Study on Rural Solid Waste Collection and Transportation Mode and Route Optimization Strategy in the Cold Regions of Northern China

Rural vitalization is a major strategy for reform and development of agriculture and rural areas in China, the key task of which is improving rural living environment. Imperfect rural solid waste（RSW） collection and transportation system exacerbates the pollution of RSW to rural living environment, while it has not been established and improved in the cold region of Northern China due to climate and economy. Through the analysis of the current situation of RSW source separation, collection, transportation and disposal in China, an RSW collection and transportation system suitable for the northern cold region was developed. Considering the low winter temperature in the northern cold region, different requirements for RSW collection, transportation and terminal disposal, scattered source points and single terminal disposal nodes in rural areas, the study focused on determining the number and location of transfer stations, established a model for transfer stations selection and RSW collection and transportation routes optimization for RSW collection and transportation system, and proposed the elite retention particle swarm optimization–genetic algorithm（ERPSO–GA）. The rural area of Baiquan County was taken as a representative case, the collection and transportation scheme of which was given, and the feasibility of the scheme was clarified by simulation experiment.