Energy analysis in the screw pressing of whole and dehulled
Jan 1, 2005We recently described a method for pressing dehulled flaxseed with 15% less oil recovery than from whole flaxseed, but with a doubling of oil production rate. Furthermore, the oil
Oct 1, 2003Screw 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
Screw pressing performance of whole and dehulled flaxseed
During screw pressing of whole and dehulled flaxseed in the oil expeller, the flaxseed oil and cake temperatures were measured by using a digital multi-thermometer (least count = 0.1 °C, range =
Oct 1, 2003Download Citation Screw Pressing of Whole and Dehulled Flaxseed for Organic Oil Flaxseed oil, a rich source of dietary n鈭? FA, is commonly obtained by cold pressing whole seed.
Screw pressing performance of whole and dehulled flaxseed
Screw pressing performance of whole and dehulled flaxseed at different seed moisture (6.4 to 11.1 % d.b.) and press head temperature (80-120 °C) was investigated. Oil recovery, residual oil, press
The first screw oil press was developed in 1900 by V.D. Anderson in the United States. the pressing of dehulled flaxseeds presents several advantages for the production of organic flaxseed oil. To analyze the necessary energy to
Europe PMCScrew pressing performance of whole and dehulled flaxseed
Screw pressing performance of whole and dehulled flaxseed at different seed moisture (6.4 to 11.1 % d.b.) and press head temperature (80-120 °C) was investigated. Oil
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
Energy analysis in the screw pressing of whole and dehulled
Jan 1, 2005Furthermore, the oil and meal temperatures from pressing dehulled flaxseed were an average of 20 °C lower than those from whole flaxseed (Zheng et al., 2003). Viscous dissipation
Jan 31, 2005In view of maximum oil recovery (82.9 % d.b.), lower FFA content, and oil and cake temperature, 7:3 ratio of dehulled and whole flaxseed having 6.4 % d.b. moisture content and 80
Screw pressing performance of whole and dehulled flaxseed
Screw pressing performance of whole and dehulled flaxseed at different seed moisture (6.4 to 11.1 % d.b.) and press head temperature (80-120 °C) was investigated.
Jun 30, 2005Screw-pressing embryo reduced oil yield compared to whole seed, but doubled productivity and sharply reduced frictional heating of the oil. Flaxseed hull and embryo, also
Characterization of oilseeds mechanical expression in an
The aim of this work was to investigate the evolution of continuous pressing parameters (internal pressure, temperature, oil content) inside of the screw press. For this purpose, a pilot
whole and dehulled flaxseed was determined by hot air oven method at 105 °C for the period until the constant weight reached (AOAC 2000) and reported in terms of dry basis (d.b.) throughout the
Screw pressing performance of whole and dehulled flaxseed
Screw pressing performance of whole and dehulled flaxseed at different seed moisture (6.4 to 11.1 % d.b.) and press head temperature (80-120 °C) was investigated. Oil recovery, residual oil, press
Screw pressing of whole and dehulled flaxseed for organic oil[J]. Journal of the American Oil Chemists' Society, 2003, 80(10): 1039~1045. DOI: 10.1007/s11746-003-0817-7
- Is dehulled flaxseed a convenient process?
- The oil yield obtained at dehulled flaxseeds pressing was lower than that obtained at the whole seeds pressing, but taking into account that the specific mechanical energy and the oil/cake temperature obtained from dehulled seeds is lower we can consider that pressing dehulled seeds is a convenient process.
- What happens if moisture content decreases in flaxseed?
- It was also observed that the decrease in moisture content resulted in significant increases in oil and cake temperature; also, the specific mechanical energy (SME) increased significantly from 81.1 to 104.7 kJ/kg when the moisture content of the whole flaxseeds decreases from 12.6% to 6.3%.
- What is the difference between screw pressing and solvent extraction?
- Screw pressing is used for oil recovery up to 90-95%, while solvent extraction is capable of extracting 99%. In spite of its slightly lower yield, screw pressing is the most popular oil extraction method as the process is simple, continues, flexible and safe, .
- Does speed of shaft screw press affect oil yield?
- For the studied range, oil yield increases with increase in speed of shaft screw press and in feeding rate. Oil yield is directly proportional to compressive stress while influence of speed is marginal, and also it is possible to predict a further increase in oil yield with an increase in compressive stress.
- When was the screw oil press invented?
- The first screw oil press was developed in 1900 by V.D. Anderson in the United States. This press allows continuous operation of hydraulic presses which resulted in greater capacities with smaller equipments and less labor, .
- What is a commercial oil extraction method?
- The term ”extraction” is also used for mechanical oil expression, . Mechanical pressing and solvent extraction are the most commonly used methods for commercial oil extraction. Screw pressing is used for oil recovery up to 90-95%, while solvent extraction is capable of extracting 99%.
