Patent ID: 8636235

Claim:
A method of providing a classified waste stream for the production of an engineered fuel feedstock, the method comprising: processing a waste stream to reduce the size of the constituents of the waste stream to an average particle size of less than about ¾ inch to produce a processed waste stream; sorting the processed waste stream based on density to separate from the processed waste stream a first material of a first density classification having a bulk density greater than about 15 lb/ft 3 ; sorting the processed waste stream based on density to separate from the processed waste stream a second material of a second density classification having a bulk density between about 4 lb/ft 3 and about 15 lb/ft 3 ; and sorting the processed waste stream based on density to separate from the processed waste stream a third material of a third density classification having a bulk density less than about 4 lb/ft 3 .