A comparison of harvesting and drying methodologies on fatty acids composition of the green microalga Scenedesmus obliquus
| Autor: | Roberto Bianchini Derner, Rafael Silva Menezes, Herculano Cella, Carlos Augusto Fernandes de Oliveira, Aline Terra Soares, Rafael Garcia Lopes, Thayna Lye Viegas, Nelson Roberto Antoniosi Filho |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Flocculation Biodiesel Renewable Energy Sustainability and the Environment 020209 energy food and beverages Biomass Forestry 02 engineering and technology complex mixtures chemistry Stationary phase Scenedesmus obliquus 0202 electrical engineering electronic engineering information engineering Raceway Fatty acid composition Food science Waste Management and Disposal Agronomy and Crop Science Polyunsaturated fatty acid |
| Zdroj: | Biomass and Bioenergy. 132:105437 |
| ISSN: | 0961-9534 |
| Popis: | Harvesting and drying processes are still obstacles in the microalgae production chain. In this study, a combination of different harvesting and drying methods for Scenedesmus obliquus was proposed. S. obliquus was cultivated in a pond raceway for 15 days until reaching stationary phase. The culture was separated by different harvesting methods (centrifugation and flocculation) and drying methods (freezing, freeze-drying and oven drying), each combination in triplicate. Flocculation did not influence FAME yield of S. obliquus, except when the biomass was dried in an oven. The biomass that was only frozen had the lowest FAME content due to the presence of reactive water in the biomass. In contrast, frozen biomass had higher content of saturated and monosaturated fatty acids; freeze-drying or oven drying caused an enrichment of the polyunsaturated fatty acids content. In conclusion, if the biomass will be used to extract polyunsaturated fatty acids, freeze-drying would be more appropriate. On the other hand, if the purpose of the biomass is to produce biodiesel, the best process would be to just freeze the biomass. |
| Databáze: | OpenAIRE |
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