Walnut and almond oil screw-press extraction at industrial scale: Effects of process parameters on oil yield and quality

Authors

  • M. L. Martínez Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET) - Instituto de Ciencia y Tecnología de los Alimentos (ICTA). Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN) - Departamento de Química Industrial y Aplicada. Facultad de Ciencias Exactas. Físicas y Naturales (FCEFyN) - Universidad Nacional de Córdoba https://orcid.org/0000-0002-6236-7903
  • M. G. Bordón Instituto de Ciencia y Tecnología de los Alimentos (ICTA). Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN) - Instituto de Ciencia y Tecnología de los Alimentos Córdoba (ICYTAC–CONICET) - Universidad Nacional de Córdoba https://orcid.org/0000-0003-0249-7535
  • R. M. Bodoira Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET) - Instituto de Ciencia y Tecnología de los Alimentos (ICTA). Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN) - Universidad Nacional de Córdoba https://orcid.org/0000-0002-3808-7899
  • M. C. Penci Instituto de Ciencia y Tecnología de los Alimentos (ICTA). Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN) - Departamento de Química Industrial y Aplicada. Facultad de Ciencias Exactas. Físicas y Naturales (FCEFyN) - Instituto de Ciencia y Tecnología de los Alimentos Córdoba (ICYTAC–CONICET) - Universidad Nacional de Córdoba https://orcid.org/0000-0003-4953-4356
  • P. D. Ribotta Instituto de Ciencia y Tecnología de los Alimentos (ICTA). Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN) - Departamento de Química Industrial y Aplicada. Facultad de Ciencias Exactas. Físicas y Naturales (FCEFyN) - Instituto de Ciencia y Tecnología de los Alimentos Córdoba (ICYTAC–CONICET) - Universidad Nacional de Córdoba https://orcid.org/0000-0001-7883-8856
  • D. M. Maestri Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET) - Instituto de Ciencia y Tecnología de los Alimentos (ICTA). Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN) - Universidad Nacional de Córdoba https://orcid.org/0000-0002-1104-9323

DOI:

https://doi.org/10.3989/gya.0554171

Keywords:

Almond oil, Chemical quality parameters, Oil recovery, Screw-press extraction, Walnut oil

Abstract


Walnut and almond kernels are highly nutritious mainly due to their high oil contents. In this study, 32 factorial experimental designs were used to optimize processes for oil extraction by screw-pressing at industrial scale. Experimental designs included seed moisture content (SMC), and restriction die (RD) as the main processing parameters. Theoretical models were scanned against experimental data in order to optimize oil extraction conditions. The response variables analyzed were oil yield (OY), fine solid content (FC) in oil, and oil quality parameters. Fitted models for OY indicated maximum predicted values similar to the highest experimental values. Walnut oil extractions showed a maximum OY (84.5 ± 2.3 %) at 7.21% SMC, and 10 mm RD. For almond kernels, maximum OY (71.9 ± 3.5%) was obtained at 9.42% SMC, and 12 mm RD. Chemical quality parameters from both oils were in the ranges stated in Codex (FAO/WHO) standards for virgin (non-refined) oils.

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Published

2017-12-30

How to Cite

1.
Martínez ML, Bordón MG, Bodoira RM, Penci MC, Ribotta PD, Maestri DM. Walnut and almond oil screw-press extraction at industrial scale: Effects of process parameters on oil yield and quality. grasasaceites [Internet]. 2017Dec.30 [cited 2021Dec.5];68(4):e216. Available from: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1683

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