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

LARGE SCALE PROCESSING

• Blood can be spray dried or batch dried.
• Wet blood should be dried daily.
• Well-dried blood can be milled whenever convenient.
• Spray drying
  • This is similar to (that of) milk powder manufacture and yields a very fine water-soluble powder of light colour.
  • The defibrinated blood is blown through a fine nozzle into a heated chamber and falls down in the form of powder.
  • Installation is very costly and this is designed for larger production.
• Batch drying
  • This is a blood drier, which is a matter similar to that of dry rendering of meat offal, but with a very smooth inner shell.
  • In this method, overcooking leads to over agitation and loss of fine particles in the wastewater whereas, under cooking has the same effect, as some uncoagulated blood will be lost.
  • Blood after coagulation, should have moisture content of slightly over 70%.