EFFECT OF PRETREATMENT AND PRESSING METHOD ON OIL YIELD FROM SACHA INCHI SEEDS
DOI:
https://doi.org/10.15421/jchemtech.v33i2.322593Keywords:
Sacha inchi, fatty acids, oils, pressing power, screw speedAbstract
Sacha inchi seeds contain large amounts of oil and have many applications in food and medicine. The aim of this study was to evaluate the effectiveness of different pressing methods and their parameters on oil recovery efficiency. The results obtained using dehulled seeds pressed by conventional pressing method showed the highest efficiency of 78.35 ± 0.10 % at a pressing capacity of 20 kW and a screw speed of 42 rpm. In hot pressing of roasted seeds at 155 ± 5 °C, the efficiency was 79.37 ± 0.08 % at a pressing capacity of 21 kW and a screw speed of 44 rpm. When the seeds were treated with alkali and cold pressed, the highest oil recovery efficiency was 83.14 ± 0.22 % at a pressing capacity of 19.5 kW and a screw speed of 40 rpm. The oil obtained by all three methods contained saturated fatty acids (SFA), monounsaturated fatty acids (MUFA), and polyunsaturated fatty acids (PUFA), with the omega 3-6-9 fatty acid group accounting for 93.35 to 93.65 % of the total fatty acids, indicating the high quality of the oil. The cold pressing method combined with alkaline treatment provides the highest oil recovery efficiency and has the potential for industrial application compared to other pressing methods.
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