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首页> 外文期刊>Environmental Science & Technology >Climate Change Implications of Bio-Based and Marine-Biodegradable Plastic: Evidence from Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)
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Climate Change Implications of Bio-Based and Marine-Biodegradable Plastic: Evidence from Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)

机译：生物基础和海洋生物降解塑料的气候变化影响：来自聚（3-羟基丁酸酯-CO-3-羟基己酸酯的证据）

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摘要

Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), PHBH or PHBHHx, is a novel bio-based polymer that is biodegradable in both soil and marine environments. While bio-based and biodegradability are often celebrated features to mitigate environmental problems of plastics, their life cycle environmental impacts contain uncertainties that are yet to be fully understood. To develop effective introduction schemes for PHBH, this study assessed the life cycle climate change implications of PHBH. We computed the life cycle greenhouse gas emissions (GHG) and fossil resource consumption of produce bags and spoons composed of PHBH and their fossil-based alternatives based on industrial-scale data. The products were assessed against 10 end-of-life scenarios for commercial plastics. As a result, the cradle-to-gate GHG of PHBH ranged between 0.32 and 16.5 kgCO_2e/kg-PHBH depending on the land-use change assumed for the biomass production. The product-based comparative analysis presented that PHBH spoons have lower cradle-to-grave GHG emissions over their fossil-based alternatives but not with produce bags because PHBH spoons have a smaller GHG per functional unit than that of its fossil counterpart. The end-of-life scenario analysis conveyed that PHBH should be introduced to a region with a plastic waste management system that avoids methane generation and facilitates energy recovery.
机译：聚（3-羟基丁酸酯-CO-3-羟基己酸酯），PHBH或PHBHHX是一种新型生物基聚合物，可在土壤和海洋环境中生物降解。虽然生物的基础和生物降解性通常是庆祝的特征来缓解塑料的环境问题，但它们的生命周期环境影响包含尚未完全理解的不确定性。本研究评估了PHBH的有效介绍方案，评估了PHBH的生命周期气候变化影响。我们计算了由PHBH及其化石的替代品组成的生产袋和勺子的生命周期温室气体排放（GHG）和化石资源消耗。该产品评估了10个用于商业塑料的生活终端情景。结果，根据生物质生产假设的土地使用变化，PHBH的摇篮到栅极温室气体的范围为0.32和16.5kgco_2e / kg-phbh。基于产品的比较分析表明，PHBH勺子在其化石的替代品上具有较低的摇篮 - 严重的温室气体排放，而是没有生产袋，因为PHBH勺子具有比其化石对应的较小温室气体。寿命终止情景分析传达给PHBH的塑料废物管理系统应避免甲烷生成，促进能量回收。

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  • 来源
    《Environmental Science & Technology》 |2021年第5期|3380-3388|共9页
  • 作者

    Eri Amasawa; Tomoki Yamanishi; Jun Nakatani; Masahiko Hirao; Shunsuke Sato;

  • 作者单位

    Department of Chemical System Engineering Graduate School of Engineering The University of Tokyo Tokyo 113-8656 Japan;

    Department of Chemical System Engineering Graduate School of Engineering The University of Tokyo Tokyo 113-8656 Japan;

    Department of Urban Engineering Graduate School of Engineering The University of Tokyo Tokyo 113-8656 Japan;

    Department of Chemical System Engineering Graduate School of Engineering The University of Tokyo Tokyo 113-8656 Japan;

    Bioproducts Research Group Biotechnology Research Laboratories Pharma & Supplemental Nutrition Solutions Vehicle Kaneka Corporation Takasago Hyogo 676-8688 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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