微重力条件对小球藻固碳能力与油脂积累的影响

The effect of microgravity conditions on CO2 fixation and lipid production of Chlorella pyrenoidosa

为了提高微藻的固碳效率和产脂速率,在模拟的微重力条件下,利用CO2培养蛋白核小球藻。实验结果表明:微重力条件和CO2对蛋白核小球藻的生长具有协同促进作用;与普通条件下通入空气培养蛋白核小球藻相比,在微重力条件下通入浓度为10%的CO2培养蛋白核小球藻120 h后,蛋白核小球藻的生物量浓度提高了178%;在普通条件下,蛋白核小球藻的固碳效率为2.64±0.41 mg/(L·h),在微重力条件下,蛋白核小球藻的固碳效率为17.28±0.42 mg/(L·h);在普通条件下通入CO2后,蛋白核小球藻细胞中的不饱和脂肪酸含量升高,而在微重力条件下通入CO2后,蛋白核小球藻细胞中的不饱和脂肪酸含量会下降。

Microalgae carbon capture is one of the most promising methods in the realization of carbon emission reduction and carbon cycle.To enhance CO2 fixation and lipid production,Chlorella pyrenoidosa was cultured by CO2 under simulated microgravity condition.Compared with the microalgae cultured in air under general condition,the biomass concentration of Chlorella pyrenoidosa cultured with 10%CO2 aeration at 120 h under microgravity condition increased about 178%.The CO2 fixation rate was 2.64±0.41 mg/(L·h)in general condition,while that increased dramatically to 17.28±0.42 mg/(L·h)under microgravity condition.Moreover,the CO2 aeration increased unsaturated fatty acid content in algal cells under general condition,while unsaturated fatty acid content decreased under microgravity condition.