Research On Optimization Of Domestic Waste Collection And Transportation In Q City Based On DEA Of Transfer Station

With the development of social economy,the amount of urban domestic waste is accelerating,and the effect of garbage disposal has a great impact on the environment and society.For the entire process of waste generation,collection,transportation and processing,the current research is mostly focused on the control of waste source and the method of end treatment.Less research concerned from the perspective of collection and transportation.The treatment of domestic garbage belongs to the field of reverse logistics,and the collection freight accounts for 60%-80%of the entire waste treatment system.Therefore,this paper mainly studies the collection and transportation of domestic garbage.First,this paper determine the research object and research purpose.The research object of this paper is Q City.For the collection and transportation of domestic garbage,according to the presence or absence of transfer stations,it is divided into direct receiving and indirect receiving.The receiving and transportation of transit stations is widespread now,but with the continuous development of the city and the source of garbage.The implementation of classification and the utilization rate of different transfer stations are also very different.Therefore,it is very important to evaluate the input and output of different transfer stations in Q City.Then,based on the evaluation results,we should consider how to improve the collection and transportation of domestic garbage.Second,this paper determine research ideas and research methods.The DEA method is used to evaluate the relative benefits of different transfer stations based on DEA results.For the transfer stations with higher relative benefits but not optimal,it shows that they have great value and need to find constraints and then improve.Based on DEA analysis and data comparison,the constraint is that the queue time is too long when the garbage truck unloads.This paper adopts the queuing theory optimization scheme of increasing unloading equipment,and uses the queuing theory model and the cost-benefit model of economics and the marginal algorithm to solve the problem.The number of equipment improve the efficiency of garbage collection and transportation,and reduce costs;For the transfer station with relatively low efficiency,we should adopt the shutdown strategy and implement the direct flow collection mode without transfer station.The biggest change before and after the closure is the garbage truck collection and transportation route.Therefore,after the transfer station is closed,the key research and collection route will be studied.The garbage collection route problem rarely studies waste sorting transportation and multi-vehicles,and the research objectives are relatively simple.Therefore,based on the actual situation of Q city,this paper establishes three kinds of collection and transportation models:garbage mixed collection model,garbage classification combined transportation The model and garbage classification are separately collected and transported,and the particle swarm optimization algorithm is used to obtain three kinds of receiving routes and vehicle scheduling schemes.Then,from the comparison of transportation cost,vehicle usage,driving distance and economic benefit,combined with game theory as well as the actual situation of Q city,choose the most suitable transportation route and vehicle scheduling method.Finally,the conclusion of the study are drawn.After the optimization of the domestic garbage collection and transportation in Q City,analyze the input and output changes before and after optimization,and then conduct a DEA evaluation to test the optimization effect.This article includes 23 images,45 tables,and 64 references.