LPT 312: Abattoir Practices and Animal Products Technology (1+1)

MAIN BY-PRODUCTS OBTAINED BY RENDERING

• Tankage, meat-meal tankage, digester tankage, wet rendered tankage or feeding tankage is the finely ground, dried residue from meat-animal soft tissue by-products and dead animal rendered products from direct steam injection (wet-rendering) systems. It is high in protein (55-60%).
• When these products contain more than 4.4% of phosphorus, they must be designated as digester tankage with bone, meat and bone meal digester tankage, meat and bone meal tankage or feeding tankage with bone.
• Meat meal or meat scraps are similar to tankage, but rendering is completed in steam-jacketed tanks (dry rendering). Protein quality is improved. If phosphorus is greater than 4.4% the product must be designated as meat and bone meal or meat and bone scrap.
• Feather meal is composed of feathers, wet-rendered and ground to form a high protein (80%) meal.
• Poultry by-product meal is similar to meat scrap/meal.
• Blood meal is dried, ground blood, high in protein especially the amino acid lysine.
• Blood flour is dried blood, reduced to affine powder.
• Fish meal is similar to meat scraps. It is high (60%) in good quality protein.
• Steamed bone meal or bone meal is ground product, obtained by cooking dried bones, after the removal of grease and meat fibre, with steam under pressure in the process of obtaining gelatin or glue. It is suitable for animal feeding.
• Steamed bone meal or bone meal is ground, wet-rendered (steamed under pressure) or dried bones, suitable for animal feeding.
• Bone meals are largely mineral with upto 15% protein.