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Small-Scale Mechanical Recycling of Solid Plastic Wastes: A Review of PET, PEs, and PP

Preprints.org 2022 3 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Canice Chibuike Uzosike, Lachlan H. Yee, Ricardo Vásquez Padilla

Summary

This review examined small-scale mechanical recycling methods for polyethylene terephthalate and polyolefin plastics, evaluating the technical feasibility of reprocessing these materials at community or artisanal scales. The analysis identified key challenges including maintaining material quality through multiple processing cycles and contamination management. Improving small-scale recycling infrastructure could help reduce the volume of plastic waste that enters the environment and degrades into microplastics.

Mechanical recycling of solid plastic wastes on a small-scale level can be accomplished with the correct approaches. Thermoplastics are mostly considered for mechanical recycling because of their physical properties and ease of reprocessing. This paper reviews the mechanical reprocessing techniques of selected thermoplastics (polyethylene terephthalate and polyolefins) since they constitute a significant proportion of plastics used commercially. Furthermore, necessary considerations for effective operation of small-scale plants, including energy requirements of machinery and optimisation in order to improve efficiency and product quality, are discussed. A clearer understanding and addressing of the process-related challenges will lead to successful establishment and management of small-scale mechanical recycling facilities to benefit communities. Efficient small-scale mechanical reprocessing establishments have become essential in reducing the environmental impacts of solid plastic wastes and for energy conservation.

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