The origin of biomass
In the origin of biomass, a distinction is made between primary and secondary biomass flows. Primary biomass is formed by autotrophic organisms. These are plants, algae and certain bacteria. They are able to produce their mass through the use of solar energy in the process of photosynthesis. Secondary biomass is produced on the basis of the consumption of primary biomass, e.g., in animal production or as organic residual and waste streams.