Method of separating meat components via centrifuge
A centrifuge has an inner and an outer screw. The outer screw transfers material towards a cone-shaped section that leads to an outlet of the centrifuge. A mixture of meat components, liquid carbon dioxide, gas, and optionally water, is spun in the centrifuge. The dense components, such as lean meat, will accumulate away from the axis of rotation and be transferred by the outer screw towards the cone-shaped section. The less dense components, such as fat and adipose tissue, accumulate toward the center of rotation, and are transferred toward an outlet of the centrifuge via the inner screw. Gas accumulates in the proximity of the cone-shaped section and impedes liquid carbon dioxide from exiting with the dense components. The centrifuge is pressurized, which maintains carbon dioxide as a liquid.
1. A method for separating meat components, comprising;
(a) centrifugally spinning a mixture of meat components, a fluid including at least one of, liquid carbonic acid, water, an acid, an alkaline solution, or water with carbon dioxide, and a gas, within a centrifuge to separate meat components in concentric zones according to density, wherein denser components accumulate farther away from the axis of rotation and less dense components accumulate closer to the axis of rotation; and
(b) transferring denser components towards a cone-shaped section of the centrifuge via a first screw action and transferring less dense components towards an outlet of the centrifuge via a second screw action, wherein gas can accumulate at a zone in the proximity of the cone-shaped section so as to impede the fluid from exiting with denser components.
2. The method of claim 1 , wherein the denser components include lean meat, and the less dense components include fat.
3. The method of claim 1 , wherein the pressure within the centrifuge is controlled to maintain fluid density from 45 to 65 pounds per cubic foot.
4. The method of claim 1 , wherein the pressure within the centrifuge is controlled to maintain fluid density from 50 to 60 pounds per cubic foot.
5. The method of claim 1 , wherein the pressure within the centrifuge is controlled to maintain fluid density from 52 to 58 pounds per cubic foot.
6. The method of claim 1 , wherein the fluid is extracted from the centrifuge, chilled, and introduced into the centrifuge.
7. The method of claim 1 , wherein transferring of meat components occurs during or after centrifugally spinning.
8. The method of claim 1 , wherein water is added to the centrifuge to compensate for water lost by the meat.
9. The method of claim 1 , wherein the gas includes at least one of carbon dioxide, carbon monoxide, a noble gas, or a combination thereof.
10. The method of claim 1 , wherein the centrifuge creates a centrifugal force corresponding to a gravitational force of 30 G to 300 G.
11. The method of claim 1 , further comprising introducing sodium chlorite and water into the centrifuge to inactivate bacteria.
12. The method of claim 1 , wherein the oxygen content in the centrifuge is kept below 500 ppm.
13. The method of claim 1 , wherein the meat components are size reduced before centrifugally spinning.
14. The method of claim 1 , wherein the cone-shaped section leads to a narrow conduit, the denser components, fluid, and gas form strata, wherein the gas stratum extends beyond the diameter of the narrow conduit to impede the fluid from exiting with denser components.
15. The method of claim 1 , wherein the gas forms a stratum of gas that fills the central volume of the centrifuge to impede the fluid from exiting with denser components.