METHOD 4CONTINUOUS OR BATCH PRESSURE
Reduction
1. If the particle size of the specified risk material to be rendered is more than 50 millimetres, the specified risk material shall be reduced in size using equipment specified in the licence, set so that the particle size after reduction is no greater than 50 millimetres or such smaller size as the licence shall specify. The effectiveness of the equipment shall be checked daily and its condition recorded. If checks disclose the existence of particles larger than is permitted in the licence, the process shall be stopped and repairs made before the process is resumed.
Time and temperature
2. After reduction the specified risk material shall be heated to a core temperature of more than 133°C for at least 20 minutes without interruption at a pressure of at least 3 bar.
3. The rendering may be carried out in batch or continuous systems.