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| Process optimization and quality comparison of black soldier fly larvae oils extracted by different methods |
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| KeyWord:black soldier fly larvae oil pressing leaching subcritical butane extraction quality comparison |
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| Abstract: |
| The black soldier fly (Hermetia illucens) larvae oils were respectively extracted from black soldier fly larvae by pressing method, leaching method and subcritical butane extraction method,and the single factor experiment and orthogonal experiment were conducted to optimize pressing method and leaching method,then the oil extraction rates, physicochemical properties and fatty acid compositions of black soldier fly larvae oils obtained by the three methods were compared. The results showed that the optimal pressing extraction conditions of black soldier fly larvae oil were obtained as follows: cooking temperature 140 ℃, cooking time 30 min and water content of larvae powder 5%. An extraction rate of 5410% of black soldier fly larvae oil was achieved under the optimal pressing extraction conditions. The optimal leaching extraction parameters of black soldier fly larvae oil were obtained as follows: leaching temperature 60 ℃,leaching time 5 h, solid -liquid ratio 1∶ 5. The extraction rate of black soldier fly larvae oil was 78.95% under the optimal leaching extraction conditions. The leaching extraction of black soldier fly larvae oil showed the highest oil extraction rate, followed by subcritical butane extraction method. The acid value and peroxide value of subcritical butane extracted oil was the lowest.The moisture content in the oil obtained by leaching method was the lowest, while it was the highest in pressed black soldier fly larvae oil. Extraction method had no effect on the fatty acid composition of black soldier fly larvae oil,and the oil had the highest content of lauric acid in saturated fatty acids, reaching 16%-20%, and high contents of linoleic acid and oleic acid in unsaturated fatty acids, reaching about 22% and 20% respectively. |
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