Press cake is the solid material left over after pressing to separate solids and liquids. It has various uses, such as refining cocoa solids to make cocoa powder or using olive pomace as fertilizer. It can still contain valuable vitamins and minerals and is often used by factories to increase efficiency.
The term “press cake” refers to the solids left over after something has been pressed to separate the solids and liquids it contains. There are numerous uses for this substance, depending on the product it comes from. As a general rule, consumers rarely come across a pure press cake, because it is the result of an industrial process, although they undoubtedly use products made with it.
A well-known example of pressed cake is cocoa solids, the solid materials left over after the cocoa beans are pressed to extract their cocoa butter. Cocoa solids can be refined to make cocoa powder and can also be mixed with a variety of ingredients, including cocoa butter, to make chocolate for consumption. Depending on how the cocoa solids are treated, they can be used in a variety of chocolate products, from chocolate coatings made from cocoa solids and whatever oil is currently cheap to gourmet truffles made with high quality raw ingredients. .
Another type of press is marc, the material that remains after pressing olives to make olive oil or after pressing various fruits to make juices and wines. The pomace is used as a fertilizer in many regions and can also be processed to make things like pomace wine or fed to animals. In some cases, fruit pomace is processed to make various concentrated products, such as dietary supplements. Fruit pomace can also be distilled to extract useful vitamins and other materials it contains, as is the case with pomace, which is processed for grape seed oil.
Pressing various nuts and grains for oils also produces cake presses, which some factories burn in their furnaces to generate energy. These operations may also sell their press cake as animal fodder or store it in the ground to enrich the land. The cake also remains after the soybeans are pressed to make soy milk, in which case it can be fermented to make other soy products.
While the press cake lacks most of the oils and juices contained in the original product, it can still be very useful and sometimes valuable. It can still contain many vitamins and minerals, along with the chemicals that make foods taste or smell special. Most factories that make dies for presses find a use for it, both out of a desire for efficiency and the fact that it’s waste materials.
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