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Electricity results from the movement of electrons that can be generated by movingan alternator. The driving force is generated by an internal combustion engine or aturbine driven by steam, by the combustion of bio-gas or bio-fuel. The driving forcethat drives the alternator can also be the wind or a stream of water.

Generating electricity with biomass?

Since electricity is derived from a motive force generated with steam or gas,biomass can be a raw material for its production. Any biomass can be used:

  • Solid biomass (wood, miscanthus, straw, etc.) can be burned to create steam
  • Fermentable biomasses (agricultural residues, livestock manure) can beconverted into biogas or bioethanol which will be used to power the engine orthe turbine
  • Oilseed biomass (rapeseed, sunfl ower) can produce oil (pure vegetable oil orbiodiesel) that will be used to power the engine

Power and Performance

Turbines are used for (very) large installations with power ranging from a fewmegawatts to several gigawatts. They are found in coal, gas, or nuclear power plantsand more recently in wood-fi red power plants.

Combustion engines have a lower power ranging from a few kilowatts to 1 to 2megawatts and require a liquid or gaseous fuel. They are used in small installationsand are very suitable for the decentralised production of electricity from biomass(pure vegetable oil, biogas).

Electricity generation yields are in the order of 25-45% depending on the type offuel, the power developed and the technology used.