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https://hdl.handle.net/20.500.14279/32893
Title: | Enhanced biomass and lipid production from olive processing wastewater using Scenedesmus obliquus in a two-stage cultivation strategy under salt stress | Authors: | Nicodemou, Andonia Konstantinou, Despoina Koutinas, Michalis |
Major Field of Science: | Engineering and Technology | Field Category: | Chemical Engineering | Keywords: | Lipids;Olive processing wastewater;Proline;Salt stress;Scenedesmus obliquus;Two-stage cultivation | Issue Date: | 1-May-2024 | Source: | Biochemical Engineering Journal, 2024, vol.205 | Volume: | 205 | Journal: | Biochemical Engineering Journal | Abstract: | The study enhanced Scenedesmus obliquus cultivation via optimization of C/N and C/P ratios in synthetic media and evaluation of a two-stage cultivation strategy through application of salinity stress in olive processing wastewater-based feedstocks. S. obliquus under 40/1 C/N ratio performed biomass and lipid productivity that reached 0.15 and 34.1 mg L−1 d−1 respectively, demonstrating high glucose removal efficiency. Application of a two-stage cultivation strategy employing 0, 10, 20 and 30 g L−1 NaCl during the second bioprocess segment resulted in elevated biomass productivity (0.14–0.19 g L−1 d−1), which was reduced under batch mode yielding 0.11 g L−1 d−1. Two-stage cultivation triggered higher lipid productivity (4.2%-156.9%) following 3 d and 6 d upon the onset of the second stage (42.7–55.2 mg L−1 d−1) as compared to batch conditions, while the utilization of reducing sugars in exhausted olive pomace hydrolysates and table olive processing wastewater reached 53.6%-61.2%. Proline, glycerol and reactive oxygen species accumulated at considerable levels employing 20 and 30 g L−1 NaCl, indicating that S. obliquus expressed cellular stress under elevated salinity content, which was not notably stimulated using 10 g L−1 NaCl. The use of olive processing wastewater in a two-stage cultivation strategy under stress conditions enables future development of algal biorefinery systems for production of S. obliquus biomass and polyunsaturated fatty acids as high added-value products from biowaste. | URI: | https://hdl.handle.net/20.500.14279/32893 | ISSN: | 1369703X | DOI: | 10.1016/j.bej.2024.109290 | Rights: | © 2024 Elsevier B.V. All rights reserved. | Type: | Article | Affiliation : | Cyprus University of Technology | Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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