Hammer mill operating and biomass physical conditions .
WEBNov 1, 2014 · 1. Introduction. The European Commission established the "202020" targets in order to achieve in 2020 a greenhouse gas emission reduction by 20%, a renewable energy contribution of 20% on the final energy consumption and an increase of the energy efficiency by the 20% [1].In this context, biomass should play a key role due to its huge .