International Sugar Journal

Use of the life cycle assessment (LCA) for comparison of the environmental performance of four alternatives for the treatment and disposal of bioethanol stillage † [Full subscriber]

New alternative routes for the treatment and disposal of stillage should be proposed, as fertigation could become unfeasible, due to the increasing transport costs and environmental concerns. The aim of this paper is to show the results of the application of the Life Cycle Assessment methodology for the analysis and comparison of four alternatives for stillage treatment and disposal: conventional ‘in natura’ fertigation, anaerobic digestion, concentration until 40% for fertigation and concentration until 65% for combustion in boilers using fuel oil as supplementary fuel. For the LCA study, a hypothetic Standard Sugar and Alcohol Mill was assumed with a milling…

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