Learning how to make biomass briquette has sometimes been called an art more than a science. Making wood pellets and other biomass briquette is a simple process but in order to make quality pellets you will need some specialized knowledge.
Pellets or briquettes can be made from wood, paper, cardboard, straw, alfalfa, grain, corn husks, corn stalks, grass clippings, leaves and many other forms of biomass. People started making pellets from materials like grain and alfalfa over a century ago for animal feed. It wasn't until the 70's that some pellet manufacturers learned how to make biomass briquettes that could be used for heating.
In order to make pellets a biomass briquette press is needed firstly. The raw material is compressed by a roller that rolls across a die and squeezes the material into tapered holes in the die. As the material compresses it becomes very dense and hot. The heat melts the binding agents in the material which when cooled will act as glue that will hold the briquette together.Many materials like wood naturally contain lignin which works as a binding agent. With these materials they can be made into briquette in their pure form without any additives. Other materials may need to have binding agents like vegetable oil added.
As more material is pressed into the dies the finished briquettes are extruded out the other end of the dies and broken into proper lengths. As soon as they cool they are finished and ready to be used or packaged to be shipped to the market place.
Making biomass briquettes is a simple process but making quality biomass briquettes that aren't going to crumble into pieces takes some knowledge and experience. The material must be dried to the proper moisture content and be of the right consistency. It just takes a little guidance and some trial and error to learn how to make biomass briquettes.