营养条件对二形栅藻生长及生化组分的影响

The Effect of Nutrition Condition on the Growth and the Lipid Properties of Scenedesmus dimorphus

为了研究不同营养条件对二形栅藻生长及生化组分的影响,本研究设置了3种不同的培养条件(BG11、BG11+DW、DW)进行研究。结果表明:二形栅藻在两阶段法(BG11+DW)培养下的生物质产率、总碳水化合物和总脂含量均最高,分别达到了0.045 g/(L·d)、37.4μg/mL和305.0μg/mL。3种不同培养条件下二形栅藻的脂肪酸组成相似,以C16和C18脂肪酸为主,饱和脂肪酸和单不饱和脂肪酸含量均在80%以上,特别是在两阶段法培养下,其含量达到了90.73%,表明二形栅藻是生物柴油生产的合适原料。

In order to investigate the effect of different nutritional conditions on the growth and the lipid properties of Scenedesmus dimorphus, 3 kinds of cultivation conditions （BGil, BG11 ＋DW, DW） were used in this research. The results showed that the optimal status of biomass production rate, total carbohydrate and total lipids were achieved by 0.045 g/（L. d）, 37.4 μg/mL and 305.0 μg/mL under two-phase cultivation （BG11 ＋DW） of Scenedesmus dimorphus. Moreover, a similar fatty acid composition of Scenedesmus dimorphus was attained through 3 ways of cultivation, and there was a dominance of C 16/C 18 fatty acid groups （more than 80% ） which was composed of saturated and monounsaturated fatty acid. Especially, under two-phase cultivation it would elevate to 90.73%. With these desirable lipid properties, Scenedesmus dimorphus would be highly suitable candidates for biodiesel production.