Änderung der Preßfähigkeit durch Austausch von Sojabohnen gegen Sojaextraktionsschrot und Öl

Variations in the Pressing Capability by Exchange of Soya Beans for Soya Extraction Meal and Oil Feeding stuff with a high energy content needs the addition of fats and oil. By this, difficulties in pelleting and formation of solid pellets arise. Therefore the subsequent spraying upon the pellets has been applied in industry. This is not the optimum because of possible oxidation and storage difficulties. Therefore the complete soya beans are applied directly, the fat is enclosed in the cells and better protected against oxidation. Trials in this direction confirm this, high fat amounts in the mixture can be pressed to solid pellets, too. The variation of the fat is investigated by samples during pressing. The peroxide values for example show however a detectable increase, but this is by no means of any interest. If the fats are extracted and stored under defined conditions the influence of the pressing procedure is obviously. The oxidation after conditioning and pelleting is different, depending on the meal mixture. High POV occur which indicate a decrease of quality. Also in long term conditioning a distinctly higher peroxide value is obvious. The effect of the pressing process can be observed only during storage under certain conditions. The results indicate that the pressing capability can be considerably influenced by the kind of the fats and by way of addition. On the other hand some questions remain open.