Optimization of urban solid waste disposal in moderate and humid climate based on IWM-2 model (Case study: Mazandaran province, Nowshahr city)
Subject Areas : environmental managementmahdieh seifollahi 1 , roksana mogoyi 2 * , mozhgan zaeimdar 3
1 - PhD Student, Department of Environmental Management, North Tehran Branch, Islamic Azad University, Tehran, Iran.
2 - Associate Professor, Department of Environmental Management, North Tehran Branch, Islamic Azad University, Tehran, Iran. *(Corresponding Author)
3 - Assistant Professor, Department of Environmental Management, North Tehran Branch, Islamic Azad University, Tehran, Iran.
Keywords: waste management, life cycle assessment, IWM-2 model, Nowshahr.,
Abstract :
Background and Objective: All activities related to urban solid waste management, in addition to the economic burden, can lead to serious environmental hazards if technical principles are not followed. This study was conducted with the aim of comparing different scenarios of waste management in Nowshahr city, with the approach of life cycle assessment and in order to choose the most efficient method in terms of compatibility with the environment.Material and Methodology: After examining the quantitative and qualitative characteristics of production solid waste and their current disposal method in Nowshahr, the results were used to evaluate the life cycle of seven different scenarios of waste management, including the combination of four disposal methods, compost, recycling, waste incineration along with energy extraction and sanitary burial. became. Life cycle inventory was done with the help of IWM-2 model.
Findings: The current municipal waste management system in Nowshahr (first scenario) with an ecological index of 14987/49 brings the most pollution to the environment. Incorporating the methods of composting the organic part of waste and recycling from degradable materials, by increasing the amount of materials for recycling and reuse, as well as preventing emissions from the production of raw materials, significantly reduces the amount of environmental pollutants. So that the fifth scenario (61% compost, 31% recycling and 8% sanitary burial) with an ecological index of 2555.55 produces the least pollution.
Discussion and Conclusion: Considering that a high percentage of Nowshahr's municipal solid waste is made up of perishable waste, the simultaneous application of composting and recycling methods can be a good option for optimal waste management in this city and play an important role in reducing environmental pollution.
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