关键词: 城市固体废弃物, 供应链网络, 垃圾分类, 经济性, 碳排放

Abstract:

A supply chain network of municipal solid waste (MSW) based on waste classification is constructed from the perspective of waste energy and transportation. The selection of treatment methods for MSW and the choice of transportation routes from the waste collection point to the transfer station, as well as from the transfer station to the treatment facility, are comprehensively analyzed. On this basis, a corresponding multi-objective optimization model of the MSW supply chain network is established with the optimization objectives of minimum total cost and minimum total carbon emission, and the ε-constraint method is used to solve it. Then, an example of the supply chain network of MSW in Nanning, Guangxi is taken to illustrate the implementation and effectiveness of this method. The results show that the Pareto frontier of total cost and total carbon emissions of the MSW supply chain network can be obtained using the method proposed in this paper, and the optimal supply chain network and waste energy utilization approaches under different target values can be obtained. When the weight factors are both 0.5, the total cost and total carbon emission of the system are -22034USD/d and 533830kg/d, respectively. In addition, the effects of electricity price changes and waste transfer efficiency coefficients on the Pareto frontier of the MSW supply chain network are explored.

Key words: municipal solid waste, supply chain networks, waste classification, economy, carbon emission