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Types of system
There are many different ways of using biomass for energy, and the form and properties of the biomass, together with the needs of the user, will determine which are the most appropriate.
Stoves and boilers
Combustion devices to provide heat to the room in which they stand (stoves) or into water (boilers). These can be anything from very simple box stoves of a few kW output, to highly sophisticated boilers capable of heating an entire housing development via a district heating scheme, and with an output of perhaps a MW or more.
Anaerobic digestion
Forms of biomass with a high moisture content are less well suited to combustion, but may be appropriate for anaerobic digestion. This biological process produces a biobas of predominantly methane (CH3) and CO2. This can be burned for heat, used to power an internal combustion engine for combined heat and power (CHP) or purified (upgraded) compressed and used for conventional natural gas applications including transport.