What are the key diferrences between slaughterhouse output crude animal by-products and it's derived products from rendering industries?

The outputs of the slaughterhouses are farmed animal products for human consumption and crude animal by-products that are further processed in other industries, such as fat processing and rendering industries to make new and safely derived products. All slaughterhouse crude ABPs must be processed, that is resulting derived products in the rendering industry. Slaughterhouses do not process animal by-products but deliver such materials to other and specialized ndustries, specialized for fat processing and rendering operations only at the usual processing condition 133°C.

The direct agricultural use of the crude protein content animal rendering products provides high environmental risk by possible trans and recontamination by human and animal pathogens. Despite animal rendering by-products (protein based bone meal and MBM) are sterile products at the point of production, there is a very high risk for cross and recontamination during applications. While rendered products leave the cooker negative of the bacteria, recontamination can occur anywhere along the way. Not all animal by-products are suitable for production of high quality recovered Phosphorus fertiliser.