What Is A Rendered Product?
According to the USDA, rendering is defined as:
“A process of using high temperature and pressure to convert whole animal and poultry carcasses or their by-products with no or very low value to safe, nutritional, and economically valuable products. It is a combination of mixing, cooking, pressurizing, fat melting, water evaporation, microbial and enzyme inactivation.“
Raw material is ground, cooked, then pressed to remove fat. The resulting product is then ground again and becomes "meal".
Waste Advantage Magazine, a rendering industry publication, states:
“The majority of the waste material that is processed in rendering comes from slaughterhouses and can include fatty tissue, bones and other processing offal. Offal is the parts of an animal that are not fit for human consumption, such as organs, blood and feathers. Almost 30 percent of an animal’s live weight ends up as offal, which would be expensive to dispose of and wasted if not for the rendering process.“