فصلنامه مدیریت پسماندها
پیاپی 11 (پاییز 1387)

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.

With the growth population and furthest using of nautral resource and solid wasteproduction, finding a suitable site for burying solid waste has become a real burden. The lack of new burial sites from an economical point of view, and the reduced capacity of existing locations.will lead to a special crisis in urban areas. The main reasons for opposition to new waste burial sites are pollution of ground water, the environmental impacts of leachates and lack of special regulation and standards along with lax implementation, witch are threatening public and environmental health. Flowing ground water is very slowly, after the begining of pollution, sevral years must be spent until the pollution,s influences water apears in a well. for this reason after the removal of pollution source. Many years have to spend until the affected layers come back to the first condition. Daily, 350ton waste were been producted in the town and were been disposed in near industerial park lia in the south bound Qazvin in smooth land that slop was less than 3% and using piling method on sandy & clay liners without bed covering. The leach waste this site Serious theatening in Qazvin has also polluted in the groundwater in the region. Result of study on ground water at near of land filling site and leach west quality in the year 1381 indicated that several of anions and cations in ground water reasources in studied area was more than standard limits because of ground water in studied area has several usage for industries and suburn sidents.Spesial preservative actions should be taken to prevent pollution. In the last years protect of environment of Qazvin officedid supervisory actions so that situation of land filling site become better than before, because of westse,cover with soil and don,t open dumping of several industrial westes. Leaching water and groundwater of places of sampeling was resampled during last year.Results shows that leaching water quality had the positive changes and the difference between two sampling were meaningful and some metal parameters increase but some of them decrease.