Abstract
The aim of this study was to investigate and analyze the separation process of poly (ethylene terephthalate) and high-density polyethylene mixture. The research studied the influence of parameters of tribocharging and separation processes on the quality of separation. The research was carried out using a developed test stand consisting of a test tribocharger and a dedicated drum-type electrostatic separator. Both the separator and the tribocharger have been designed as automated test benches to assess the quality of plastic separation. In order to assess the quality of electrostatic separation of plastics, an original method based on the use of a dedicated vision system was used. The research was conducted in two stages. Firstly, the influence of the tribocharging process parameters on the efficiency of the process, i.e., the charge collected, was investigated. The next stage of the research was focused on the analysis of the influence of the separation process parameters on its effectiveness. The obtained results were presented and discussed. On the basis of the conducted research, the parameters of the tribocharging and separation processes affecting their effectiveness were determined.
Highlights
The current technological progress and today’s lifestyle make plastics indispensable materials
The total demand for European plastics converters is around 58 million tons compared to 368 million tons worldwide
PET (Poly(Ethylene Terephthalate)) and PE-HD (Highdensity Polyethylene), used in the production of plastic bottles were used in the study
Summary
The current technological progress and today’s lifestyle make plastics indispensable materials. Because they are inexpensive, very functional, lightweight, hygienic plastic become crucial in industrial and commercial applications in many areas [1]. The world production of plastics over the last decades has increased significantly. With the increase in production, and due to the large variety of types of plastic, the amount of waste grows dramatically [2]. In Europe, post-consumer waste reaches over 29 million tons. The total demand for European plastics converters is around 58 million tons compared to 368 million tons worldwide. The EU average percentage ratio of recycling in plastic packaging reaches only 42% [3,4].
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