The use of plastic waste as resource gains more and more attention. In this context, material recycling is especially focused on packaging plastics. Further waste streams that contain a significant amount of plastics are mixed commercial and municipal solid waste. To assess the potential of plastics for recycling and energy recovery from these material streams large-scale experiments were conducted. The potential of mechanical pre-processing with the aim of generating a 3D-plastics pre-concentrate was assessed. The focus of these investigations was put on the relevance of the screening stage and its influence on down-stream material processing via ballistic separation and sensor-based sorting. Results demonstrate not only that the screening of both waste streams leads to enrichment of plastics in coarse particle size ranges (especially >80 mm) and transfer of contaminants, organics and minerals to fine fractions (especially <10 mm), but also that sensor-based sorting performance can be significantly enhanced due to cleaning effects on plastics, induced by the material circulation and the resulting interparticle friction in a drum screen. On the downside, the material rotation in a drum screen leads to tail-formation that can create plant down-time through clogging as well as material losses and impairment of pre-concentrates.

使用塑料废料作为资源越来越受到关注。在这种情况下，材料回收特别集中在包装塑料上。包含大量塑料的其他废物流是混合的商业和市政固体废物。为了评估塑料从这些物料流中回收和回收能源的潜力，进行了大规模实验。评估了以产生3D塑料预浓缩物为目标的机械预处理的潜力。这些研究的重点放在筛选阶段的相关性及其对通过弹道分离和基于传感器的分选对下游物料加工的影响。结果表明，不仅对两种废物流进行筛分都会导致粗粒度范围内的塑料富集（尤其是> 80毫米）并将污染物，有机物和矿物转移至细小颗粒（特别是<10毫米），而且由于材料循环和由此产生的颗粒间摩擦引起的对塑料的清洁效果，基于传感器的分拣性能也可以得到显着提高在鼓屏上。不利的一面是，转鼓筛中的物料旋转会导致形成尾部，这种尾部会由于堵塞以及物料损失和预浓缩物的损害而导致设备停机。