	US 7,514,111 B2
	Method for preparing granular animal feed additive and granular animal feed additive prepared by the method
Soon Won Hong, Seocho-gu (Korea, Republic of); Gyu Nam Cho, Incheon (Korea, Republic of); Yong Bum Seo, Jongro-gu (Korea, Republic of); Seung Woo Han, Gangseo-gu (Korea, Republic of); Jae Hun Yu, Suwon (Korea, Republic of); and Hyun Tae Kim, Seocho-gu (Korea, Republic of)
Assigned to CJ Cheiljedang Corporation, Seoul (Korea, Republic of)
Filed on Mar. 29, 2005, as Appl. No. 11/91,492.
Claims priority of application No. 10-2004-0022888 (KR), filed on Apr. 02, 2004.
Prior Publication US 2005/0220933 A1, Oct. 06, 2005
Int. Cl. A23K 1/16 (2006.01); A23K 1/18 (2006.01)

U.S. Cl. 426—69 [426/302; 426/656; 426/807]

6 Claims

1. A method for preparing a granular animal feed additive, which comprises:

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 a lysine content adjuster and one or more additives selected from the group consisting of the sludge, and a moisture prevention agent, wherein the lysine content adjuster is a diluent or free lysine depending on the lysine content of the granule, to obtain lysine granules having the following properties:


	Lysine content (lysine sulfate)	65% or more
	Grain size	300–1,200 μm, 90% or more
	Apparent density	620–720 kg/m³
	Protein 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%

and wherein the animal feed additive has a constant content of lysine.