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Light intensity as major factor to maximize biomass and lipid productivity of Ettlia sp in CO2-controlled photoautotrophic chemostat

Title
Light intensity as major factor to maximize biomass and lipid productivity of Ettlia sp in CO2-controlled photoautotrophic chemostat
Author
한명수
Keywords
Biomass productivity; Chemostat; CO2 supply; Dilution rate; Ettlia sp.; Light intensity; pH
Issue Date
2017-11
Publisher
ELSEVIER SCI LTD
Citation
BIORESOURCE TECHNOLOGY, v. 244, pt. 1, page. 621-628
Abstract
The optimal culture conditions are critical factors for high microalgal biomass and lipid productivity. To optimize the photoautotrophic culture conditions, combination of the pH (regulated by CO2 supply), dilution rate, and light intensity was systematically investigated for Ettlia sp. YC001 cultivation in a chemostat during 143 days. The biomass productivity increased with the increase in dilution rate and light intensity, but decreased with increasing pH. The average lipid content was 19.8% and statistically non-variable among the tested conditions. The highest biomass and lipid productivities were 1.48 g L-1 d(-1) and 291.4 mg L-1 d(-1) with a pH of 6.5, dilution rate of 0.78 d(-1), and light intensity of 1500 mu mol photons m(-2) s(-1). With a sufficient supply of CO2 and nutrients, the light intensity was the main determinant of the photosynthetic rate. Therefore, the surface-to-volume ratio of a photobioreactor should enable efficient light distribution to enhance microalgal growth.
URI
https://www.sciencedirect.com/science/article/pii/S0960852417313251?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/116266
ISSN
0960-8524; 1873-2976
DOI
10.1016/j.biortech.2017.08.020
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > LIFE SCIENCE(생명과학과) > Articles
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