Wheat oil production line

Production technology of wheat germ oil

　　 One, pressing method

　　The oil content of wheat germ is 7-9%, and 4-5% crude wheat germ oil can be extracted by pressing, and the yield of refined oil can be low. First, the processing cost is high and there is no competitive advantage, and secondly, there is a waste of resources in the processing of this method.

　　 2. Extraction method

　　1, carbon dioxide solvent supercritical extraction

　　This extraction method is low-temperature processing, which can extract wheat germ oil of better quality without solvent residue. However, the one-time investment in equipment is large, because the extraction is carried out under high pressure, and the volume of the extraction vessel is small (1000 liters), the production capacity is limited, and the cost is high.

　　2, atmospheric solvent (n-hexane or other liquid solvent) extraction

　　This kind of extraction method has high temperature during the processing, the nutrient content of the extracted wheat germ oil will be destroyed, and the solvent residue will be high.

　　3, low temperature extraction of n-butane

　　The whole production process of this method is carried out at low temperature, the nutritional components of wheat germ oil will not be damaged, and the yield is high, and the oil quality is good. The quality is comparable to that of carbon dioxide supercritical extraction.

　　 can form large-scale production, one-time fixed asset investment is small, low production cost, environmental protection and energy saving.

The wheat germ after the fat is taken is called defatted wheat germ, and the protein content reaches 29%. There is a certain market demand for flake products and milled products.
The main process parameters of wheat germ oil extraction equipment are:
　　 Moisture content of green sheet: about 10%
　　 Material dissolution ratio: 1:1~1:1.5
　　 Extraction pressure: ≤0.5MPa
　　Extraction temperature: 20℃~40℃
　　Countercurrent extraction times: 3 times
　　Meal residual oil: ≤0.7%
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