Author(s): Kimming M, Sundberg C, Nordberg A, Baky A, Bernesson S,
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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. Copyright Â© 2010 Elsevier Ltd. All rights reserved.
This article was published in Bioresour Technol
and referenced in Innovative Energy & Research