Abstract
Technology progress is a cause of industrial hazardous wastes increasing in the whole world . Management of hazardous waste is a significant issue due to the imposed risk on environment and human life. This risk can be a result of location of undesirable facilities and also routing hazardous waste. In this paper a biobjective mixed integer programing model for location-routing industrial hazardous waste with two objectives is developed. First objective is total cost minimization including transportation cost, operation cost, initial investment cost, and cost saving from selling recycled waste. Second objective is minimization of transportation risk. Risk of population exposure within bandwidth along route is used to measure transportation risk. This model can help decision makers to locate treatment, recycling, and disposal centers simultaneously and also to route waste between these facilities considering risk and cost criteria. The results of the solved problem prove conflict between two objectives. Hence, it is possible to decrease the cost value by marginally increasing the transportation risk value and vice versa. A weighted sum method is utilized to combine two objectives function into one objective function. To solve the problem GAMS software with CPLEX solver is used. The problem is applied in Markazi province in Iran.
Highlights
The harmful wastes are produced from industries, manufacturers, hospitals, and other sectors which have harmful health effect on human and environment
The frame work of our model is close to the Alumur and Kara [19] and Samanlioglu [2]; they proposed a multiobjective model to location-routing hazardous waste
This assay attempts to develop a multiobjective model to locating-routing industrial hazardous waste with two objectives; for this reason the appropriate sites are selected to related facilities by geographical information system (GIS) tool based on important criteria, the weighted sum method is utilized to solve model and find efficient solution of Pareto frontier
Summary
The harmful wastes are produced from industries, manufacturers, hospitals, and other sectors which have harmful health effect on human and environment. Hazardous material is divided into four subgroups based on their features: toxicity (e.g., barium, cadmium, and chloroform); reactivity (e.g., sulfides and peroxide formers); corrosiveness (acids and bases); and ignitability (e.g., flammable liquid, oxidizers) These materials need specific transporting and treating to reduce their effect on environment and human health. Recycling waste is an important stage in waste management [2], but this stage is often ignored in the literature In this model locations for recycling centers are considered. Using total cost and transportation risk as objectives for this model can help decision makers to have a good tradeoff between environmental and economic aspects In this way, using operational cost parameter for each facility and cost saving parameter for recycled hazardous waste are suggested to have a more comprehensive cost objective.
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