Modeling of the Waste Recycling Logistics Systems

Nowadays, optimization solutions within the area of waste recycling are becoming more actual. The main reason for this is that the volume of waste formed by the households is increasing annually, while the current waste recycling systems are not being updated at the same pace. The modelling of optimal waste recycling logistics system aimed to reduce infrastructure and transportation costs is an important issue for any region. This bachelor thesis has a goal to analyze and build the model of the waste recycling logistics system on the basis of initial data for the city of Saint-Petersburg. The analysis of current methods, which can be used in order to achieve the goal of paper, revealed two types of optimization modelling methods: the linear programming and simulation modeling. The process of modelling the elements of waste recycling logistics system is conducted in this research with the usage of linear programming methods. The process of modelling of the waste recycling logistics system with the optimal parameters of its elements is carried out by using the following logistics methods and models: the methods of positioning of infrastructure objects within the system, the transportation-warehousing task, which supports to choose the optimal option of the logistics system structure, the travelling salesman task, which helps to make a ring route of transportation, and transport task with transit points, allowing to choose the optimal route of transportation inside the system. The result of modelling in this research is a determination of the optimal characteristics of functioning of the waste recycling logistics systems for the city of Saint-Petersburg. Firstly, the task of positioning of the infrastructure objects was solved. Then, the logistics system was assessed from the point of view of feasibility of infrastructure maintaining. After it, the model of waste collection within the area of Vasilievsky island was built. In conclusion, the model of the waste transportation from the transfer stations to the recycling centers was built. The proposed model provides an opportunity for reasonable complication for the researchers for achieving more relevant results.