The winterization process is only intended for sunflower oil. This is because of the wax that penetrates the oil from seed hulls and causes higher turbidity (cloudiness) or a sediment at the bottom of the vessel. Winterization leads to a purer and tastier oil.
The basis of winterization is the cooling down of oil, which causes unwanted wax to crystallize. This process occurs in several steps: first, the oil is pumped into the initial crystallizer, equipped with a cooling system. Then the oil flows downstream into the second crystallizer, where crystal cores form. Afterwards, the oil flows further into the last crystallizer, where a cooling system maintains constant temperature, at which the remaining wax particles aggregate with the crystal cores. In the final phase of the process, the crystals that have formed are separated out on a horizontal filter. What flows through is pure, winterized oil; wax falls out in a discontinuous manner.
The company Farmet offers optional accessories that will satisfy even the most demanding customers. However, the most convenient solutions are usually our turnkey deliveries, which are optimized from both the technical and economic perspectives, meet all your requirements and include the automatization of the entire process.
Winterization removes wax, which crystallizes and sediments at lower temperatures. The highest wax content (up to 1,000 ppm) is found in oil pressed out of unhulled sunflower seeds. Using hulled seeds usually leads to oil with less than 200 ppm of wax. Winterization technology can be provided at capacities between 1 and 10 tons of oil per hour; wax content at output tends to be less than 20 ppm.