Abstract
A laboratory-scale oilseed screw press was used to investigate the effects of shaft speed and choke opening and of seed pretreatments, including moisture conditioning, flaking and preheating, on the canola pressing performance. Maximum pressure increased, and press throughput and residual oil (RO) in presscake both decreased, with a reduction in choke opening and with lowering of shaft speed. When either whole seed or flakes were preheated in the range 40–100C, the pressure and throughput increased, and RO decreased. Press throughput and oil output both achieved maxima at a 5.0% moisture content in seed, while the RO showed a continuous increase with increasing seed moisture contents. The observed effects of choke opening and shaft speed on pressure, throughput, RO and press temperature could be explained with the aid of a simple equation representing the axial flow within the press. The same equation also served to explain the changes in pressure and throughput corresponding to the various seed pretreatments, when changes in viscosity of the oilseed mass were postulated. It was inferred that any seed pretreatment which increased viscosity would also increase throughput of the press. A further examination of the individual components of viscosity might explain the changes in the residual oil content and facilitate the development of improved or novel pretreatments of oilseeds.
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References
Norris, F.A., inBailey's Industrial Oil and Fat Products Vol. I, 4th edn., edited by D. Swern, John Wiley and Sons, New York, 1981, pp. 175–246.
Beach, D., inHigh and Low Erucic Acid Rapeseed Oil edited by J.K.G. Kramer P.D. Sauer and W.J. Pigden, Academic Press, Canada, 1983, pp. 181–197.
Dunning, J.W.,J. Am. Oil. Chem. Soc. 33:462 (1956).
Stein, W.,Rev. Fr. Corps Gras 31:65 (1984).
Ward, J.A.,J. Am. Oil. Chem. Soc. 61:1358 (1984).
Simon-Rosedowns Ltd.,Turn Seed into Oil and Cattle Feed, advertising circular, Hull, England HU2 OAD, 1981.
Chuo Boeki Goshi Kaisha, CeCoCo Oil Expeller, advertising literature, ‘CECOCO’ Exhibition and Demonstration Farm Centre, Ibaraki City, Osaka-Fu, Japan (1981).
Prinsloo, M., and F.J.C. Hugo,Proc. 3rd Int. Conf. on Energy Use Management, edited by R.A. Fazzalore and C.B. Smith, Pergamon Press, Oxford, U.K., 1981, pp. 1775–1782.
Blake, J.A., inVegetable Oil Fuels, ASAE Pbl. No. 4-82, American Society of Agricultural Engineers, St. Joseph, Michigan, 1982, pp. 247–251.
Ramsey, R.W., and F.D. Harris, —Ibid. 1982, pp. 252–260.
Peterson, C.L., D.L. Auld and J.C., Thompson,Trans. Am. Soc. Agric. Eng. 26:1298 (1983).
Sivakumaran, K., J.M. Goodrum and R.A. Bradley, —Ibid 28:316 (1985).
Jacobsen, L.A., and L.F. Backer,Energy Agric., 5:199 (1986).
Vadke, V.S., F.W. Sosulski and C.A. Shook, J. Am. Oil Chem. Soc., in press.
Official Methods and Recommended Practices of the American Oil Chemists' Society, 3rd edn., edited by R.C. Walker AOCS, Champaign IL 1984. Method Ba 3–38
Anjou, K., inRapessed, edited by L.A. Applequist and R. Ohlson, Elsevier Publishing Co., New York, NY, 1972, pp. 198–217.
Wiegand, J.G., inProc. Fifth Int. Rapessed Conf., Vol. 2, Malmo, Sweden, 1978, pp. 314–333.
Harper, J.M.,Extrusion of Foods, Vol. I, CRC Press, Boca Raton, FL, 1981, pp. 47–91.
Frederickson, A.G., and R.B. Bird,Ind. Eng Chem. 50:347 (1958).
Yiu, S.H., I. Altosaar and R.G. Fulcher,Food Microstructure 2:165 (1983).
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Vadke, V.S., Sosulski, F.W. Mechanics of oil expression from canola. J Am Oil Chem Soc 65, 1169–1176 (1988). https://doi.org/10.1007/BF02660576
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DOI: https://doi.org/10.1007/BF02660576