Biomass is one of the oldest and most widely used renewable source of energy. One of the most popular types of biomass is straw. In 2016 alone, the United States produced 134.78 million tons of straw, which was used most frequently as feed and breeding bedding. However, the remaining part can be used to produce heat.
For the power generation purposes, the straw harvested from the field, in the form of bales (round or cuboid) should be stored under a roof to avoid wetting. The boilers can burn only dry straw with the maximum moisture content up to 20%.