Wood pellets are fuel made from the by-products of wood transformation. These pellets are produced by maturing, drying and compacting of sawdust, wood shavings and sometimes even agricultural waste. They look like small wooden cylinders.
Pellets are a product of waste recycling in the wood industry and can be automatically fed, through a worm screw,to wood-burning boilers http://www.futura-sciences.com/fr/news/t/terre-3/d/chauffage-domestique-les-chaudieres-a-bois-ont-la-cote_8866/.
In addition, their homogeneous constitution and low humidity rate improves combustion and reduces the amount of ash, soot and other waste. Finally, pellets are easier to transport and store than traditional wood logs.
Wood pellets. © D-Kuru, Wikimedia CC by-sa 3.0