University of Tehran Journal of Natural Environment 2008-7764 77 2 2024 08 31 Energy optimization of the simultaneous management system of wastewater and solid waste in Tehran Energy optimization of the simultaneous management system of wastewater and solid waste in Tehran 189 202 97514 10.22059/jne.2024.371016.2641 FA Niloofar Sadeghi Looyeh Department of Mechanical Engineering of Agriculture Machinery, Faculty of Agriculture, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Shahin Rafiee Department of Mechanical Engineering of Agriculture Machinery, Faculty of Agriculture, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Ali Jafari Department of Mechanical Engineering of Agriculture Machinery, Faculty of Agriculture, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Morteza Aghbashloo Department of Mechanical Engineering of Agriculture Machinery, Faculty of Agriculture, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Hossein Mobli Department of Mechanical Engineering of Agriculture Machinery, Faculty of Agriculture, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Journal Article 2024 01 15 Population growth and industrialization have led to an increase in waste and sewage production, which is always a concern for urban managers. With the increasing population, in addition to increased waste production, the need for energy also increases. With the increase in energy consumption, a renewable source must be sought to meet the country's needs. Municipal solid waste and sewage sludge have a high potential for energy production due to the high volume of organic matter in them. Therefore, in addition to waste disposal, appropriate management of waste and sewage can be used as a suitable source of energy production. In this research, simultaneous management of sewage and solid waste in Tehran was carried out. For this purpose, information was implemented on a superstructural model, and then, using Python programming language and decision nodes, decision coefficients from 0 to 100 percent with a one percent step were considered. Finally, 592 scenarios were proposed, and two scenarios were selected as the best scenarios in terms of energy perspective, with the approaches of heat recovery and electricity production. In these two scenarios, approximately two million gigajoules and one million four hundred thousand gigajoules were recovered as the highest heat and electricity from simultaneous management of sewage and solid waste in Tehran city, respectively. By implementing this model for Tehran, urban managers can use waste and sewage as a source to meet the energy needs of waste disposal systems and supply part of the city's energy needs. Population growth and industrialization have led to an increase in waste and sewage production, which is always a concern for urban managers. With the increasing population, in addition to increased waste production, the need for energy also increases. With the increase in energy consumption, a renewable source must be sought to meet the country's needs. Municipal solid waste and sewage sludge have a high potential for energy production due to the high volume of organic matter in them. Therefore, in addition to waste disposal, appropriate management of waste and sewage can be used as a suitable source of energy production. In this research, simultaneous management of sewage and solid waste in Tehran was carried out. For this purpose, information was implemented on a superstructural model, and then, using Python programming language and decision nodes, decision coefficients from 0 to 100 percent with a one percent step were considered. Finally, 592 scenarios were proposed, and two scenarios were selected as the best scenarios in terms of energy perspective, with the approaches of heat recovery and electricity production. In these two scenarios, approximately two million gigajoules and one million four hundred thousand gigajoules were recovered as the highest heat and electricity from simultaneous management of sewage and solid waste in Tehran city, respectively. By implementing this model for Tehran, urban managers can use waste and sewage as a source to meet the energy needs of waste disposal systems and supply part of the city's energy needs. https://jne.ut.ac.ir/article_97514_7f32d84caf28d919338820d69e946f30.pdf