Department of Processing and Recycling (I.A.R.), RWTH Aachen University, Germany.
Waste Manag Res. 2019 Feb;37(2):120-126. doi: 10.1177/0734242X19826372. Epub 2019 Jan 24.
In Germany, only approximately 30% by mass of plastics from lightweight packaging waste is recycled; 65% by mass is transferred to inferior residual fractions (sorting residue and mixed plastics), which are currently only utilized thermally. An increase in the recycling of valuable resources in the sense of material recycling would both contribute to the saving of resources and improve the economic situation of plant operators. It is generally known from operating and planning experience that fluctuation in the amount of material loaded into the sorting process is one of the main reasons for suboptimal recycling quotas. In particular, overfilling in the input stream leads to a deterioration of the separation result of the entire process. A novel process control concept envisages equalizing the material flow in such a way that all separation steps are operated in the intended design range. For the example of a lightweight packaging treatment process, the requirements and technological solutions for a sensor-based process control concept will be presented.
在德国，只有大约 30%质量的轻包装废物塑料被回收；65%质量的塑料被转移到低质量的剩余部分（分类残余物和混合塑料），这些塑料目前仅被热利用。在物质回收的意义上增加有价值资源的回收，将有助于节约资源并改善工厂运营商的经济状况。从运行和规划经验中普遍知道，装入分类过程的材料数量的波动是造成回收配额不理想的主要原因之一。特别是在输入流中过度填充会导致整个过程的分离效果恶化。一个新颖的过程控制概念设想以这样的方式使物料流均衡，即所有分离步骤都在预期的设计范围内运行。以轻包装处理过程为例，将介绍基于传感器的过程控制概念的要求和技术解决方案。
