Biomass plant wood chips

Wood chips are shredded forest residues used as renewable fuel in biomass power plants.

About this subject

Wood chips are small pieces of wood produced from forestry residues such as branches, bark, and low-value trees. They are created by chipping machines and sorted by size to suit different boiler types. In Brazil, the most common source is eucalyptus from planted forests, but sugarcane bagasse and sawmill waste are also used.

In biomass power plants, wood chips are burned in boilers to generate steam, which drives turbines connected to electricity generators. This process is considered carbon-neutral because the CO₂ released during combustion is reabsorbed by new tree growth. Energy efficiency depends on moisture content, ideally below 30%.

Globally, countries like the United Kingdom, Germany, and Canada lead in using wood chips for energy. Brazil, with its vast forest area, has potential to expand this renewable source, especially in regions with surplus agricultural and forestry waste. However, transportation logistics and proper storage pose challenges for economic viability.

An interesting fact: wood chips are also used as feedstock for pellets, which have higher energy density and are exported to Europe. Pelletization adds value and simplifies handling but requires investment in drying and compression equipment.

Frequently Asked Questions

What are wood chips for biomass?

Wood chips are small pieces produced by shredding forestry residues such as branches, bark, and low-value trees. They are used as renewable fuel in boilers of thermal power plants.

How are wood chips used in biomass plants?

Wood chips are burned in boilers to generate steam, which drives turbines to produce electricity. Efficiency depends on moisture content; dry chips burn better and yield more energy.

What are the environmental benefits of using wood chips?

The main benefit is carbon neutrality: the CO₂ emitted during combustion is reabsorbed by new tree growth. It also utilizes waste that would otherwise be discarded, reducing environmental impact.