Method for preparing nitrogen contained syrup in use for ferment through wheat beta starch multienzyme method

The present invention discloses a process for preparing the N-contained syrup from the wheat starch B by multi-enzyme method, which can be used for fermentation, includes such steps as preparing the slurry, liquefying, saccharifying, protein converting, filtering and concentrating. The process features that: the starch, protein, pentosan and fat, which are the basic components of wheat starch B, are hydrolyzed by the amylase, pentosanase and lipase, thus apart from the obtained small quantity of faecal higher fatty acid with higher melting point, the protein which is not be hydrolyzed completely, and the added protease, the hydrolyzate and the proteolysis hydrolyzate of the added various kinds of amylase, dextranase and lipase are almost remained in the N-contained starch syrup . Therefore, the process for preparing the N-contained syrup from the wheat starch B by multi-enzyme method has the advantages of super-high output rate which is almost 100%, and the ability of being applied and carried out directly for the prior production line of preparing starch syrup by multi-enzyme method.