It's the first step in animal rendering. Fallen stock are rendered, then they are processed into various by-products like bone meal.
This particular machine discharges the crushed animals into a product that can be used as feed for other animals.
Fecal matter and all the rest is boiled at 105 �C for hours - any bacteria in the guts is long-dead before the bone-meal, tallow fat, and meat by-products get added to your dog and cat food.
Sorry, but bone meal from this process is a vital ingredient to "organic farming" fertilizers. Unless you're a Jainist who survives solely on algae and air you are contributing to the cruel death of millions of lesser evolved organisms.
Really needs a guy up there at the end wearing a blood-caked smock and hosing the machine down while it's running and then some jokester of a cow orker runs up and gives him a shove and catches him and then they all laugh their asses off.
dammit... youtube keeps taking copies of this video down as soon as I can find them. Which is a shame because this video has basically haunted my daydreams for a year.