Strategies to improve oil/lipid production of microalgae in outdoor cultivation using vertical tubular-type photobioreactors

被引:12
作者
Chen, Chun-Yen [1 ]
Yeh, Kuei-Ling [2 ]
Chang, Hsin-Yueh [2 ]
Chang, Jo-Shu [1 ,2 ,3 ]
机构
[1] Natl Cheng Kung Univ, Ctr Biosci & Biotechnol, Tainan 701, Taiwan
[2] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan
[3] Natl Cheng Kung Univ, Res Ctr Energy Technol & Strategy, Tainan 701, Taiwan
来源
INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014 | 2014年 / 61卷
关键词
Chlorella vulgaris; tubular-type PBR; microalgae; lipids; MASS CULTIVATION; STRAIN;
D O I
10.1016/j.egypro.2014.12.298
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The indoor laboratory-scale micro algae culture was elevated to 50 liter in outdoor photobioreactors for the cultivation of an oil-rich microalga, Chlorella vulgaris ESP-31. Under phototrophic and photoheterotrophic conditions using CO2 and acetic acid as carbon source, respectively, the lipid productivity and lipid content obtained were 30-31 mg/L/d and 35-44%, respectively. The effect of inoculum sizes on the performance of biomass and lipid production under phototrophic cultivation was also investigated. The lipid productivity of C. vulgaris ESP-31 was further improved to 47.6 mg/E/d when a higher inoculum size of 0.70 g/L was used. Finally, to avoid severe contamination problem during outdoor cultivation in the summer time, a two-stage lipid accumulation strategy was employed. The results show that the proposed two-stage process was able to avoid the bacterial contamination and enhanced the lipid content and lipid productivity of Chlorella vulgaris ESP-31. (C) 2014 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
引用
收藏
页码:2755 / 2758
页数:4
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