A Review of Sorting and Separating Technologies Suitable for Compostable and Biodegradable Plastic Packaging
A Review of Sorting and Separating Technologies Suitable for Compostable and Biodegradable Plastic Packaging
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DOI：
10.3389/frsus.2022.901885
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Nutcha Taneepanichskul;Danielle Purkiss;M. Miodownik
中科院分区：
文献类型：
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作者：
Nutcha Taneepanichskul;Danielle Purkiss;M. Miodownik
由于公众压力和政府立法要求减少塑料废物，传统塑料替代品的生产和使用急剧增加，包括可堆肥和可生物降解塑料。如果这些塑料不单独收集，它们可能会污染塑料回收，有机废物流和环境。为了处理这种污染，需要对这些不同的聚合物类型进行有效的识别和分类，以确保它们在寿命结束时被分离和堆肥。本文综述了可用于分类可堆肥和生物降解塑料的识别和分类技术，包括重力分类、浮选分类、摩擦静电分类、图像分类、光谱分类、高光谱成像和示踪分类。在循环经济的框架内讨论了每种排序方法的优点和局限性。
As a result of public pressure and government legislation to reduce plastic waste there has been a sharp rise in the manufacture and use of alternatives to conventional plastics including compostable and biodegradable plastics. If these plastics are not collected separately, they can contaminate plastic recycling, organic waste streams, and the environment. To deal with this contamination requires effective identification and sorting of these different polymer types to ensure they are separated and composted at end of life. This review provides the comprehensive overview of the identification and sorting technologies that can be applied to sort compostable and biodegradable plastics including gravity-based sorting, flotation sorting, triboelectrostatic sorting, image-based sorting, spectral based sorting, hyperspectral imaging and tracer-based sorting. The advantages and limitations of each sorting approach are discussed within a circular economy framework.