Peanut oil is a staple in many kitchens around the world, valued for its rich flavor and numerous health benefits. In this article, we will delve into the technical knowledge of high-efficiency oil extraction using advanced screw-type peanut oil presses and walk you through the entire process of peanut oil production from shelled peanuts to your dining table.
Before the oil extraction process begins, the first task is to remove the shells from the peanuts. This is crucial as it prepares the peanuts for subsequent processing. Modern peanut shelling machines can handle large quantities of peanuts efficiently, with a shelling rate of up to 98%. After shelling, the peanuts are ready for further treatment.
There are two main methods of extracting peanut oil: hot pressing and cold pressing. Hot pressing involves heating the peanuts before extraction. This method can achieve a higher oil yield, typically around 45 - 50%. The oil obtained through hot pressing has a stronger flavor and is more suitable for cooking at high temperatures. Cold pressing, on the other hand, is done at lower temperatures, usually below 60°C. This method preserves more of the natural nutrients in the oil, but the oil yield is relatively lower, about 38 - 42%. The choice between the two methods depends on the specific requirements of the production and the preferences of consumers.
Cleaning the peanuts thoroughly is an essential step in the production process. This helps to remove impurities such as dust, stones, and broken shells. After cleaning, the peanuts may undergo additional preprocessing steps, such as conditioning to adjust the moisture content. The ideal moisture content for peanuts before pressing is around 8 - 10%. This ensures optimal oil extraction efficiency and the quality of the final product.
Roasting plays a vital role in enhancing the flavor and oil yield of peanuts. The optimal roasting temperature for peanuts is between 130 - 150°C. At this temperature range, the peanuts develop a rich, nutty flavor, and the oil cells are broken down more easily during the pressing process. Roasting for about 20 - 30 minutes at the right temperature can significantly improve the oil extraction rate.
Crushing the peanuts into smaller particles before pressing can increase the contact area between the oil cells and the pressing mechanism, thus improving the oil yield. Studies have shown that when peanuts are crushed to a particle size of about 2 - 3 mm, the oil extraction rate can be increased by 3 - 5% compared to uncrushed peanuts.
The screw-type peanut oil press is the heart of the oil extraction process. It uses a rotating screw to apply pressure to the peanuts, squeezing out the oil. These presses are designed to operate at high efficiency, with an oil extraction rate of up to 95% of the available oil in the peanuts. The pressing process is continuous, allowing for large-scale production. For example, a medium-sized screw-type peanut oil press can process up to 500 kg of peanuts per hour.
After the oil is extracted, the remaining oil cake is not wasted. It can be used as animal feed, as it is rich in protein and other nutrients. In addition, the oil cake can also be further processed to extract more oil or used in the production of biofuels, making the production process more sustainable.
The crude peanut oil obtained from the pressing process needs to be refined to remove impurities and improve its quality. The refining process includes degumming, deacidification, decolorization, and deodorization. After refining, the peanut oil is ready for filling into bottles or containers. Strict quality control measures are in place during the filling process to ensure the safety and freshness of the oil.
Understanding the entire process of peanut oil production, from shelling to filling, can give consumers a better appreciation of the quality and safety of the product. By using advanced screw-type peanut oil presses and following strict production standards, our brand ensures that every bottle of peanut oil you purchase is of the highest quality. We invite you to choose our brand with confidence, knowing that you are getting a product that is produced with care and expertise. Enhance your trust in our brand and make the smart choice for your kitchen today!
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