Animal Science Chapter 7 - By-products of meat animals
what are the sources of the rendering industry?
packing and processing plants butcher shops restaurants supermarkets farmers ranchers
what are fatty acids used in?
plastic consumables cosmetics lubricants paints deodorants polishes cleaners asphalt inks
where is it passed through after that?
presses to remove fat
what are primary products in other countries? by-products?
primary products: work, milk, hides, skins by-products: meat (esp. in older animals)
what is poultry by-product meal high in?
protein and fat
what does the rendering industry do?
recycles offal, fat, bone, meat scraps, and entire animal carcasses
what is used for biodiesel?
rendered fats and oils
what is a primary use of hide or skin?
shoe leather
what are inedible tallow and greases used in?
soaps lubricants feed fatty acids
what does use of byproducts increase?
sustainability and efficiency
what are higher-valued inedible by-products?
tallow hides inedible organs
what do these options differ in?
they differ in cost and ease; differing laws regarding use
why must careful attention be paid?
to avoid cross-contamination of disease to humans or other livestock, to assure environmental quality, and to avoid odor
what holds these protein supplements?
typically monogastric animals because of their need for high quality protein
what affects the value of a hide or skin?
brands insects stains
what are acceptable disposable methods?
dead livestock removed by a licensed rendering company compost the carcass burn the carcass in an incinerator bury the carcass at least 4 ft. deep
what are byproducts classified into?
edible and inedible products
what is the most valuable byproduct?
hide
What are by-products in the US?
hides, fat, bones, internal organs
what happens to the offal after slaughter?
it is immediately transported to rendering facility where it is cooked to destroy all pathogenic organisms
what are fats used to produce?
lard and tallow
what kind of market is inedible tallows and greases?
large export market
what are products?
less value than the major product
what are variety meats?
liver heart cheek meat oxtail pigs feet tongue tripe chitlins sweetbread
what are the protein supplements of livestock?
meat and bone meal blood meal
what does increasing sustainability and efficiency do?
minimizes waste increases output for same input
what does the US export market yield on a yearly basis?
1.5 billion
how much of variety meats can an average slaughtered steer produce?
45 lb of variety meats
how much is pet food worth of by-products used annually?
8 billion
how much of the value of a fed steer are by-products?
8 to 10% value
what is the US per capita consumption of variety meats?
9 lb, thus some are exported
what are the two primary products of the rendering industry?
animal fat and animal protein
what are pharmaceuticals made from?
animal products and many are made synthetically
what does not go into human edible products?
animals that die during their productive life
what happens to the remaining material?
becomes poultry by-product meal
