TY - JOUR
T1 - Engineering strategies for improving the CO2 fixation and carbohydrate productivity of Scenedesmus obliquus CNW-N used for bioethanol fermentation
AU - Ho, Shih Hsin
AU - Kondo, Akihiko
AU - Hasunuma, Tomohisa
AU - Chang, Jo Shu
N1 - Funding Information:
The authors gratefully acknowledge financial support from Taiwan’s National Science Council (under grant number NSC 101-2221-E-006-094-MY3 , 102-3113-P-006-016 and 101-3113-P-110-003 ) and by the National Natural Science Foundation of China (Grant No.: 51136007 ). This research was also received funding from the Headquarters of University Advancement at the National Cheng Kung University, which is sponsored by the Ministry of Education, Taiwan.
PY - 2013/9
Y1 - 2013/9
N2 - Engineering strategies were applied to improve the cell growth, CO2 fixation ability, and carbohydrate productivity of a Scenedesmus obliquus CNW-N isolate. The resulting carbohydrate-rich microalgal biomass was subsequently utilized as feedstock for ethanol fermentation. The microalga was cultivated with 2.5% CO2 in a photobioreactor on different operation modes. Semi-batch operations with 50% replacement of culture medium resulted in the highest CO2 fixation rate (1546.7mg L-1d-1), carbohydrate productivity (467.6mg L-1d-1), and bioethanol yield (0.202g/g biomass). This performance is better than most reported values in the literature. The microalgal biomass can accumulate nearly 50% carbohydrates, as glucose accounted for nearly 80% of the total carbohydrate content. This glucose-predominant carbohydrate composition of the microalga is well suited for fermentative bioethanol production. Therefore, using the proposed carbohydrate-rich microalgal biomass both as the carbon sink and as the feedstock provides a feasible alternative to current carbon-reduction and bioethanol-production strategies.
AB - Engineering strategies were applied to improve the cell growth, CO2 fixation ability, and carbohydrate productivity of a Scenedesmus obliquus CNW-N isolate. The resulting carbohydrate-rich microalgal biomass was subsequently utilized as feedstock for ethanol fermentation. The microalga was cultivated with 2.5% CO2 in a photobioreactor on different operation modes. Semi-batch operations with 50% replacement of culture medium resulted in the highest CO2 fixation rate (1546.7mg L-1d-1), carbohydrate productivity (467.6mg L-1d-1), and bioethanol yield (0.202g/g biomass). This performance is better than most reported values in the literature. The microalgal biomass can accumulate nearly 50% carbohydrates, as glucose accounted for nearly 80% of the total carbohydrate content. This glucose-predominant carbohydrate composition of the microalga is well suited for fermentative bioethanol production. Therefore, using the proposed carbohydrate-rich microalgal biomass both as the carbon sink and as the feedstock provides a feasible alternative to current carbon-reduction and bioethanol-production strategies.
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U2 - 10.1016/j.biortech.2013.05.043
DO - 10.1016/j.biortech.2013.05.043
M3 - Article
C2 - 23792755
AN - SCOPUS:84879526915
SN - 0960-8524
VL - 143
SP - 163
EP - 171
JO - Bioresource technology
JF - Bioresource technology
ER -