Environmental Sustainability of Sweet-Sorghum Hybrids Biorefinery Complex

G. Grassi & A. Salimbeni
New sweet sorghum hybrids are promising multifunctional energy crops and the most photosynthetic efficient terrestrial biomass crops. Especially in tropical regions, sorghum hybrids by two cycles/year approach the annual productivity of micro-algae that reach sometimes a 6% of photosynthetic efficiency. In fact, for sweet sorghum numerous experimental trials anticipate yields of 180 fresh tons/ha per year. The exploitation of such crop for the coproduction of several bulk energy products (i.e. bioethanol; power/heat; agro pellets; biogas/compost;...