Abattoir Practices and Animal Products Technology

PROCESSING AND PREPARATION OF BLOOD MEAL

• Blood may be processed by heat treatment or without heat treatment.
• Processing of blood without heating will cause problems while feeding the meal to livestock.
• Raw, unsterilized blood meal is not recommended for feeding purposes.
• But in small abattoirs provision of blood processing plant is a costly affair.

Heat-treated blood

• Although dried raw blood has not been sterilized during manufacture, it is possible to sterilize the meal itself by heating it in a stove.
• Blood can be cooked together with offal and condemned carcasses.
• If blood only is available, this can be processed in the following manner.
• The blood is heated with constant stirring until it coagulates, care being taken to avoid burning or charring.
• An equal amount of boiling water is then added to the blood and the mass boiled together 4 to 5 lbs raw blood are equivalent to 1lbs of dried blood meal or 8 lbs of the mass prepared by adding water.
• Bran, pollard or other finely ground vegetable mater can be; mixed with the blood to add consistency.
• The feed prepared in this method has no keeping qualities whatever and efficient arrangement must be made for daily collection and feeding to livestock.
• Apart from blood collection, a speedy collection and feeding to livestock, a speedy collection without the addition of water and rapid elimination of moisture prior to drying are essential in order to obtain a good product.
• This is achieved by coagulation and pressing.