As an important oilseed crop, peanuts have a high oil content and excellent oil yield, playing a vital role in edible oil production. They are particularly suitable for producing high-quality edible oils, and peanut oil, with its high oil content and nutritional value, has become a popular choice in the edible oil market. So, how exactly is peanut oil produced?
A complete peanut oil production line typically includes the following four main steps: pretreatment, pressing, filtration, and refining. In the pretreatment stage, the peanut raw material is first fed into a destoner to remove impurities such as stones, clods of earth, stems, and leaves, reducing the impurity content in the peanuts to below 1%, thus ensuring the quality of the subsequent oil and the safe operation of the equipment. Subsequently, the cleaned peanuts are sent to a peanut shelling machine to remove the shells and separate the peanut kernels. Since the red skin on the surface of the peanut kernels affects the color and flavor of the pressed oil, it is usually removed using a peanut skin removal machine to ensure the production of peanut oil with a light color and pure flavor. Next, the peeled peanuts are placed in a roaster for moderate steaming and roasting to denature the proteins and concentrate the oil, thereby improving oil extraction efficiency and enhancing the aroma.
After pretreatment, the peanuts are fed into a screw oil press for pressing. This production line uses a screw oil press that follows mainstream physical pressing technology, relying on mechanical pressure to directly extract the oil, thus better preserving the natural aroma of the peanuts. The crude oil obtained after pressing is first pre-filtered using a plate and frame filter press to remove some residual solid impurities, making the oil clearer.
The final step is refining. Since different regions have different standards and requirements for oil quality, customers can flexibly choose the appropriate refining process according to the specific needs of their target market.
