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| Performance Evaluation of a Screw Press for Extraction of Groundnut (Arachease hypogeal) Seeds and Cashew (Anarcardium Occidentale) Kernel |
Yusuf, K.A., Akhigbe, A. E., Izuagie, F. I.
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Abstract:
Mechanical extraction of oil from seeds using screw press has been proved to be efficient method of vegetable oil extraction. In this study, the performance evaluation of a screw press was carried out to the determine the effects of moisture content of the seed before pressing and the heating temperature of the sample during pressing on the extraction efficiency of the screw press using cashew kernels and groundnut seeds. The study was considered as a 4 factorial experiment with four levels of heating temperatures (80,90,100 and 1100C), three levels of moisture content (7,8,and 9%wb) and in three replications using a Randomized Complete Block Design (RCBD) with moisture content as a blocking factor. The results of the evaluation shows that extraction efficiency increases with increase in temperature but tends to decrease as the temperature increased beyond 1000C in both samples. Also, the higher the moisture content of cashew kernel, the higher the extraction efficiency. But in the case of groundnut seed, extraction efficiency of the screw press decreases with increase in moisture content. The optimum extraction efficiency of 82.00% (at 9% moisture content) and 81.53 % (at 7% moisture content) was obtained for cashew kernels and groundnut seeds extraction with a corresponding heating temperature of 1000C respectively.
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