Abstract:
Hazardous waste management incorporates collection, separation, treatment, recycling and disposal of hazardous wastes. In this paper, a new multi-objective mixed integer model is presented for hazardous waste collection problem. The model aims to minimize transportation and construction costs, and environmental and population risks in hazardous waste management systems. This model is applied in a case study of Iran in order to help decision makers to decide on the location of separation, treatment, recycle, disposal centers, and established technology in treatment center. Moreover, this paper specifies routes between different facilities in collection network. For addressing population and environmental impacts and economical costs, three objective functions including total costs, total population exposure risk, and environmental risks are considered. An augmented ε-constraint method is used to generate Pareto optimal solution for these conflicting objectives. Finally, proposed model is utilized in our case study and numerical results and some managerial insights are provided.
Machine summary:
A New Multi-objective Mathematical Model for Hazardous Waste Management Considering Social and Environmental Issues Masoud Rabbani1, Saeed Danesh Shahraki1, Hamed Farrokhi-Asl2, Stanley Frederick W.
The model aims to minimize transportation and construction costs, and environmental and population risks in hazardous waste management systems.
The aim of this study is to find an optimal set of solutions that considers three objectives of the problem, and simultaneously to determine rational network of separation, treatment, recycle and disposal centers.
This model minimizes costs and system‘s risks by answering the questions such as how we can manage hazardous wastes, where to open separation centers, where to open treatment centers with special technology, which area is appropriate for establishing recycle centers and which zones have an environmental ability for opening disposal centers.
The main contribution of this paper is developing a multi-objective model with environmental, population and economic perspectives which separates hazardous wastes in separation sites and can be applied in realistic, large-scale problems.
As such, using separation centers, a different type of solving method, simultaneous consideration of population and environmental risks, and verification of presented model by applying it in real cases are the main contributions of this paper.
(View the image of this page) All in all, in this paper a new mathematical multi-objective mixed integer location/routing model with three objectives are developed and in addition to total cost, population and environmental risks are minimized.
The formulation is implemented in Iran, and considering various kinds of hazardous wastes and different types of technologies for treating them and using separation and recycling centers make this model so practical.