Proteine enthaltendes Futtermittel und Verfahren zur Herstellung

A protein-containing feedstuff is produced by subjecting a material that contains vegetable protein to a heat-treatment; washing the resultant material one or more times, and preferably in a counter-current manner, with water, generally at pH of less than 7 and at a temperature of from 5 to 50 DEG C; and subjecting the washed material to a farther heat-treatment, preferably a thermal drying step in which the protein-containing material may be dried to a moisture content of 12% by weight or less. Antinutritional factors such as mono-, di- and oligosaccharides may thereby be removed whilst retaining important nutrients such as isoflavones. Phytase may be added to the washwater in order to reduce the content of phytate in the product. Suitable starting materials include defatted soy flour, soy meal and texturized soy products. The feedstuff is suitable for the feeding not only of fish or crustaceans in aquaculture, but also of other livestock, for example piglets. The product may also be used for human nutrition.