How are wood pellets made?
Wood pellet are small, compressed cylinders of wood dust. They are made by removing moisture from the incoming wood fibre and grinding it into dust before compressing it into small cylinders. The lignin in the wood acts as a glue to hold the compressed particles together. Heat is applied in this process which causes lignin—a natural polymer found in wood—to act as a glue to hold the compressed particles together. The result is a dry, highly compressed and high energy-value product that can be easily handled and transported efficiently over very long distances.
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Wood pellet are the most common type of pellet fuel and are generally made from compacted sawdust and related industrial wastes from the milling of lumber, manufacture of wood products and furniture, and construction. Other industrial waste sources include empty fruit bunches, palm kernel shells, coconut shells, and tree tops and branches discarded during logging operations.
How are wood pellets sourced?
Wood pellets are sourced from sawmill and harvest residuals, or from low-quality logs and bush grind that would otherwise be rejected by other industries. The pellet industry sources an estimated 85% of its fibre from the by-products of the sawmills and allied industries. A new study confirms that wood pellet in British Columbia are sourced entirely from sawmill and harvest residuals or from low-quality logs and bush grind that would otherwise be rejected by other industries.