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Abstract
Box-Behnken designs were used to optimize a process for sesame oil extraction by screw-pressing at low temperature (50 °C). Experimental designs included seed moisture content (SMC), pressing speed (PS), and restriction die (RD) as the main processing parameters. Extractions at pilot plant scale showed a peak in oil recovery (OR, 71.1 ± 2.80%) at 12.3% SMC, 4 mm RD, and 20 rpm PS. Theoretical models were scanned against experimental data in order to scale up the proposed oil extraction process to industrial scale. A fitted model for OR showed a maximum predicted value similar to the highest experimental value (74.4 ± 1.23%) under the following conditions: 8.03% SMC, 10 mm RD, and 20 rpm PS. Chemical quality parameters of oils obtained at both pilot and industrial scales were in the ranges stated in Codex (FAO/WHO) standards for non-refined sesame oil.
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1 Instituto Multidisciplinario de Biología Vegetal (IMBIV, CONICET), Universidad Nacional de Córdoba, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557); Universidad Nacional de Córdoba, Instituto de Ciencia y Tecnología de los Alimentos (ICTA), Facultad de Ciencias Exactas, Físicas y Naturales, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557); Universidad Nacional de Córdoba, Departamento de Química Industrial y Aplicada, Facultad de Ciencias Exactas, Físicas y Naturales, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557)
2 Universidad Nacional de Córdoba, Departamento de Química Industrial y Aplicada, Facultad de Ciencias Exactas, Físicas y Naturales, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557); Instituto de Ciencia y Tecnología de los Alimentos Córdoba (ICYTAC - CONICET) Universidad Nacional de Córdoba, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557)
3 Universidad Nacional de Córdoba, Departamento de Química Industrial y Aplicada, Facultad de Ciencias Exactas, Físicas y Naturales, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557)
4 Instituto de Ciencia y Tecnología de los Alimentos Córdoba (ICYTAC - CONICET) Universidad Nacional de Córdoba, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557)
5 Instituto Multidisciplinario de Biología Vegetal (IMBIV, CONICET), Universidad Nacional de Córdoba, Cordoba, Argentina (GRID:grid.10692.3c) (ISNI:0000 0001 0115 2557)