A process for removing fat from greaves

摘要

Crushed animal bones are fed from a crusher (2) to a grinder (3) for mincing. The minced bone is delivered through a direct steam injection melt tube (5) for melting the fat into a first centrifugal separation decanter (6) where water and fat are centrifuged from the minced bone. Partly treated greaves with a fat content of 7% to 8% by weight of dry matter are delivered from the second decanter (6). Water at 70 DEG C is added to the partly treated greaves in a pipe (9) in the ratio of one part by volume water to two parts by volume of the partly treated greaves. The water/greaves mixture is pumped by a pump (11) into a second centrifugal separation decanter (12) where the fat content of the greaves is further reduced to produce finished greaves with a fat content of less than 1%.