Life cycle assessment of bagasse waste management options |
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| Authors: | Worapon Kiatkittipong Porntip Wongsuchoto Prasert Pavasant |
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| Institution: | 1. Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000, Thailand;2. National Center of Excellence for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok 10330, Thailand;3. Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;1. Aristotle University of Thessaloniki, Greece;2. University of Thessaly, Greece;3. National Technical University of Athens, Greece;1. Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH, Torgauer Straße 116, 04347 Leipzig, Germany;2. Faculty of Agricultural and Environmental Sciences, Department of Waste Management, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, Germany;3. Department of Environmental Microbiology, Helmholtz Centre for Environmental Research – UFZ, Permoserstraße 15, 04318 Leipzig, Germany;4. Laboratório de Remediação Ambiental, Universidade do Vale do Itajaí, Rua Uruguai 458, 88302-202 Itajaí, Brazil;1. Energy Planning Programe, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil;2. Brazilian Studies Research, King’s College London, King’s Brazil Institute, Norfolk Building, Strand London, London WC2R 2LS, UK;1. Department of Mechanical and Materials Engineering, Military Institute of Engineering, Praça General Tibúrcio, 80, Rio de Janeiro 22290-270, RJ, Brazil;2. Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI 49931, USA;1. School of Chemical Engineering, University of Campinas, Campinas, Brazil;2. CECS, Federal University of ABC (UFABC), Santo André, Brazil;1. School of Engineering & Science, Curtin University Sarawak, CDT 250 Miri, Sarawak 98009, Malaysia;2. School of Business, Curtin University Sarawak, CDT 250 Miri, Sarawak 98009, Malaysia;1. Federal University of Rio Grande do Norte (UFRN), Department of Mechanical Engineering, Brazil;2. Federal University of Paraíba (UFPB), Department of Renewable Energy Engineering, Brazil |
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| Abstract: | Bagasse is mostly utilized for steam and power production for domestic sugar mills. There have been a number of alternatives that could well be applied to manage bagasse, such as pulp production, conversion to biogas and electricity production. The selection of proper alternatives depends significantly on the appropriateness of the technology both from the technical and the environmental points of view. This work proposes a simple model based on the application of life cycle assessment (LCA) to evaluate the environmental impacts of various alternatives for dealing with bagasse waste. The environmental aspects of concern included global warming potential, acidification potential, eutrophication potential and photochemical oxidant creation. Four waste management scenarios for bagasse were evaluated: landfilling with utilization of landfill gas, anaerobic digestion with biogas production, incineration for power generation, and pulp production. In landfills, environmental impacts depended significantly on the biogas collection efficiency, whereas incineration of bagasse to electricity in the power plant showed better environmental performance than that of conventional low biogas collection efficiency landfills. Anaerobic digestion of bagasse in a control biogas reactor was superior to the other two energy generation options in all environmental aspects. Although the use of bagasse in pulp mills created relatively high environmental burdens, the results from the LCA revealed that other stages of the life cycle produced relatively small impacts and that this option might be the most environmentally benign alternative. |
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