Industrial rendering is a factory-scale process that uses slaughterhouse waste, restaurant grease, and butcher shop trimmings as its raw materials. This material can include the fatty tissue, heads, bones, offal, and other waste animal parts. The rendering process simultaneously dries the material and separates the fat from the bone and protein. After rendering, the materials are much more resistant to spoiling. The fat can be used in animal feed, in soap-making, in candles, as a raw material for biodiesel production, and as a feed-stock for the oleochemical industry. The bone and protein becomes dry particles known as meat and bone meal. Workers and cattle in a slaughterhouse. ... Offal is the entrails and internal organs of a butchered animal. ... Biodiesel sample Biodiesel is an alternative to petroleum-based diesel fuel made from renewable resources such as vegetable oils or animal fats. ... Oleochemicals are chemicals derived from biological oils or fats. ... Meat & bone meal Meat and bone meal (MBM) is a by-product of the rendering industry. ...
For many years meat and bone meal were fed to cattle. This practice is now prohibited in developed countries because it is believed to be the main route for the spread of BSE (mad-cow disease). Meat and bone meal is still fed to non-ruminant animals in the United States. Bovine spongiform encephalopathy (BSE), commonly known as mad cow disease, is a fatal, neurodegenerative disease of cattle, which infects by a mechanism that shocked biologists on its discovery in late 20th century and appears transmissible to humans. ... A ruminant is any hooved animal that digests its food in two steps, first by eating the raw material and regurgitating a semi-digested form known as cud, then eating the cud, a process called ruminating. ...
See also kitchen rendering. In the kitchen, rendering can mean clarifying butter into ghee, suet into tallow and bacon fat into lard. ...
In the absence of the renderingindustry, the cost of waste disposal of waste animal material would be very high and would place a significant economic and environmental burden on areas involved in industrial scale slaughtering.
Other major factors which impacted the industry in the 20th century were the popularization of chemical fertilizers, the development of synthetic detergents, the widespread adoption of "boxed beef" in the USA, and the change in consumer eating habits to reject animal fats.
The renderingindustry is one of the oldest recycling industries, and made possible the development of a large food industry.
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