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Multi-criteria Model Development to Evaluation of Waste Energy and Material Recovery in Tehran

Salehi, Niloufar | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49432 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Saboohi, Yadollah
  7. Abstract:
  8. Waste management is one of the essential and basic utility services in 21st century, especially in rural areas. It includes different environmental, technical, economic, legal and social aspects which need to be considered in levels of waste generation, transport, treatment and disposal. Therefore, considering economic criterion in waste management programs, as the only one criterion, will result in environmental impacts in long-term and impose high costs to the society and the economy overall. The main purpose of this study is to develop a multi-criteria mathematical model, which take into account both economic and environmental criteria in order to present an integrated municipal solid waste management structure and introduce an optimal and sustainable set of waste treatment technologies in Tehran. The economic objective minimizes the capital and operation costs of the technologies and the environmental objective minimizes the greenhouse gases generated in transport and treatment levels. The emission factors calculated based on IPCC guideline and the avoided emission resulted from waste energy and material recovery. Moreover, three scenarios were used for assessing different approaches and comparing them. Sc-1 is minimization of costs, Sc-2 is minimization of GHG emissions and Sc-3 is the multi-criteria minimization of costs and GHG emissions. As the major part of Tehran’s MSW is organic, the results showed that anaerobic digestion of organic waste and composting of its sludge in an integrated complex is the optimal solution. The model also emphasized on waste separation at source which increases waste recycling profit and avoids more emission, as less raw materials will be used to produce products. The results also showed that there is not a significant difference in current Tehran waste management and the optimal solution of the multi-criteria model, but it represented that by choosing the optimal solution, decrease in environmental impact is remarkable. This model can be used as an analytical tool, which can pay politicians, authorities and experts attention to sustainable development, holistic planning and resource depletion
  9. Keywords:
  10. Environmental Impact ; Multicriteria Optimization ; Waste Management ; Dry Solid Waste ; Waste Processing Technology ; Greenhouse Gases ; Municipal Solid Waste ; Materials Recovery

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