TY - JOUR
T1 - Effect of light intensity and nitrogen starvation on CO 2 fixation and lipid/carbohydrate production of an indigenous microalga Scenedesmus obliquus CNW-N
AU - Ho, Shih Hsin
AU - Chen, Chun Yen
AU - Chang, Jo Shu
N1 - Funding Information:
The authors gratefully acknowledge financial support from Taiwan’s National Science Council under grant numbers NSC 100-3113-E-006-016 , NSC 100-3113-E-006-017 , 101-3113-E-006-015, and NSC 99-3113-P-110-001 . The support from top university grant (or known as “5-year-50-billion” grant) of National Cheng Kung University is also appreciated.
PY - 2012/6
Y1 - 2012/6
N2 - Engineering strategies were applied to improve the CO 2 fixation rate and carbohydrate/lipid production of a Scenedesmus obliquus CNW-N isolate. The light intensity that promotes cell growth, carbohydrate/lipid productivity, and CO 2 fixation efficiency was identified. Nitrogen starvation was also employed to trigger the accumulation of lipid and carbohydrate. The highest productivity of biomass, lipid, and carbohydrate was 840.57mgL -1d -1, 140.35mgL -1d -1. The highest lipid and carbohydrate content was 22.4% (5-day N-starvation) and 46.65% (1-day N-starvation), respectively. The optimal CO 2 consumption rate was 1420.6mgL -1d -1. This performance is better than that reported in most other studies. Under nitrogen starvation, the microalgal lipid was mainly composed of C16/C18 fatty acid (around 90%), which is suitable for biodiesel synthesis. The carbohydrate present in the biomass was mainly glucose, accounting for 77-80% of total carbohydrates. This carbohydrate composition is also suitable for fermentative biofuels production (e.g., bioethanol and biobutanol).
AB - Engineering strategies were applied to improve the CO 2 fixation rate and carbohydrate/lipid production of a Scenedesmus obliquus CNW-N isolate. The light intensity that promotes cell growth, carbohydrate/lipid productivity, and CO 2 fixation efficiency was identified. Nitrogen starvation was also employed to trigger the accumulation of lipid and carbohydrate. The highest productivity of biomass, lipid, and carbohydrate was 840.57mgL -1d -1, 140.35mgL -1d -1. The highest lipid and carbohydrate content was 22.4% (5-day N-starvation) and 46.65% (1-day N-starvation), respectively. The optimal CO 2 consumption rate was 1420.6mgL -1d -1. This performance is better than that reported in most other studies. Under nitrogen starvation, the microalgal lipid was mainly composed of C16/C18 fatty acid (around 90%), which is suitable for biodiesel synthesis. The carbohydrate present in the biomass was mainly glucose, accounting for 77-80% of total carbohydrates. This carbohydrate composition is also suitable for fermentative biofuels production (e.g., bioethanol and biobutanol).
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U2 - 10.1016/j.biortech.2011.11.133
DO - 10.1016/j.biortech.2011.11.133
M3 - Article
C2 - 22209130
AN - SCOPUS:84860246501
SN - 0960-8524
VL - 113
SP - 244
EP - 252
JO - Bioresource technology
JF - Bioresource technology
ER -
