Life Cycle Assessment of high ligno-cellulosic biomass pyrolysis coupled with anaerobic digestion.
A Life Cycle Assessment is conducted on pyrolysis coupled to anaerobic digestion to treat corn stovers and to obtain bioenergy and biochar. The analysis takes into account the feedstock treatment process, the fate of products and the indirect effects due to crop residue removal. The biochar is considered to be used as solid fuel for coal power plants or as soil conditioner. All results are compared with a corresponding fossil-fuel-based scenario. It is shown that the proposed system always enables relevant primary energy savings of non-renewable sources and a strong reduction of greenhouse gases emissions without worsening the abiotic resources depletion. Conversely, the study points out that the use of corn stovers for mulch is critical when considering acidification and eutrophication impacts. Therefore, removal of corn stovers from the fields must be planned carefully.
CIRI Energia e Ambiente, U.O. Biomasse, Alma Mater Studiorum - University of Bologna, via S. Alberto 163, 48123 Ravenna, Italy; Department of Physics, Alma Mater Studiorum - University of Bologna, viale Pichat 6/2, 40127 Bologna, Italy. Electronic address: serena.righi2@unibo.it.
Serena
S
Righi
CIRI Energia e Ambiente, U.O. Biomasse, Alma Mater Studiorum - University of Bologna, via S. Alberto 163, 48123 Ravenna, Italy.
Vittoria
V
Bandini
CIRI Energia e Ambiente, U.O. Biomasse, Alma Mater Studiorum - University of Bologna, via S. Alberto 163, 48123 Ravenna, Italy.
Diego
D
Marazza
CIRSA Centro Interdipartimentale di Ricerca per le Scienze Ambientali, Alma Mater Studiorum - University of Bologna, via dell'Agricoltura 5, 48123 Ravenna, Italy.
Filippo
F
Baioli
CIRI Energia e Ambiente, U.O. Biomasse, Alma Mater Studiorum - University of Bologna, via S. Alberto 163, 48123 Ravenna, Italy.
Cristian
C
Torri
CIRI Energia e Ambiente, U.O. Biomasse, Alma Mater Studiorum - University of Bologna, via S. Alberto 163, 48123 Ravenna, Italy; Department of Physics, Alma Mater Studiorum - University of Bologna, viale Pichat 6/2, 40127 Bologna, Italy.
Andrea
A
Contin
D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods; D002606:Charcoal / Q000737:chemistry; D003031:Coal; D004777:Environment; D008031:Lignin / Q000737:chemistry; D011210:Power Plants; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil; D003313:Zea mays / Q000737:chemistry
D056804:Biofuels; D003031:Coal; D012987:Soil; C540010:biochar; C036909:lignocellulose; D002606:Charcoal; D008031:Lignin
Biochar; Bioenergy; Crop residue; Hybrid thermochemical processing; Trade-off