This paper presents an Algorithm to solve an urban waste collection problem bydelivering suitable route in each separate areas of Tehran in order to minimize the costof waste collection. We know the fuel consuming has a direct relation ship withdriving distances by coll More
This paper presents an Algorithm to solve an urban waste collection problem bydelivering suitable route in each separate areas of Tehran in order to minimize the costof waste collection. We know the fuel consuming has a direct relation ship withdriving distances by collection vehicles, so, by minimize the cost of fuel consumingbecause waste collection consist of 50%-70% of totally collection expenses.Mathematical programming used to solve this problem base on integerprogramming with three variables and four limits.We propose a practical solution method which consists of three components: zoningAlgorithm, route generating Algorithm and combination Algorithm.Zoning Algorithm: a separated area divides in to small areas which each areaconsist of many big trash bins and surrounded between four streets, each points onborder could be considered as a start or end points.Route generating Algorithm: find the smallest routes between start and end points.Combination Algorithm: find the suitable neighborhood areas by consideration ofthe collection vehicles and capacities in each area. Until to minimize the traversedcompletely. Our topological limitations are: deadened streets, boulevards, traffic laws,such as one way streets in order to become closer in the real in the real word scale.The experimental results on real word problem, using data from 3 separate areas ofTehran, showed the superiority of the solution generated by the porposed intelligentAlgorithm to the solution generated by human experts.
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Solid wastes separation at the source of production --"producer source separation plan"-- has been carried out since 1374 in the districts of Tehranwith various methods to increase recycling efficiency. District 20 ofTehran is one of the districts that attempted to impl More
Solid wastes separation at the source of production --"producer source separation plan"-- has been carried out since 1374 in the districts of Tehranwith various methods to increase recycling efficiency. District 20 ofTehran is one of the districts that attempted to implement these projects at that time. In this district, about 70% of the recycling has been performed through the traditional system and 30% through the technical system since 1383. The present study aimed to compare the two methods considering environmental economic aspect. To this end, the Solid Wastes Separation Plan was implemented inTehran district 20 in the year 1384. The results revealed that the project’s profits, consistent with the technical and administrative system in the first year of implementation (1384), turned out to be negative, but the profits of dry solid wastes collected through the traditional system were positive. In the years 1385 and 1386 (the second and third years of implementation), 50% and 100% of the households were included in the producer source separation plan, respectively. Moreover, the project’s profits in 1385 and 1386 were estimated to be 1.6 % and 3.3% higher than that of 1384, respectively.
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Devoting the most portion of expenditures of the solid waste management on the one hand , and the necessity of operation exploiting of this system with decreasing the spent time on the other hand have propound the optimization of solid waste collection and transportatio More
Devoting the most portion of expenditures of the solid waste management on the one hand , and the necessity of operation exploiting of this system with decreasing the spent time on the other hand have propound the optimization of solid waste collection and transportation system as a principle in designing and management With regard to performance of present solid waste collection and transportation system in Zanjan and lack of suitable organization, it is necessary to evaluate the advantages and disadvantages of the system with mathematical relations and GIS, afterwards, with regard to urban structure and tonnage of the produced solid waste, the most optimized management system must be presented. In this research karmandan town in the city of Zangan was chose as the pilot.
Time data of the solid waste collection and transportation stages in the present routes of collection in karmandan the district of Zanjan was gathered within 10 minutes using two digital chronometers and was analyzed by mathematical relations, excel software and GIS. Thereafter, depending on this information such as density, population and the capacity of garbage production in present routes and using mathematical relation and GIS. Optimized system of solid waste was calculated and designed.
The results of time evaluation of the present management system shows that the whole spent time for solid waste collection and transportation Karmandan town by garbage trucks takes 2 hours, 55 minutes and 42 seconds and the mean time of the trucks round trip per ton of solid waste
In each journey is 11 minutes and 44 seconds. Considering locating of storages and assigning the optimized routs, solid waste collection system was calculated and designed using mathematical relation and GIS.
. In this research designing solid waste collection system of karmandan town was also carried out and 60 containers with the capacity of 550 and 660 liters were located in the town. With designing optimized routs by GIS and trial and error method, there tracks including a reserved truck were calculated and recommended to collect the solid waste of karmandan town.
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