MULTIENZYMATIC PRODUCT WITH GLUCOAMYLASIC, PROTEOLYTIC AND XYLANASIC ACTIVITIES AND PROCESS FOR THE PRODUCTION THEREOF BY FERMENTATION IN THE SOLID STATE OF WHEAT SOUND WITH ASPERGILLUS NIGER

摘要

Enzyme preparation (I) produced by fermenting wheat bran with an Aspergillus niger strain has glucoamylase, protease and xylanase activities of at least 100 U/g (dry basis), provided that the glucoamylase activity is at least 750 U/g and/or the xylanase activity is at least 300 U/g. An Independent claim is also included for the production of (I) by: (1) moistening and pasteurizing or sterilizing wheat bran; (2) inoculating an at least 10 cm thick layer of the bran with Aspergillus niger; and (3) fermenting the bran in an aerated and periodically agitated reactor at 28 - 38 degrees C for 1 - 3 days while maintaining the moisture content of the bran at 50 - 60 wt.%.