Abstract
Flaxseed oil, a rich source of dietary n−3 FA, is commonly obtained by cold pressing whole seed. Furthermore, flaxseed hulls are emerging as a valuable lignan-rich product for functional food use; therefore, the pressing characteristics of dehulled seed need to be understood. Screw press performance was measured for pressing of whole and dehulled flaxseed. When whole Omega flaxseed was pressed through a 6-mm choke, an inverse relationship between seed moisture content (6.1–11.6% range) and oil recovery (70.1–85.7%) was observed. However, peak oil recovery from pressing dehulled Omega flaxseed of 72.0% was found at 10.5% moisture content in the moisture content range of 7.7–11.2%. Although oil recovery from dehulled Omega flaxseed was lower than from whole Omega flaxseed, the weight of oil produced from dehulled Omega flaxseed per unit time was higher. The dependence of capacity on moisture content was less evident with the 6-mm choke than with the 8-mm choke. An inverse relationship between moisture content of whole flaxseed and oil and meal temperature was observed. The oil and meal temperatures from pressing dehulled flaxseed were significantly lower than those from whole flaxseed. Therefore, pressing dehulled flaxseed appears to offer advantages in organic flaxseed oil production.
Similar content being viewed by others
References
Simopoulos, A.P., Essential Fatty Acids in Health and Chronic Disease, Am. J. Clin. Nutr. 70:560–569 (1999).
Bhatty, R.S., Nutrient Composition of Whole Flaxseed and Flaxseed Meal, in Flaxseed in Human Nutrition, 1st edn., edited by S.C. Cunnane and L.U. Thompson, AOCS Press, Champaign, 1995, pp. 22–42.
Agricultural Marketing Service, USDA, National Organic Program Final Rule, Federal Register 65:80547–80684 (2000)
Panfilis, F.D., T.G. Toschi, and G. Lercker, Quality Control for Cold-Pressed Oils, inform 9:212–221 (1998).
Singh, J., and P.C. Bargale, Development of a Small Capacity Double Stage Compression Screw Press for Oil Expression, J. Food Eng. 43:75–82 (2000).
Jacobsen, L.A., and L.F. Backer, Recovery of Sunflower Oil with a Small Screw Expeller, Energy Agric. 5:199–209 (1986).
Fils, J.M., The Production of Oils, in Edible Oil Processing, edited by W. Hamm and R.J. Hamilton, Sheffield Academic Press, Sheffield, England, 2000, pp. 47–78.
Singh, J., and P.C. Bargale, Mechanical Expression of Oil from Linseed, J. Oilseeds Res. 7:106–110 (1990).
Wiesenborn, D., R. Doddapaneni, K. Tostenson, and N. Kangas, Cooking Indices to Predict Screw-Press Performance for Crambe Seed, J. Am. Oil Chem. Soc. 78:467–471 (2001).
Singh, K.K., D.P. Wiesenborn, K. Tostenson, and N. Kangas, Influence of Moisture Content and Cooking on Screw Pressing of Crambe Seed, 79:165–170 (2002).
Kurzer, M.S., J.L. Slavin, and H. Adlercreutz, Flaxseed, Lignans and Sex Hormones, in Flaxseed in Human Nutrition, edited by S.C. Cunnane and L.U. Thompson, AOCS Press, Champaign, 1995, pp. 136–144.
Committee on Animal Nutrition, Board on Agriculture, National Research Council, Nutrient Requirements of Fish, National Academy Press, Washington, DC, 1993, pp. 13–15.
VanElswyk, M.E., Comparison of n−3 Fatty Acid Sources in Laying Hen Rations for Improvement of Whole Egg Nutritional Quality: A Review, Br. J. Nutr. 78:S61-S69 (1997).
Official Methods and Recommended Practices of the American Oil Chemists’ Society, 5th edn., AOCS Press, Champaign 1998.
SAS/STAT User’s Guide, Version 6, 4th edn., SAS Institute, Cary, NC, 1990, Vol. 2.
Montgomery, D.C., Design and Analysis of Experiments, John Wiley & Sons, New York, 1997, pp. 506–512.
Dick, T.A., and X. Yang, Flaxseed in Arctic Charr and Rainbow Trout Nutrition, in Flaxseed in Human Nutrition, 1st edn., edited by S.C. Cunnane and L.U. Thompson, AOCS Press, Champaign, 1995, pp. 261–280.
Hoffmann, G., The Chemistry and Technology of Edible Oils and Fats and Their High-Fat Products, Academic Press, New York, 1989, pp. 63–68.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Zheng, Yl., Wiesenborn, D.P., Tostenson, K. et al. Screw pressing of whole and dehulled flaxseed for organic oil. J Amer Oil Chem Soc 80, 1039–1045 (2003). https://doi.org/10.1007/s11746-003-0817-7
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s11746-003-0817-7