Effect of temperature and nitrogen concentration on the growth and lipid content of Botryococcus braunii and biodiesel production
Makaleler > Tam Makale · 2013
Yazarlar: Şafak Seyhaneyıldız Can, Edis KORU, SEMRA CİRİK
Elixir Bio Diversity, Diğer Kurumların Hakemli Dergileri, Uluslararası, Index Copernicus, 2013, cilt 59, ss 15581-15586
Özet
<p>The green microalga strain, Botryococcus braunii Kützing, was provided by the Culture Collection of Algae at the University of Texas (Austin, USA). The effects of nitrogen and temperature on growth and lipid production were studied for 18 days. Cultures of B. braunii were incubated in five different nitrogen concentrations: 1 g L-1 (group 1), 0.5 g L-1(group 2), 0.25 g L-1 (group 3), 0.125 g L-1(group 4) and free nitrogen (group 5). The highest biomass concentration (0.564±0.200 g L-1) and lipid content (33.31±0.014%) were obtained by cultivation with an initial nitrogen concentration of 0.50 g L-1 in these experiments. In free nitrogen, the maximum lipid content was 56.31±0.026% of dry weight, while the biomass concentration was 0.270±0.063 g L-1 at 20 °C. The density of the biodiesel obtained from B. braunii was calculated as 0.8263 kg.L-1, its viscosity as 4.97 mm2 .s -1 at 40 °C and its flash point as 109 °C. According to these results, nitrogen-starved Botryococcus braunii increased the production of lipids and could be made more suitable for biodiesel production. This study suggests that it is possible to utilize Botryococcus braunii for biodiesel production. <br></p>