Fossil fuels, such as coal and natural gas, are not considered biomass feedstocks because they are not derived from recently living organisms.

Gasification, pyrolysis, combustion, and anaerobic digestion are all processes used to convert biomass into a usable fuel.

Pyrolysis involves heating biomass in the absence of oxygen, resulting in the production of a variety of products, including bio-oil, charcoal, and gases.

Gasification involves the partial oxidation of biomass in the presence of a controlled amount of oxygen, resulting in the production of a gaseous mixture known as syngas.

Combustion involves the complete combustion of biomass in the presence of excess oxygen, resulting in the production of heat and carbon dioxide.

Anaerobic digestion involves the decomposition of organic matter by microorganisms in the absence of oxygen, resulting in the production of biogas (primarily methane and carbon dioxide).

Direct combustion power plants typically use wood as their primary feedstock due to its high energy density and availability.

Gasification power plants typically use agricultural residues as their primary feedstock due to their high cellulose content and suitability for gasification.

Anaerobic digestion power plants typically use animal manure as their primary feedstock due to its high organic content and suitability for anaerobic digestion.

Direct combustion power plants typically produce electricity directly from the combustion of biomass, using a boiler to generate steam that drives a turbine.

Gasification power plants typically produce electricity from the combustion of syngas, which is a gaseous mixture produced by the gasification of biomass.

Pyrolysis power plants typically produce electricity from the combustion of bio-oil, which is a liquid product produced by the pyrolysis of biomass.

Anaerobic digestion power plants typically produce electricity from the combustion of biogas, which is a gaseous mixture produced by the anaerobic digestion of biomass.

Biomass power plants typically have higher operating costs compared to fossil fuel power plants due to the need for specialized equipment and feedstock handling.

Biomass power plants typically have lower efficiencies compared to fossil fuel power plants due to the lower energy density of biomass and the inefficiencies associated with the conversion processes.