Feed-a-Gene: Nutritional evaluation of dehulling and treatments of expeller soybean meal

Feed-a-Gene: Nutritional evaluation of dehulling and treatments of expeller soybean meal


I’m Eric Royer, I work as a swine nutritionist
for the IFIP institute in France. In the Feed-a-Gene project I’m involved in
the first Work Package, WP1. The goals of the Work Package 1 are to produce
new innovative feedstuffs, new processing of raw materials for monogastric utilization,
and to evaluate new methods of assessment of the nutritional value of these feedstuffs. I’m the coordinator of subtask of the Work
Package 1, precisely dedicated to the valorization of soybeans and rapeseeds. European soybeans were mainly used for human
utilization, and it was an important feedstuff. Nowadays the soybean production is expected
to grow more and more in Europe. There is also a demand for using the soybeans
as a GMO free and locally produced material to identify and label this product as this,
and to use it for animal production. It seems necessary now to work on expeller
soybean meals in Europe because we have few data on this process. Crushing European soybeans in large crushing
plants is very complex because it won’t be easy to identify and to label the origin of the beans,
either imported or either locally produced. So that will be easier to do in new plants
of medium or small size and for that an expeller process is more adequate. We have tried to work on the parameters settings
of the processing, of the crushing and of the oil extraction, by comparing different
temperature and different time of eating of the beans, and choosing the optimal, that’s
the first way to do. The second idea was to test the effects of
dehulling, of removing the hulls of the beans, in order to increase the protein content of
the final soybean meal. From our tests, we are satisfied with the
results. They are similar to the value that we expected
and we obtained good quality products with good values for residual oil, crude protein
and protein solubility. So now two systems are available: extrusion
or flaking-cooking. For an industrial, for an operator, the choice
can be made following his needs for the market. Extrusion has to be dedicated to the soybeans
and can not be used for other oilseeds. The flaking-cooking has a lower gross margin
but it can also be used for processing rapeseeds or sunflower seeds. We hope that the next steps of our work
will be to discuss or to help operators to work on projects of investments
and perhaps that we will need to do economic studies. At the end of this Feed-a-Gene project we hope
that the products we have worked on will be interesting and could be used by the operators,
by feed manufacturers or other operators. This can help them to be less dependent of
the imported protein sources and to use with more accuracy the protein products produced in Europe.