There are various types of rapeseed oil sold on the market. According to the rapeseed oil processing technology, it can be divided into pressed rapeseed oil and extracted rapeseed oil. Physically pressed oil is more popular with consumers. Common first-level pressed rapeseed oil, strong aroma rapeseed oil, etc. They are all produced using the rapeseed oil pressing process.
The physical pressing process not only retains the flavor of the rapeseed itself and retains the nutrients in the rapeseed oil to the greatest extent, it can also remove the "green" smell in the rapeseed oil through subsequent processing. The oil has a unique smell, a rich fragrance and a good taste. Its smooth characteristics are deeply loved by consumers.
In the rapeseed oil production line, rapeseed needs to undergo pre-treatment such as cleaning, stone removal, and seed cooking before pressing. The seed cooking process before pressing is an important factor affecting the oil yield of rapeseed. After cooking, rapeseed has the following advantages:
1. It can destroy the cell structure, causing the oil inside to be distributed to the inner and outer surfaces of the billet, becoming visible free oil, and reducing the resistance to oil discharge.
2. It can fully denature the protein. After the protein is denatured, it is not easy to dissolve and become a solidified state. It can release highly dispersed fine oil droplets from the continuous colloidal phase. Simply put, it clears the oil path and facilitates outflow.
3. The viscosity of the oil is reduced during the frying process, which facilitates the accumulation and flow out of the oil. At the same time, the high temperature can also destroy the enzyme, which is also a kind of protein. When this substance is destroyed, the processed oil and cake will meal is easier to store.
4. Increase the plasticity of the blank, thereby increasing the pressure in the pressing chamber and increasing the amount of grease squeezed out.
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