Development of an integrated process of membrane filtration for harvesting carotenoid-rich Dunaliella salina at laboratory and pilot scales
| Autor: | Carla Brazinha, Jorge Bernardo, Claudia F. Galinha, João G. Crespo, Joana Monte, Marta Sá, Carlos Casanovas, Luis Almeida Costa, Celina Parreira |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
biology Volumetric flux Filtration and Separation 02 engineering and technology Permeation 021001 nanoscience & nanotechnology Pulp and paper industry biology.organism_classification Analytical Chemistry Membrane 020401 chemical engineering chemistry Dunaliella salina Permeate flux Centrifugation Concentration factor 0204 chemical engineering 0210 nano-technology Carotenoid |
| Zdroj: | Separation and Purification Technology. 233:116021 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2019.116021 |
| Popis: | Dunaliella salina is an unicellular microalga, well-known for the production of carotenoids, especially β-carotene. This microalga is very fragile and shear sensitive due to the absence of a rigid cell wall and may easily rupture when shear stress conditions are applied. This work proposes to study the pre-concentration of carotenoid-rich (“orange”) Dunaliella salina culture by membrane filtration, preceding a final concentration using low-shear centrifugation. The goal is to minimise the total capital and energy costs, ensuring a low cell integrity loss and high permeate fluxes. The harvesting process was performed under controlled permeate flux conditions at laboratory and pilot scales. At pilot scale, the harvesting of Dunaliella salina attained a final concentration factor of 10, at a permeate volumetric flux of 21 L/(m2 h). When applying the two-step approach of membrane + centrifugation, the reduction of Total Cost of Ownership (TCO) and energy consumption were 70 and 76%, respectively, compared to harvesting with a one-step centrifugation approach. |
| Databáze: | OpenAIRE |
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