Rice husk is the byproduct of rice processing, the weight of which can amount to 20% of the rice. Rice husk is a kind of renewable energy widely used in sugaring or as fuels for industry or home heating. While as the content of combustible is more than 70%, the most important use of rice husk is to use as fuel. 

There are some advantages to make the rice husks into husk pellet First, rice husk pellets can burn longer than rice husk. After being pelletized, the combustion rate of rice husk can run up to above 95%. Second, rice husk pellets are easier to be stored. When rice husks are made into pellets, the density is greatly improved which making them more convenient to be stored in large quantity. Third, rice husk pellets burn cleaner. When burning directly, the ash content of rice husk is about 15-16%, while the ash content of rice husk pellet is only about 6-7%.