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Optimization of Biomass and Oil Production of Scenedesmus obliquus Grown in Photobioreactor |
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| รหัสดีโอไอ | |
| Creator | 1. Farouk K. El-Baz 2. Sayeda M. Abdo |
| Title | Optimization of Biomass and Oil Production of Scenedesmus obliquus Grown in Photobioreactor |
| Contributor | - |
| Publisher | Thai Society of Higher Education Institutes on Environment |
| Publication Year | 2562 |
| Journal Title | EnvironmentAsia |
| Journal Vol. | 12 |
| Journal No. | 1 |
| Page no. | 1 - 9 |
| Keyword | Photobioreactor, Scenedesmus obliquus, Biomass, Dilution rate, Oil enhancement |
| URL Website | http://www.tshe.org/ea/index.html |
| Website title | EnvironmentAsia |
| ISSN | 1906-1714 |
| Abstract | The aim of this study was to grow Scenedesmus obliquus using vertical photobioreactor (PBR) and examine the oil production capacity of Scenedesmus obliquus grown under nitrogen repletion and starvation conditions. The volume of PBR was 4000 liters as a demo unit with the facility of computerized controlled system. Three dilution rates (0.125%, 0.18%, and 0.25%) were applied. The results showed that, the maximum biomass achieved with the highest dilution rate (0.25%) was 43.2 g /square meter day. This was detected when the dry weight was 2.1 g/L with consuming about 62.5 g/square meter/day of carbon dioxide. The maximum oil content reached to 26ฑ0.23 % after 29 days under nitrogen repletion conditions. However, under nitrogen starvation, the oil content was dramatically increased and reached to 41.9ฑ0.6% after 8 days. Fatty acids profile showed that, both saturated and unsaturated were detected. The major saturated fatty acids were palmitic (C:16:0) and stearic (C:18:0). The unsaturated fractions were detected as palmetoleic (C:16:1), oleic (C:18:1), linoleic (C:18:2) and linolenic acids (C:18:3). The fatty acids with four or more double ponds were not detected. Total saturated fatty acids represented 60.47% and 67.43% under nitrogen repletion and nitrogen starvation respectively. Therefore, nitrogen content not only affects oil content but also affects oil fractions. |
