Gist-Brocades B.v.

Roland Jurgen Betz

Hans-Peter Harz

Rudolf Carolus Barendse

The present invention discloses methods to improve the processing and storage stability of dry enzyme preparations. To this extend an inorganic salt, e.g. MgSO.sub.4, is dissolved in an enzyme containing solution which is subsequently dried, using e.g. spray drying. Not only does the addition of salt improve the yield of enzyme activity upon drying, also the storage and processing stability of the obtained solid composition containing the enzyme and the inorganic salt are improved with respect to enzyme activity. The invention further discloses solid compositions comprising enzymes and inorganic salts.

Salt-stabilized enzyme preparations

The present invention discloses methods to improve the processing and storage stability of dry enzyme preparations. To this extent an inorganic salt, e.g. MgSO.sub.4, is dissolved in an enzyme containing solution which is subsequently dried, using e.g. spray drying. Not only does the addition of salt improve the yield of enzyme activity upon drying, also the storage and processing stability of the obtained solid composition containing the enzyme and the inorganic salt are improved with respect to enzyme activity. The invention further discloses solid compositions comprising enzymes and inorganic salts. Preferably the enzymes comprise phytase, protease, hemicellulase, cellulase, and mixtures thereof, and the inorganic salts are divalent cations comprising zinc, magnesium, or calcium. The concentration of the inorganic salt is at least 5%, preferably at least 15%, more preferably at least 30%, still more preferably at least 60%, and most preferably at least 90% (w/w).

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Niederkirchen, Germany

Roland Jurgen Betz