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  • Title: Life cycle assessment of energy self-sufficiency systems based on agricultural residues for organic arable farms.
    Author: Kimming M, Sundberg C, Nordberg A, Baky A, Bernesson S, Norén O, Hansson PA.
    Journal: Bioresour Technol; 2011 Jan; 102(2):1425-32. PubMed ID: 20970998.
    Abstract:
    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.
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