The production of the pellets started in the USA after the 2nd World War and was used as animal nutriment. It proved to be ideal in industrial farming due to their enormous advantage that they have made the add of proteins, mineral salts and other important additives to the nutriment possible without changing its taste. It is also easy to store for a long period of time, because it does not deteriorate and it is easy to transport due to its light weight. Thanks to the successful use in stock-raising, the wood pellet started to get popular in other industries, which put the bases of wooden pellet fabrication, contributing to the development of a new thermo-energy source, the wood pellets.

During the pelleting process, the 100% natural raw material (sawdust and wood chips) is pressed to small bars, without adding synthetical adhesives. The natural adhesive is the lignin found

originally in the processed wood, but the use of oily seeds, different types of flour, which contribute to a better solidity is widespread also. The advantage of the compression is that the product is pure, user friendly, easy to pack and to transport. Pellets can be made from nearly any wood variety that has the proper density and granulation.

Wood pelletEnergy grass pellet
Heat value (MJ/kg)18,516,5
Heat value (kWh/kg)5,144,58
Ash-content (%)0,5-17,5-11

The most common energy materials used in the pelleting process are wood chips and sawdust. Wood pellets represent a pure fuel with high energy value, easy storage and transport.