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

摘要：

从废物能源化和废物的运输角度出发，构建了一个基于垃圾分类的城市固体废弃物供应链网络，综合考虑了城市生活垃圾对处理方式的选择，以及垃圾收集点到中转站和中转站到处理设施点的运输路线的选择。在此基础上，以城市固体废弃物供应链网络总费用最小和总碳排放最小为优化目标，建立了城市固体废弃物供应链网络的多目标优化模型，并采用ε约束法进行求解。以一个广西省南宁市的城市固体废弃物供应链网络为例说明了该方法的实施步骤和有效性。研究结果表明，采用本文所提出的方法可以得到城市固体废弃物供应链网络的总费用和总碳排放的帕累托前沿，并能获得在不同目标值下的最优供应链网络和能源化方式。当权重因子均为0.5时，为供应链网络的权衡点，系统的总费用和总碳排放分别为-22034USD/d和533830kg/d。此外，本文还探究了电价的变化和垃圾转运效率系数对城市固体废弃物供应链网络帕累托前沿的影响。

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