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Recycling of Bioplastics: Routes and Benefits

机译:生物塑料的回收:路线和福利

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摘要

Continual reduction of landfill space along with rising CO(2)levels and environmental pollution, are global issues that will only grow with time if not correctly addressed. The lack of proper waste management infrastructure means gloablly commodity plastics are disposed of incorrectly, leading to both an economical loss and environmental destruction. The bioaccumulation of plastics and microplastics can already be seen in marine ecosystems causing a negative impact on all organisms that live there, ultimately microplastics will bioaccumulate in humans. The opportunity exists to replace the majority of petroleum derived plastics with bioplastics (bio-based, biodegradable or both). This, in conjunction with mechanical and chemical recycling is a renewable and sustainable solution that would help mitigate climate change. This review covers the most promising biopolymers PLA, PGA, PHA and bio-versions of conventional petro-plastics bio-PET, bio-PE. The most optimal recycling routes after reuse and mechanical recycling are: alcoholysis, biodegradation, biological recycling, glycolysis and pyrolysis respectively.
机译:垃圾填埋场的持续降低以及升高的CO(2)水平和环境污染,是全球性问题,如果没有正确解决,只会随着时间的增长而增长。缺乏适当的废物管理基础设施意味着Gloably商品塑料被错误地处理,导致经济损失和环境破坏。在海洋生态系统中可能已经看到塑料和微塑料的生物累积,从而导致在那里的所有生物体产生负面影响,最终微薄的微薄将在人类中生物累积。存在机会,以取代大多数石油衍生塑料的生物塑料(生物基,可生物降解或两者)。这与机械和化学回收结合使用是一种可再生和可持续的解决方案,可以帮助减轻气候变化。本综述涵盖了传统的石油塑料生物PET,BIO-PE的最有前途的生物聚合物PLA,PGA,PHA和生物版本。重用和机械回收后最佳的回收途径是:醇解,生物降解,生物回收,糖酵解和热解。

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