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Forskningsartikel2011Vetenskapligt granskad

Life cycle assessment of energy self-sufficiency systems based on agricultural residues for organic arable farms

Kimming, Marie; Sundberg, Cecilia; Nordberg, Åke; Baky, Andras; Bernesson, Sven; Norén, Olle; Hansson, Per-Anders

Sammanfattning

The agricultural industry today consumes large amounts of fossil fuels. This study used consequential life cycle assessment (LCA) to analyse two potential energy self-sufficient systems for organic arable farms, based on agricultural residues. The analysis focused on energy balance, resource use and greenhouse gas (GHG) emissions. A scenario based on straw was found to require straw harvest from 25% of the farm area: 45% of the total energy produced from the straw was required for energy carrier production and GHG emissions were reduced by 9% compared with a fossil fuel-based reference scenario. In a scenario based on anaerobic digestion of ley, the corresponding figures were 13%, 24% and 35%. The final result was sensitive to assumptions regarding, e.g., soil carbon content and handling of by-products. (C) 2010 Elsevier Ltd. All rights reserved.

Nyckelord

LCA; Agricultural residues; Energy self-sufficiency; Organic farming

Publicerad i

Bioresource Technology
2011, Volym: 102, nummer: 2, sidor: 1425-1432
Utgivare: ELSEVIER SCI LTD