3. Wood energy recovery

The current trend in energy recovery is as follows:

• directly in combustion from the individual scale to the scale of biomass power plants consuming up to 1 mm ³ of wood per year, with wood pellets as fuel;

• in synthetic natural gas (SNG) injected into the natural gas distribution network;

• into biofuels, or rather hydrocarbon agrofuels or alcohols.

Biofuels or agrofuels, once considered "miracle products", are now being challenged as competing with food production. For this reason, second-generation biofuels are now being developed from lignocellulosic products derived from forestry by-products.

A distinction is made between first-generation agrofuels, derived mainly from...