1894. Multiobjective Decision-Making for PET Bottle Recycling: A MILP-Based Approach for a Sustainable Circular Economy
Invited abstract in session WD-42: Recycling supply chains, stream Circular & Sustainable Supply Chains.
Wednesday, 14:30-16:00Room: Newlyn GR.02
Authors (first author is the speaker)
| 1. | Ali Zahedi
|
| Sustainable Smart Logistics Center, Tecnologico de Monterrey | |
| 2. | Eva Selene Hernández Gress
|
| Industrial Engineering, Tec de Monterrey | |
| 3. | José-Fernando Camacho-Vallejo
|
| Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey | |
| 4. | Mostafa Hajiaghaeikeshteli
|
| Tecnologico de Monterrey |
Abstract
The rapid increase in PET bottle consumption brings attention to proper reaction for production and consumption. In this talk, we focus on water PET bottles within Circular Supply Chain, aiming to study recycling PET destination (between close-loop and open-loop PET bottle recycling) to identify the most sustainable pathway in terms of material circularity, energy consumption, and cost-effectiveness. While close-loop recycling focuses on restoring PET bottle waste to new PET bottles, repurposing emphasizes creating new applications of PET bottle waste such as civil construction, 3D printing filament, and polyester fiber. A circular economy network is designed from the phase of PET bottle production from vPET (close-loop recycling) and four additional open-loop recycling models (bottle-to-polyester fiber, bottle-to-3D printing filament, and bottle-to-concrete). To examine the three indicators through a quantitative model, a mixed integer linear programming model with three objectives is proposed to minimize process cost, minimize energy consumption, and maximize material circulation. The model is solved by the Lp-metric method via CPLEX solver for a case study of 37 convenience shops determine the optimal recycling strategy under each cost-effectiveness, material circularity, and energy consumption preferences. Preliminary results highlight the trade-off between three preferences, serving as a reliable guide to move toward a sustainable circular economy for PET bottles.
Keywords
- Supply Chain Management
- Programming, Mixed-Integer
- Programming, Multi-Objective
Status: accepted
Back to the list of papers