Composite organic nitrogen source and preparation method thereof

Abstract

The invention provides a high-quality nitrogen source and a preparation method thereof. The high-quality nitrogen source is prepared by production technique improvement and effective component optimization. The main components of the nitrogen source are yeast powder, cotton seed albumen powder and full-cream peanut powder; and the auxiliary materials are starch, calcium biphosphate, calcium carbonate, zinc sulfate, betaine and the like. The preparation method comprises the following steps: sufficiently and uniformly mixing, hardening and tempering, bulking at moderate temperature, drying and grinding into micropowder to prepare the high-efficiency high-quality nitrogen source. The nitrogen source has the advantages of reasonable proportioning, high nutritive value, favorable microbe utilization effect and the like, and can enhance the fermentation titer and lower the production cost. The specific gravity of the bulked nitrogen source is changed; and thus, the nitrogen source can exist in a suspended state in the fermentation liquid and prevent the material from settling, thereby enhancing the utilization ratio of the raw materials and being beneficial to implementing clean production.

Description

technical field [0001] The invention belongs to the field of biological fermentation, and in particular relates to a composite organic nitrogen source and a preparation method thereof. Background technique [0002] my country is the world's main producer of pharmaceutical raw materials, and raw drug products such as antibiotics, amino acids, and vitamins occupy an important position in the world market. The total annual production of antibiotics in my country is about 50,000 tons. The production of these antibiotic raw materials is produced by industrial fermentation, and the total demand for medium is more than 200,000 tons. The output of my country's three major fermentation products is about 1 million tons, and the fermentation production of enzyme preparations such as amylase, protease, cellulase, and glucoamylase requires a large amount of culture medium. The production capacity of amino acids continues to expand, and the demand for culture media is also growing rapidl...

AI Technical Summary

Problems solved by technology

[0008] ② The dispersibility of nutrients in the fermentation broth needs to be improved

[0012] Chinese invention patent application CN104611372A discloses a method for preparing peanut cake powder specially for fermentation, which includes the steps of crushing, mixing extrusion expansion, drying, and micronization. The extrusion temperature is 80-150°C and the pressure is 0.8-1.5 MPa, it can be seen that the temperature of the puffing process is still high, and there is a risk that the nutritional value will be destroyed