Plant-based:
* Wood: This is a primary source, including wood chips, sawdust, bark, and forest residues.
* Agricultural residues: Straw, corn stover, rice husks, and other leftover plant materials after harvesting.
* Energy crops: Purposefully grown plants like switchgrass, miscanthus, and willow.
* Municipal solid waste: Paper, cardboard, yard waste, and food scraps.
Animal-based:
* Manure: From livestock, poultry, and other animals.
* Sewage sludge: A byproduct of wastewater treatment.
Other:
* Algae: A fast-growing renewable source of energy.
* Bioplastics: Made from renewable resources like cornstarch and are becoming a potential fuel source.
Common chemical components:
* Cellulose: A complex carbohydrate that makes up the cell walls of plants.
* Hemicellulose: Another carbohydrate, but simpler than cellulose.
* Lignin: A complex polymer that strengthens plant cell walls.
* Proteins: Found in animal and plant matter.
* Fats: Found in animal and plant matter.
* Moisture: Water content varies depending on the source.
Important to note:
* Ash: A byproduct of biomass combustion, often containing valuable minerals.
* Chemicals: Some biomass sources may contain impurities like pesticides or heavy metals that need to be considered.
The specific composition of biomass fuel will impact its energy content, combustion properties, and potential environmental impact.
