Light intensity and N/P nutrient affect the accumulation of lipid and unsaturated fatty acids by Chlorella sp. (September 2015)

• Record Type: Journal Article
• Authors: Guo, Xiaoyi; Su, Gaomin; Li, Zheng; Chang, Jingyu; Zeng, Xianhai; Sun, Yong; Lu, Yinghua; Lin, Lu
• Is Part Of: Bioresource technology. Volume 191(2015)
• Page Start: 385
• Page End: 390
• Publication Date: 2015-09
• Subjects: Light intensity -- Cultivation -- Lipid accumulation -- Unsaturated fatty acids; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.04.014
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: High lipid content was obtained in control medium under high light intensity. Lipid and UFA contents were observably enhanced by higher light intensity. N/P in mediums notably affected the lipid and UFA content. Abstract: In this study, different light intensities (80, 160, 240 and 320 μmol/m 2 s) and various mediums including control medium (CM), N/P rich medium (NPM), N rich medium (NM), and P rich medium (PM) were applied for cultivation of Chlorella sp. It was revealed that cultivation of Chlorella sp. in CM under the light intensity of 320 μmol/m 2 s led to a lipid content up to 30% enhancement, which was higher than the results of other cases. A rather high unsaturated fatty acid (UFA) content of 7.5% and unsaturated fatty acid/total fatty acid (UFA/TFA) ratio of 0.73 were obtained under 320 μmol/m 2 s in CM, indicating that the CM-320 system was applicable for the generation of UFA. Moreover, Chlorella sp. cultivated in PM under 320 μmol/m 2 s provided higher TFA content (7.3%), which was appropriate for biofuel production.