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首页> 外文期刊>Journal of Cleaner Production >Steps towards more environmentally sustainable municipal solid waste management - A life cycle assessment study of Sao Paulo, Brazil
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Steps towards more environmentally sustainable municipal solid waste management - A life cycle assessment study of Sao Paulo, Brazil

机译：迈向更具环境可持续性的城市固体废物管理的步骤-巴西圣保罗的生命周期评估研究

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Landfill disposal has thus far been the predominant treatment method for municipal solid waste (MSW) throughout Brazil, including Sao Paulo city. Environmentally sustainable development of MSW management in Sao Paulo necessitates a stepwise reduction of landfilling. However, ever increasing MSW generation poses the challenge of managing increasing MSW volumes while simultaneously modernizing the MSW management system. In this study, the environmental impacts of the current MSW management system and future alternatives in the city were assessed by means of life cycle assessment (LCA) to determine a pathway towards more environmentally sustainable MSW management. The assessed impact categories were global warming, acidification and eutrophication potentials. Potential future alternatives included the stepwise reduction of landfilling by the introduction of composting, anaerobic digestion and mechanical-biological treatment (MBT). The results of the study indicated that the environmental impacts of MSW management in Sao Paulo can be most effectively diminished by anaerobic digestion of source separated organic waste and MBT of MSW, on condition that the produced refuse-derived fuel (RDF) is utilized in cement production as a substitute for coal. The other utilization option for RDF, incineration, would increase the environmental impacts of MSW management due to the low amount of avoided emissions resulting from electricity substitution since average electricity production in Brazil is dominated by hydropower. Sensitivity analyses indicated, however, that the environmental impacts of incineration might decrease with different modeling assumptions, e.g. the modeling assumption regarding the kind of electricity production substituted by electricity production from MSW. Nevertheless, the main findings of the study remained the same and they are in line with the previous literature. (C) 2018 The Authors. Published by Elsevier Ltd.
机译：迄今为止，垃圾掩埋一直是包括圣保罗在内的整个巴西城市生活垃圾（MSW）的主要处理方法。圣保罗城市生活垃圾管理的环境可持续发展需要逐步减少垃圾填埋场。但是，不断增加的MSW产生带来了管理不断增加的MSW量同时实现MSW管理系统现代化的挑战。在这项研究中，通过生命周期评估（LCA）评估了当前城市生活垃圾管理系统和城市未来替代方案对环境的影响，以确定实现更环境可持续的城市生活垃圾管理的途径。评估的影响类别为全球变暖，酸化和富营养化的潜力。未来可能的替代方案包括通过引入堆肥，厌氧消化和机械生物处理（MBT）逐步减少垃圾填埋场。研究结果表明，在产生的垃圾衍生燃料（RDF）用于水泥的条件下，通过厌氧消化源分离的有机废物和垃圾的MBT，可以最有效地减轻圣保罗MSW管理对环境的影响。生产来替代煤炭。 RDF的另一种利用选择是焚化，这将增加城市固体废弃物管理对环境的影响，因为巴西替代电力所产生的可避免排放量很小，因为巴西的平均电力生产以水力发电为主。但是，敏感性分析表明，焚烧对环境的影响可能会随着不同的建模假设而降低，例如关于用MSW的电力生产替代电力生产类型的建模假设。尽管如此，该研究的主要发现仍然是相同的，并且与以前的文献一致。 （C）2018作者。由Elsevier Ltd.发布

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