Press cake

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Rapeseed cake pellets (pelleted press cake from the processing of rapeseed)

Press cake or oil cake is the by- product produced in the production of vegetable oil according to the cold pressing principle . The components of the press cake are the solids remaining after pressing the oil seeds and fruits and the oil portion that has not been pressed out. In olive oil production, the press cake is also known as pomace . In contrast to the press cake, the by-product produced during hot pressing or extraction is called extraction meal.

In Germany, rapeseed cake , which is obtained when pressing rapeseed, is important. In Germany, rapeseed is the most important raw material for the production of oil / fat products.

ingredients

Press cake is a mineral-rich product with a high protein content. In contrast to extraction meal , press cake also has a high fat content.

Composition of press cake
in% of dry matter
Rapeseed cake Sunflower press cake
Crude protein 30-36 26.4
Raw fat 14.0-21.7 21.2
Crude fiber 7.8-13.7 29.0

use

Press cakes are suitable as feed in livestock feed, with the exception of products made from pressing inedible raw materials (e.g. jatropha oil ). Rapeseed cake is an increasingly used protein and fat-rich feed for cattle and pigs. If press cakes are used as animal feed, the high protein content means that feed imports, e.g. B. of soy meal , can be substituted. This promotes regional economic cycles, since the cold pressing of oil seeds and fruits takes place in so-called decentralized oil mills , which are usually located in an agricultural environment.

In addition, press cakes are used as organic fertilizer, fuel and substrate for the production of biogas . Technical use is also possible, e.g. B. for protein extraction or for the production of packaging.

swell

Martin Kaltschmitt, Hans Hartmann and Hermann Hofbauer (eds.): Energy from biomass. Basics, techniques and procedures . Springer Verlag, 2nd edition 2009, pp. 764–766, ISBN 978-3-540-85094-6 .

Individual evidence

  1. Martin Kaltschmitt, Hans Hartmann and Hermann Hofbauer (eds.): Energy from biomass. Basics, techniques and procedures . Springer Verlag, 2nd edition 2009, p. 765, table 13.6, ISBN 978-3-540-85094-6 .

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