Palanisamy, Karthick Murugan and Bhuyar, Prakash and Mohd Hasbi, Ab. Rahim and Vadiveloo, Ashiwin and Al-Dhabi, Naif Abdullah and Govindan, Natanamurugaraj and Maniam, Gaanty Pragas (2023) Lipid enhancement in oleaginous nannochloropsis sp. under nitrate limitation for future bioenergy production. International Journal of Energy Research, 2023 (5412660). pp. 1-8. ISSN 0363-907X. (Published)
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11. Lipid Enhancement in Oleaginous Nannochloropsis sp. under.pdf Available under License Creative Commons Attribution. Download (1MB) | Preview |
Abstract
Microalgae possess high oil content, exhibit rapid growth rates and biomass productivity, and leave a minimal environmental footprint, making them highly attractive for biofuel applications. Consequently, this present study is aimed at evaluating the impact of nitrogen starvation on the marine microalgae Nannochloropsis sp. to enhance lipid accumulation. The microalga culture was grown under an irradiance of 120 μmol photon m-2 s-1, temperature °C, continuous air-CO2, and with different concentrations of sodium nitrites over a 14-day cultivation period. From the results, it was found that the growth of the strain decreased under limited nitrogen conditions. After harvesting, the cells in the supernatant were regenerated by cultivating in double concentration of media. The results showed that on the 12th day, the highest lipid content was achieved, reaching wt.% of the dry weight under nitrogen limitation. The composition of the obtained lipid consisted of 18.0 wt.% saturated fatty acids, 72.38 wt.% monounsaturated fatty acids, and 8.95 wt.% polyunsaturated fatty acids. The lipid composition was dominated by monounsaturated oleic acid ( wt.%), saturated palmitic acid ( wt.%), and polyunsaturated linoleic acid ( wt.%). The findings of this study demonstrated that limiting nitrogen availability enhanced lipid accumulation in Nannochloropsis sp. Despite experiencing inhibited growth, this microalga species shows great potential for the large-scale cultivation of lipids and essential fatty acids. These results contribute to understanding the relationship between nitrogen availability and lipid metabolism in microalgae, providing valuable insights for optimizing lipid production in the context of biofuel and biotechnology applications.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Biomass; Linoleic acid; Microalgae; Microorganisms; Monounsaturated fatty acids; Nitrogen; Palmitic acid; Polyunsaturated fatty acids; Saturated fatty acids |
| Subjects: | Q Science > Q Science (General) Q Science > QR Microbiology |
| Faculty/Division: | Faculty of Industrial Sciences And Technology Institute of Postgraduate Studies |
| Depositing User: | Dr. Gaanty Pragas Maniam |
| Date Deposited: | 21 Feb 2024 07:44 |
| Last Modified: | 21 Feb 2024 07:44 |
| URI: | http://umpir.ump.edu.my/id/eprint/40423 |
| Download Statistic: | View Download Statistics |
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