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Method for preparing granular animal feed additive and granular animal feed additive prepared by the method
Method for preparing granular animal feed additive and granular animal feed additive prepared by the method
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机译：颗粒状动物饲料添加剂的制备方法及用该方法制备的颗粒状动物饲料添加剂
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摘要
Provided are a method for preparing a granular animal feed additive and the granular animal feed additive prepared by the method. The method includes: filtering, with a membrane filter, a fermentation broth obtained from a lysine producing microorganism cultured in a lysine producing condition to obtain a lysine-containing filtrate and a microorganism-containing sludge; drying the filtrate to obtain a concentrate with a total solid content of 48 to 52 wt %; granule-drying the concentrate at a temperature of 50° C. to 60° C. to obtain granules; and coating the granules with a coating agent containing one or more selected from the group consisting of the sludge, a diluent or a free lysine as a lysine content adjustor, and a moisture prevention agent, to obtain lysine granules having the following properties:
Lysine content (lysine sulfate)65% or moreGrain size 300-1,200 μm, 90% or moreApparent density 620-720 kg/m3Protein content 10-15%Total sugar content 0-1%Inorganic material content 0-3%Water content 0-3%Carboxylic acid content 0-8%SO4− ion content 20-25%
