TY - JOUR
T1 - Photobioreactor strategies for improving the CO 2 fixation efficiency of indigenous Scenedesmus obliquus CNW-N
T2 - Statistical optimization of CO 2 feeding, illumination, and operation mode
AU - Ho, Shih Hsin
AU - Lu, Wei Bin
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- and NSC 99-3113-P-110-001- . The support obtained from the top university grant from National Cheng Kung University is also appreciated.
PY - 2012/2
Y1 - 2012/2
N2 - Statistical experimental design and bioreactor strategies were applied to enhance CO 2 fixation ability of microalga Scenedesmus obliquus CNW-N. Four operating parameters strongly influencing microalgal CO 2 fixation efficiency (namely, CO 2 concentration, CO 2 flow rate, magnesium concentration, and light intensity) were optimized with response surface methodology. The optimal range of parameters achieving the best overall performance of specific growth rate and CO 2 fixation rate was determined with overlay counter plot techniques. Optimal ranges of CO 2 concentration, CO 2 flow rate, magnesium concentration and light intensity were 2.0-2.5%, 0.3-0.5vvm, 1.7-2.7mM and 180-250μmolm -2s -1, respectively, achieving a specific growth rate of >1.22d -1 and CO 2 fixation rate of >800mgL -1d -1. Semi-batch operations further enhanced the biomass productivity, photosynthesis efficiency, and CO 2 fixation rate to 1030mgL -1d -1, 10.5%, and 1782mgL -1d -1, respectively. This performance is better than the results reported by most related studies.
AB - Statistical experimental design and bioreactor strategies were applied to enhance CO 2 fixation ability of microalga Scenedesmus obliquus CNW-N. Four operating parameters strongly influencing microalgal CO 2 fixation efficiency (namely, CO 2 concentration, CO 2 flow rate, magnesium concentration, and light intensity) were optimized with response surface methodology. The optimal range of parameters achieving the best overall performance of specific growth rate and CO 2 fixation rate was determined with overlay counter plot techniques. Optimal ranges of CO 2 concentration, CO 2 flow rate, magnesium concentration and light intensity were 2.0-2.5%, 0.3-0.5vvm, 1.7-2.7mM and 180-250μmolm -2s -1, respectively, achieving a specific growth rate of >1.22d -1 and CO 2 fixation rate of >800mgL -1d -1. Semi-batch operations further enhanced the biomass productivity, photosynthesis efficiency, and CO 2 fixation rate to 1030mgL -1d -1, 10.5%, and 1782mgL -1d -1, respectively. This performance is better than the results reported by most related studies.
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U2 - 10.1016/j.biortech.2011.11.091
DO - 10.1016/j.biortech.2011.11.091
M3 - Article
C2 - 22177736
AN - SCOPUS:84855249745
SN - 0960-8524
VL - 105
SP - 106
EP - 113
JO - Agricultural Wastes
JF - Agricultural Wastes
ER -
