Effects of Algal Strains and Culture Media on Lipid Productivity in Green Microalgae, Genus <I>Chlorella</I>
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The effects of microalgae strains, culture media and interaction of microalgae strain and culture media were investigated on their specific growth rate, biomass yield, biomass productivity, lipid content and lipid productivity. Three strains of microalgae named 6-4, 208 and 209 were enriched in three different growth media (TAP, BG11 and N8 medium). The result showed that microalgae strain had statistically significant effect on lipid content and productivity. Microalgae strain 6-4 showed the highest lipid content 8.33% and lipid productivity 1.39 g/L/d. Culture media had significant effect on all parameter (specific growth rate, biomass, biomass productivity, lipid content and lipid productivity). TAP culture medium showed the highest specific growth rate, biomass yield and biomass productivity at 0.17 /d, 1.11 g/L and 0.12 g/L/d, respectively. However, the lipid content and lipid productivity from microalgae culturing by TAP and BG11 were not statistically significant difference. The interaction of microalgae strain and culture media were statistically significant effect on specific growth rate, lipid content and lipid productivity. Microalgae strain 6-4 culturing in TAP media showed the highest lipid content 10.55% and lipid productivity 1.76 g/L/d. Due to the fact that lipid productivity is a key factor for biofuel production therefore microalgae strain 6-4 culturing in TAP medium should be considered.
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