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Quality assessment of mixed plastic flakes from Waste Electrical and Electronic Equipment (WEEE) by spectroscopic techniques
Resources, Conservation and Recycling ( IF 13.2 ) Pub Date : 2020-03-16 , DOI: 10.1016/j.resconrec.2020.104801
Florian Wagner , Jef R. Peeters , Hans Ramon , Jozefien De Keyzer , Joost R. Duflou , Wim Dewulf

The quality of mechanically recycled plastics from WEEE is seen as one of the main bottlenecks for their re-application in high-quality products to enable a circular economy for these materials. Most literature focuses on the quality at the end of the value chain while significant potential to improve the performance of the entire value chain is seen by the quality assessment of input material of recyclers. In this research a testing procedure for mixed plastic flakes by Fourier-Transform InfraRed (FTIR) spectroscopy, X-Ray Fluorescence (XRF) and manual composition analysis assisted by computer vision. Mixed plastics from TV housings, washing machines, fridges and fridge drawers were taken as case studies. It is shown that unwanted plastic types, glass, metals, wood, rubber and foam as well as additives such as talc, calcium carbonate or brominated flame retardants can be detected by the procedure. In addition, a Failure Mode and Effect Analysis (FMEA) is shown to be a powerful tool for a risk-based assessment of the most relevant quality influences, which allows to define strategies for quality control. The economic evaluation showed that automation is required to allow the systematic use of the testing procedure.



中文翻译:

光谱技术评估废旧电气和电子设备(WEEE)中的混合塑料薄片的质量

WEEE的机械回收塑料的质量被视为将其重新应用于高品质产品的主要瓶颈之一,以使这些材料实现循环经济。多数文献关注价值链末端的质量,而对回收商投入材料的质量评估则显示出改善整个价值链绩效的巨大潜力。在这项研究中,通过傅立叶变换红外(FTIR)光谱,X射线荧光(XRF)和计算机视觉辅助的人工成分分析对混合塑料薄片进行测试的程序。电视外壳,洗衣机,冰箱和冰箱抽屉中的混合塑料作为案例研究。结果表明,不需要的塑料类型,玻璃,金属,木材,橡胶和泡沫以及滑石粉,可通过该程序检测碳酸钙或溴化阻燃剂。此外,故障模式和影响分析(FMEA)被证明是用于对最相关的质量影响进行基于风险的评估的强大工具,从而可以定义质量控制策略。经济评估表明,需要自动化才能系统地使用测试程序。

更新日期:2020-03-20
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