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首页> 外文期刊>Journal of Polymers and the Environment >Life Cycle Impact Assessment of Polylactic Acid (PLA) Produced from Sugarcane in Thailand
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Life Cycle Impact Assessment of Polylactic Acid (PLA) Produced from Sugarcane in Thailand

机译：泰国甘蔗生产的聚乳酸（PLA）的生命周期影响评估

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In this study we provide up-to-date cradle-to-gate information on the environmental footprint of polylactic acid (PLA) produced in Thailand at commercial scale, covering emerging topics such as water footprint and direct land use change. The enormous potential to further reduce the environmental impacts of PLA through improvements in feedstock production as well as in the PLA manufacturing process is also demonstrated. Life cycle assessment (LCA) is performed according to the ISO 14040/44 standard methodology. The 16 environmental impact categories from ILCD 2011 Midpoint+were considered for the hotspot analysis. As primary data actual industrial data were used for the sugar production, lactic acid production (Corbion) and PLA production (Total Corbion PLA), including various recently developed process insights. The agricultural feedstock production and the manufacturing process of PLA from sugar contributed most to the LCA impacts of PLA production. The sugarcane crop production particularly affected the environmental impact categories analyzed, including global warming potential (GWP), water, eutrophication, acidification, particulate matter and, inevitably, land use. However, when combined with the results of a sustainability risk assessment study, it becomes clear that land use and water-related impacts represent a low risk for the feedstock-sourcing area. The environmental impact categories of PLA manufacturing are mostly linked to energy and chemicals usage. Improvements in the environmental performance of PLA can be achieved through improvements in the sugarcane farming practices, higher efficiency bagasse boilers at the sugarmill, reduced usage of auxiliary chemicals and increased usage of renewable energy in the conversion process of sugar to PLA. From a cradle-to-gate perspective, considering the uptake of carbon dioxide in the PLA molecule, the GWP is 501 kg CO2 eq/ton PLA.
机译：在这项研究中，我们提供了有关在泰国以商业规模生产的聚乳酸（PLA）的环境足迹的最新信息，涵盖了诸如水足迹和直接土地利用变化等新兴主题。还展示了通过改善原料生产以及PLA制造工艺来进一步降低PLA的环境影响的巨大潜力。生命周期评估（LCA）根据ISO 14040/44标准方法进行。热点分析考虑了ILCD 2011 Midpoint +中的16种环境影响类别。作为主要数据，实际的工业数据用于制糖，乳酸生产（Corbion）和PLA生产（Total Corbion PLA），包括各种最新开发的过程见解。农业原料生产和糖生产PLA的过程对LCA产生的LCA影响最大。甘蔗作物的产量特别影响了所分析的环境影响类别，包括全球变暖潜能值（GWP），水，富营养化，酸化，颗粒物以及不可避免的土地利用。但是，结合可持续性风险评估研究的结果，很明显，土地使用和与水有关的影响对原料采购区域的风险很小。 PLA制造的环境影响类别主要与能源和化学品的使用有关。通过改善甘蔗种植方式，提高糖厂的蔗渣锅炉效率，减少辅助化学药品的使用以及在糖转化为PLA的过程中增加可再生能源的使用，可以实现PLA的环境绩效的改善。从摇篮到大门的角度，考虑到PLA分子中二氧化碳的吸收，GWP为501 kg CO2当量/吨PLA。

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