The technology of two-level cold pressing is convenient of oilseeds with oil content above 35 %. The most common examples are sunflower seed and rapeseed. The technology produces a high-quality, filtered oil as well as press cakes suitable for feed purposes.
The highest temperature reached in this process is 55°C, which meets the strictest requirements for cold pressing of oilseeds. The temperature of press cakes ranges between 60 and 80°C, the reduction of anti-nutritional substances is therefore only partial.
The expelled crude oil, still containing solid particles, flows into the settling tank, where sedimentation of the solids occurs. The sediment is then separated out by an integrated separator and returned back into the press for another round of pressing. The settling tank contains an integrated oil heating system, which, together with solids separation, guarantees a high efficiency of the filtration process.
The modular press shop Compact CP2 is offered at performances between 300 and 600 kg per hour.
The press shop Compact can be complemented with a range of accessories including seed pre-treatment, which consists of a magnetic separator, cleaning and a thermal stabilization of the seeds. Further accessories are a filtration unit that includes a pump integrated directly in the settling tank and a plate filter. The filtered oil is transported by a pipe into oil storage, which consists of two tanks with a volume of each either 1 m3 or 7 m3, depending on the customer’s requirements. Oil storage can be equipped with an outlet pump, which allows the oil to be transferred from the storage tanks into transport vessels or a cistern. A part of the pump is a work desk with a manual valve for bottling of oil into plastic bottles or cans. Press cake storage contains conveyors, which transport the cakes out of the press shop.
The press shop Compact can further be equipped with the dehulling and hull separation module, which separates the kernels from their hulls, and a part of the hull material is separated out as a by-product. This is convenient especially for sunflower seeds and soybeans. Press cakes from hulled seeds have a higher relative content of protein, which increases their feed value.