Biomass pellets are made from either wood residue (sawdust, shavings and offcuts, which are by-products of wood processing), or from freshly cut timber especially felled for the production of wood pellets. Very high temperatures are used to dry the material and it is then compacted in a pelletizer.

To make wood pellets at home, you need crush the materials into small size with a wood hammer mill, then dry the crushed materials with a dryer machine(optional). After that, you can feed the materials into a flat die wood pellet mill. They will get formed into cylindrical solid pellets.

To make pellets, the biomass must first be cleaned to remove contaminants. The clean biomass is then ground in a hammer mill or chipped to a uniform size, which must be less than the thickness of the pellet that will be produced. Grinding down biomass helps to reduce the horsepower the pellet mill must produce.

Most pellets are made in bulk by industrial pellet mills, but homeowners and small businesses can also turn organic materials into wood pellets. You can make your own pellets at home by breaking raw wood matter into small pieces and pressing the wood into dense pellets.

The heat could help the lignin in the wood fiber out of the sawdust, and bonding the sawdust as the pellets. 2. Put a large box under the chute of the biomass pellet machine for catching the pellets during pelletizing process. Feed the sawdust by handfuls or small shovelfuls into the hopper of the pellet mill.

lignin
Wood Pellet Production At last, the wood fiber makes it to the pellet mill. Using pressure, the wood fiber is forced through small circular holes (like a garlic press), and heat is used to make the wood secrete lignin, which is used as its natural binding agent, to form the wood fiber into its pellet shape.

Sawdust preparation The production of 1 ton pellets needs the about 7 bulk m³ sawdust with the moisture content around 50-55%.