maximum lipid content of 65.8 %CDW was found at 0.4mM of NaCl and 48.5%CDW was obtained with 30M of FeSO4.7H2O resulted. Thus, it can be concluded that the presence of NaCl and FeSO4.7H4O in the media increases the lipid content of Skeletonema costatum after 12 days of incubation, when comparing with the corresponding controls.


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