Modeling and optimization of laboratory-scale conditioning of Jatropha curcas L. seeds for oil expression
| Autor: | Helena Pereira, Jorge Gominho, Gonçalo Barradas, Suzana Ferreira-Dias, Joana Rodrigues, Manuel Vasconcelos, Isabel Miranda, Fernando Bianchi-de-Aguiar |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Pressing Yield (engineering) Materials science biology 020209 energy Extraction (chemistry) 02 engineering and technology Laboratory scale biology.organism_classification 01 natural sciences Horticulture 010608 biotechnology Botany 0202 electrical engineering electronic engineering information engineering Conditioning Response surface methodology Agronomy and Crop Science Softening Jatropha curcas |
| Zdroj: | Industrial Crops and Products. 83:614-619 |
| ISSN: | 0926-6690 |
| DOI: | 10.1016/j.indcrop.2015.12.062 |
| Popis: | The effect of conditioning of Jatropha curcas L. seeds on the yield of oil extracted by screw pressing was studied. A pressing test was performed with seeds without heating treatment and the extraction yield was 84.0%. Modelling dry conditioning of seeds and optimization of operation conditions were performed using Response Surface Methodology with a total of 11 dry conditioning experiments, following a central composite rotatable design as a function of temperature (52–108 °C) and time (8–92 min). An increase in the extraction yield occurred in all the experiments, with a maximum of 5.6% (w/w) increase, indicating the need to perform seed conditioning before mechanical extraction. The minimum oil contents in the press cakes, and therefore the highest extraction yields (c.a. 88%, w/w) were obtained with seeds treated at higher temperatures and shorter periods of time (e.g., 90 °C/10–20 min; 80 °C/30 min) or at lower temperatures and longer periods of time (e.g., 60 °C/50–60 min). Steam treatment at temperatures of 100, 110 and 120 °C resulted in seed softening and press clogging and no oil could be extracted. |
| Databáze: | OpenAIRE |
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