Identification and prioritization of environmental risks of landfills and incinerators and its impact on the urban environment by fuzzy hierarchical analysis (FAHP)

Today, population growth and changes in lifestyles and consumption patterns have created dramatic changes in the quantity and quality of production waste, which has led to many problems and difficulties, such as problems in how to move and how to dispose of it. The city of Tehran, with the highest urban population in the country, with an average daily production of 7489 tons of waste, produces about 20% of the total waste of the country. Since the occurrence of any health and environmental crisis in this metropolis endangers the social life of the whole country, this study identifies the risks of both sanitary and incinerative landfilling methods and also ranks them to manage the environmental risk of waste sanitary and waste incineration methods in Tehran. will pay. The tool used in collecting the required data is this questionnaire study which was selected and completed by 130 experts, experts, specialists and students and professors in this field which was randomly selected using Cochran's formula. HAZID method was used to identify risks and EXCEL and SPSS statistical software were used to examine the questionnaires, which were finally ranked using FAHP hierarchical analysis method. The results show that in the landfill method, groundwater pollution and odor emission and in the waste incinerator method, air pollution, high cost of collection equipment and finally control of pollutants are the most important hazards of waste disposal at the Kahrik site.