Patent ID: 8916213

Claim:
A method of making animal feed additive particles having an onion-like cross-section, the method comprising: 1) providing a granulator comprising a chamber, providing a liquid composition comprising a mixture concentrate comprising an L-lysine fermentation broth having about 48 wt % to about 52 wt % of solid particles, and supplying seed particles of 200-500 μm in size into the chamber, 2) blowing heated air in the chamber upward from under the particles to float at least part of the seed particles; upwardly spraying the liquid composition from below the particles floating within the chamber, wherein the liquid composition is coated over individual particles floating within the chamber, wherein the liquid composition is repeatedly coated over the particles and dried by the air blown in the chamber to form a core and a plurality of layered shells surrounding the core, wherein the heated air is blown at a pressure of 0.1 to about 0.2 kg/cm 2 , and 3) collecting the onion-like animal feed additive particles from the chamber, wherein about 0-5% of the onion-like particles collected have a granule size of smaller than about 500 μm, about 20-30% of the onion-like particles collected have a granule size of about 500 μm to about 1000 gm, about 60-70% of the onion-like particles collected have a granule size of about 1000 ˜tm to about 1300 μm, and about 0-5% of the onion-like particles collected have a granule size of greater than 1300 μm.