Adeeko, K.A. and Ajibola, O.O. (1990) Processing factors affecting yield and quality of mechanically expressed Groundnut oil. Journal of Agricultural Engineering Research, 45. pp. 31-43.
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Abstract
The effects of particle size, heating temperature, heating time, applied pressure, and duration of pressing on the yield and quality of mechanically expressed groundnut oil were investigated. Shelled groundnuts were manually cleaned and reduced to two particle sizes (finely and coarsely ground). The milled samples were then heated at 70 °, 90 °, 115 °, 135 °, and 160°C for 15, 25, 35 and 45 min. Pressures of 10, 15, 20 and 25 MPa were applied for 10 min during pressing. Generally, oil yields from coarsely ground groundnut were higher than those from finely ground samples, but the free fatty acid values were lower. Increasing the temperature did not improve the oil yield after 25 min of heating. Oil yield increased with pressures of up to 20 MPa beyond which the yield either levelled off or decreased. The rate of oil expression was increased by an increase in temperature, time of heating, and particle size. An increase in the heating temperature and time increased the free fatty acid, peroxide value, and the colour intensity of the oil expressed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Groundnut, yield,Quality, Mechanically, Groundnut oil |
| Author Affiliation: | Department of Agricultural Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria |
| Subjects: | Plant Production |
| Divisions: | Chickpea |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 28 Mar 2016 08:00 |
| Last Modified: | 28 Mar 2016 08:00 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/14242 |
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