Technology for preparing monosodium glutamate by utilization of rice

The invention discloses a technology for preparing monosodium glutamate by utilization of rice. The technology is as follows: rice is ground into a slurry, The medium temperature alpha amylase, the xylanase and the glucoamylase are added, and a starch enzymatic hydrolysis solution is prepared; a fermentation medium is prepared, corynebacterium crenatum B9 is selected, strain inoculation is carried out for fermentation, the inoculation amount is 1%, the fermentation temperature is 37-39 DEG C, and the culture time is 25-28h; thin and long crystals are selected as seed crystals, the pure liquid dosage is 38%, the mother liquid dosage is 62%, crystallization is carried out and the primary crystallization rate is 68.1%, and thin, long, bright and clean monosodium glutamate is obtained, 1g of crystal monosodium glutamate contains 1105-1110 particles, and the monosodium glutamate is fluffy in volume. The purity of the prepared monosodium glutamate can reach as high as 99.9%. The enzymolysis time is short, strains can be inoculated for fermentation directly, the fermentation efficiency is high, the fermentation time is short, and the cost is saved. Because of decrease of the separation mother liquid amount, operation material liquid cycle frequency is lowered and the technology facilitates to raise the refining yield.