The European directive on renewable sources defines as biomass “the biodegradable fraction of products, waste and residues from agriculture – including vegetal and animal substances – forestry and related industries, as well as the biodegradable fraction of industrial and municipal waste”.
Forest and vegetal biomasses consisting of wastes of vegetal origin are a source of renewable and ecologic energy extremely diffused on the territory. Their disposal, which in the past was a cost to be born, today has turned into an opportunity for the production of electrical energy. Even more boosted opportunity when the biomass provisioning occurs by turning to the local one, with the consequent knocking down of costs and pollution due to transport.
The combustion of biomasses allows a null balance of CO2 emissions into the atmosphere. This is possible because the quantity of carbon dioxide emitted by the wood combustion is exactly the same assimilated by the tree during its growth but also because it corresponds to that freed by the putrefaction of the plants abandoned in woods.
Biomass power plants, whose combustion is fed by wood material of forestry and agricultural origin, reproduce on industrial scale the same process that happens in domestic chimneys. With the advantage provided by the installation of adequate filters that keep ashes preventing their diffusion into the atmosphere.
Besides, the latter are an absolutely natural product, which finds an excellent use in agriculture as fertilizer.