Heat treatment is necessary to avoid spoilage by killing hazardous microorganisms in the raw material that will be transformed into meat and bone meal. The heat treatment in the rendering process can be wet or dry. In the wet process, fat is separated from the other organs when boiling in water. In the dry process, the raw materials go to a steam-jacketed container or cooker, which separates fat with indirect heat. The dry process can be in batch or continuous.

The rendering process to obtain meat and bone meal consists of crushing the flesh, bone, tissues, and organs. Cook the crushed material to separate the fats. Press the mixture to complete the separation of the fats and obtain a protein cake, which is ground into the meal. You can add value to your meat and bone meal if you dry and mill it further. The filtered animal fat can also be used as an animal feed ingredient.