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首页> 外文期刊>The International Journal of Life Cycle Assessment >Comparative life cycle assessment and social life cycle assessment of used polyethylene terephthalate (PET) bottles in Mauritius
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Comparative life cycle assessment and social life cycle assessment of used polyethylene terephthalate (PET) bottles in Mauritius

机译:毛里求斯使用过的聚对苯二甲酸乙二醇酯(PET)瓶的比较生命周期评估和社会生命周期评估

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摘要

Purpose Improper disposal of used polyethylene terephthalate (PET) bottles constitute an eyesore to the environmental landscape and is a threat to the flourishing tourism industry in Mauritius. It is therefore imperative to determine a suitable disposal method of used PET bottles which not only has the least environmental load but at the same time has minimum harmful impacts on peoples employed in waste disposal companies. In this respect, the present study investigated and compared the environmental and social impacts of four selected disposal alternatives of used PET bottles. Methods Environmental impacts of the four disposal alternatives, namely: 100 % landfilling, 75 % incineration with energy recovery and 25 % landfilling, 40 % flake production (partial recycling) and 60 % landfilling and 75 % flake production and 25 % landfilling, were determined using ISO standardized life cycle assessment (ISO 14040:2006) and with the support of SimaPro 7.1 software. Social life cycle assessments were performed based on the UNEP/ SETAC Guidelines for Social Life Cycle Assessment of products. Three stakeholder categories (worker, society and local community) and eight sub-category indicators (child labour, fair salary, forced labour, health and safety, social benefit/social security, discrimination, contribution to economic development and community engagement) were identified to be relevant to the study. A new method for aggregating and analysing the social inventory data is proposed and used to draw conclusions. Results and discussion Environmental life cycle assessment results indicated that highest environmental impacts occurred when used PET bottles were disposed by 100 % landfilling while disposal by 75 % flake production and 25 % landfilling gave the least environmental load. Social life cycle assessment results indicated that least social impacts occurred with 75 % flake production and 25 % landfilling. Thus both E-LCA and S-LCA rated 75 % flake production and 25 % landfilling to be the best disposal option. Conclusions Two dimensions of sustainability (environmental and social) when investigated using the Life Cycle Management tool, favoured scenario 4 (75 %% flake production and 25 % landfilling) which is a partial recycling disposal route. One hundred percent landfilling was found out to be the worst scenario. The next step will be to explore the third pillar of sustainability, economic, and devise a method to integrate the three dimensions with a view to determine the sustainable disposal option of used PET bottles in Mauritius.
机译:目的不正确处理用过的聚对苯二甲酸乙二酯(PET)瓶构成环境景观的麻烦,并且对毛里求斯蓬勃发展的旅游业构成威胁。因此,有必要确定一种合适的旧PET瓶处理方法,该方法不仅具有最小的环境负荷,而且同时对废物处理公司所雇用的人员的有害影响最小。在这方面,本研究调查并比较了四种选择的旧PET瓶处理替代品对环境和社会的影响。方法确定了四种处置方法对环境的影响,分别为:100%垃圾填埋,75%的能量回收焚烧和25%垃圾填埋,40%的薄片生产(部分回收)和60%的垃圾填埋,75%的薄片生产和25%的垃圾填埋使用ISO标准化生命周期评估(ISO 14040:2006)并在SimaPro 7.1软件的支持下进行。社会生命周期评估是根据环境署/ SETAC产品社会生命周期评估指南进行的。确定了三个利益相关者类别(工人,社会和地方社区)和八个子类别指标(童工,公平工资,强迫劳动,健康与安全,社会福利/社会保障,歧视,对经济发展的贡献和社区参与)。与研究有关。提出了一种汇总和分析社会库存数据的新方法,并以此得出结论。结果与讨论环境生命周期评估结果表明,对用过的PET瓶进行100%填埋处理时,对环境的影响最大,而对75%的薄片生产和25%的填埋处理则对环境的影响最小。社会生命周期评估结果表明,对社会的影响最小,薄片产量为75%,垃圾填埋为25%。因此,E-LCA和S-LCA均将薄片产量定为75%,将垃圾填埋定为25%,是最佳的处置选择。结论当使用生命周期管理工具进行调查时,可持续性的两个维度(环境和社会的)是方案4(片状产品的生产占75%,堆填区占25%),这是部分回收处理路线。发现最坏的情况是填埋百分百。下一步将探索可持续性,经济性的第三大支柱,并设计一种方法来整合这三个方面,以便确定毛里求斯使用过的PET瓶的可持续处置方案。

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