Aqueous liquid and granular material containing phytase with an activity of at least 14,000 units. / T, for use in the manufacture of animal feed, animal feed, premixes or semi-finished animal feeds containing said granular material and method for stimulating growth ANIMALS

摘要

A process is disclosed for preparing aqueous phytase-containing liquids involving culturing microorganisms of the genus Aspergillus or Trichoderma in a medium containing assimilable carbon and nitrogen sources (e.g.glucose and ammonium ions), filtering the medium and subjecting the resulting filtrate to ultra-filtration to give an aqueous composition having at least 14,000 FTU/g. This aqueous liquid can be used to prepare granulates that can be incorporated in animal feedstuffs.