4.7 Article

Optimal strategy to sort plastic waste considering economic feasibility to increase recycling efficiency

Journal

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
Volume 165, Issue -, Pages 420-430

Publisher

ELSEVIER
DOI: 10.1016/j.psep.2022.07.022

Keywords

Plastic waste; Sorting; Recycling efficiency; Optimization

Funding

  1. National Research Foundation of Korea (NRF) - Korea government (MIST) [2021R1G1A1093355]
  2. Korean Institute of Industrial Technology [UR-22-0031, IR-210040, IZ-22-0049]
  3. Industry 4.0 application of SME for energy efficiency project [IR-22-0041, IZ-22-0051, UR-220030]
  4. National Research Foundation of Korea [2021R1G1A1093355] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

Ask authors/readers for more resources

This study proposes an optimal strategy for sorting plastic waste to improve recycling efficiency and reduce costs. Using a developed model, the optimal sorting strategy is identified and sensitivity analysis is conducted. The results show that the optimal strategy increases sorting efficiency by 4% and significantly reduces overall costs.
In this study, we suggested an optimal strategy to sort plastic waste to improve recycling efficiency considering economic feasibility. To derive the optimal sorting strategy, we developed a novel optimization model that considers the overall cost, which is sorting cost minus the revenue obtained by selling the recycling plastic from the sorting cost. Then we used the developed model to identify the optimal strategy to sort plastic waste in mixed-integer programming that minimizes the overall cost of plastic waste sorting systems. We also conducted a sensitivity analysis to analyze the extent to which the results obtained can change under different conditions. The optimization results, identify that the plastics in the optimal sorting strategy are of four types: LDPE, HDPE, PP, and PVC. This optimal sorting strategy increase the overall sorting efficiency slightly by 4 wt%, but considering the revenue obtained by selling the recycled plastic the strategy significantly decreased the overall sorting cost by 69.28 % compared to the conventional case. The developed model can determine the optimal strategy to sort plastic waste considering economic improvement. Therefore, the results allow increase in plastic recycling by minimizing the overall cost of the sorting system.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available