Master¬īs Thesis 2009


Large scale aerobic composting of sourceseparated organic wastes: A comparative study of environmental impacts, costs, and contextual effects
Rob van Haaren
This thesis describes research conducted to identify the best available technology for processing source‚Äźseparated organic wastes, by means of a multi‚Äźcriteria analysis (MCA): a) Environmental impact, b) cost, c) land area required, d) odor control and e) feedstock flexibility. A Life‚ÄźCycle Analysis (LCA) assessed the environmental impacts of each process. In conjunction with the financial and contextual (e.g., odor control) aspects that were examined in this study, this LCA compared four methods for disposing organic wastes: Three aerobic composting methods (windrow composting, aerated static pile, and in‚Äźvessel composting) and the use of yard wastes as Alternative Daily Cover (ADC) on a landfill. These methods were rated for each criterion and individual dominance scores were generated, using case‚Äźspecific weighting factors for each criterion. As a result, a decision making model was created that can help communities and waste management companies in choosing the appropriate technology for a particular situation.
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