“Smells like money” is what you often hear as you walk into a rendering plant, normally accompanied by the speaker taking a deep breath. To the uninitiated, the smell is nothing like the paper bills in your wallet. It is a deeper richer smell - much like the inside of a pet food bag. More than the smell of "money," it is the smell of recycling and sustainability.
The rendering industry is the original recycler, transforming waste materials from farmers, restaurants, food producers, etc. into products for pharmaceuticals, cosmetics, animal feed, renewable fuels, and more. The process of converting this material into proteins and oils is accompanied by vapors that create odors, environmental concerns, health hazards, and damage to equipment and facility infrastructure.