Animal fats restaurant greases

Grease is animal fat with a titer below 40°C. Choice white grease is derived primarily from the rendering of pork offal whereas yellow grease is derived from restaurant grease (4). 

The animal feed industry is a major user of rendered animal fats, recycled restaurant grease, and cooking oils. Fats are the highest caloric dense feedstuff and foodstuff. In addition, fats and certain of their component fatty acids are essential and indispensable for body functions in addition to their caloric function. The U.S. rendering industry processes about 5.3 million metric tons (MMT) of the following fats on an annual basis ... 

Bio-diesel differs from the term bio-fuel in that bio-diesel is conventionally defined as a bio-fiiel that is produced through frani -esterification of the oil or fat with methyl alcohol resulting in the formation of methyl esters (bio-diesel feedstock) and the byproduct glycerine. Bio-diesel can be made from animal fats, recycled cooking oils, restaurant greases, vegetable oils, marine oils, and others. The product has been produced in Europe for many years, and European development is more advanced than in the United States. Table 10 shows the relative production of bio-diesel in five European countries compared with the United States for three different years, 1997, 2000, and 2003 (29). 

Waste Fats.—Under this classification may be included marrow fat, skin greases, bone fats, animal grease, melted stuff from hotel and restaurant refuse, and similar fatty products. The following is a fair typical selection —... 

Used cooking oil/yellow grease is the used-up fat and oil obtained from the food industries, canteens, and restaurants. It mainly contains vegetable oils and less animal fat, which can be used in biofuel production. Brown grease/trap grease, a water/oil emulsion with... 

Animal by-products, condemned carcasses and parts from packing plants, trimmings and bones from butcher shops, spent frying fats/oils, and fats collected from restaurant and food service kitchen grease traps are dry-rendered to produce inedible fats and oils. 

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