The factors that influence pellet quality are: formulation, grinding, conditioning, type of machinery and cooling, but it’s generally agreed that the formulation is by far the most important element affecting the process.
Several studies clearly indicate that pelleted feed improves animal performance and most feed mills are using the pelleting process to reduce pathogens, increase the density of the feed and minimize segregation of ingredients during transport and feeding.
The pellet cooler is used to reduce the high temperature of pellets who just come out from the pellet mill to above room temperature. It plays an important role in large pellet mill plant because the cooling process guarantee pellets production continuously.
Pellet cooling system performance is affected by many variables. The first are variables found in the air being used and include: air temperature, air relative humidity, airflow, the amount of air passing through the cooler.
In Samokov, Bulgaria, La Meccanica di Reffo has set up an advanced plant for the production of biomass pellets. It covers an area of about 50,000 square meters, of which 6,000 square meters are used for the production area, wood chip storage and pellet storage and 25,000 square meters for raw material storage.