Background & objectives: Increasing solid waste has made waste management an important challenge ... more Background & objectives: Increasing solid waste has made waste management an important challenge in developing countries. The purpose of this study is to comparative evaluation of the application of incineration technologies and other waste disposal methods in Iran using the Analytical Hierarchy Process (AHP) in 2019. Methods: In this descriptive-applied research, after making a hierarchy, the first criteria and decision alternatives (1-Sanitary landfill Method 2-Source Reduction, Recycling+ Compost+ Landfill 3-Source Reduction, Recycling+Incineration Technologies+ Landfill) were selected. Then, the comparison and analysis were performed using Expert Choice 11 software and Analytical Hierarchy Process. Results: The weights of three scenarios (1-Sanitary landfill Method 2-Source Reduction, Recycling+ Compost+ Landfill 3-Source Reduction, Recycling+ Incineration Technology+ Landfill) for waste management in Iran were determined, 0.26, 0.486 and 0.255, respectively. The Consistency Ratio (CR) was obtained less than 0.1 for all paired matrices of alternatives. Conclusion: The second scenario with the weight of 0.486 was selected as the best method for solid waste management in Iran. Therefore, it is recommended to invest on and create the necessary infrastructure in the country in line with the above-mentioned priority. The third scenario, with a weight of 0.255, was selected as the last priority of waste management in the country. Therefore, it is recommended that supervisory and responsible organizations do not have a permit to construct and commission of incineration technologies for municipal waste management without conducting environmental, health and economic studies.
ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. ... more ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. The present study was aimed to evaluate the efficiency of the electrocoagulation system in removing chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) from leachate. The paper investigated the factors affecting removal efficiency such as current density (187.5, 375, and 562.5 A/m2), electrode material (Al and Fe), and electrolysis time and pH of the solution (6.5 ± 0. 2). The results indicated that, in optimum conditions, the highest COD and NH4-N removal efficiencies were 66 and 63%, respectively. According to the results, performance of the Al electrode was better than that of the Fe electrode in terms of COD and NH4-N removal. Therefore, the results showed that electrocoagulation can be applied for the leachate pretreatment as a feasible and reliable technique.
ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. ... more ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. The present study was aimed to evaluate the efficiency of the electrocoagulation system in removing chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) from leachate. The paper investigated the factors affecting removal efficiency such as current density (187.5, 375, and 562.5 A/m2), electrode material (Al and Fe), and electrolysis time and pH of the solution (6.5 ± 0. 2). The results indicated that, in optimum conditions, the highest COD and NH4-N removal efficiencies were 66 and 63%, respectively. According to the results, performance of the Al electrode was better than that of the Fe electrode in terms of COD and NH4-N removal. Therefore, the results showed that electrocoagulation can be applied for the leachate pretreatment as a feasible and reliable technique.
Background & objectives: Increasing solid waste has made waste management an important challenge ... more Background & objectives: Increasing solid waste has made waste management an important challenge in developing countries. The purpose of this study is to comparative evaluation of the application of incineration technologies and other waste disposal methods in Iran using the Analytical Hierarchy Process (AHP) in 2019. Methods: In this descriptive-applied research, after making a hierarchy, the first criteria and decision alternatives (1-Sanitary landfill Method 2-Source Reduction, Recycling+ Compost+ Landfill 3-Source Reduction, Recycling+Incineration Technologies+ Landfill) were selected. Then, the comparison and analysis were performed using Expert Choice 11 software and Analytical Hierarchy Process. Results: The weights of three scenarios (1-Sanitary landfill Method 2-Source Reduction, Recycling+ Compost+ Landfill 3-Source Reduction, Recycling+ Incineration Technology+ Landfill) for waste management in Iran were determined, 0.26, 0.486 and 0.255, respectively. The Consistency Ratio (CR) was obtained less than 0.1 for all paired matrices of alternatives. Conclusion: The second scenario with the weight of 0.486 was selected as the best method for solid waste management in Iran. Therefore, it is recommended to invest on and create the necessary infrastructure in the country in line with the above-mentioned priority. The third scenario, with a weight of 0.255, was selected as the last priority of waste management in the country. Therefore, it is recommended that supervisory and responsible organizations do not have a permit to construct and commission of incineration technologies for municipal waste management without conducting environmental, health and economic studies.
ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. ... more ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. The present study was aimed to evaluate the efficiency of the electrocoagulation system in removing chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) from leachate. The paper investigated the factors affecting removal efficiency such as current density (187.5, 375, and 562.5 A/m2), electrode material (Al and Fe), and electrolysis time and pH of the solution (6.5 ± 0. 2). The results indicated that, in optimum conditions, the highest COD and NH4-N removal efficiencies were 66 and 63%, respectively. According to the results, performance of the Al electrode was better than that of the Fe electrode in terms of COD and NH4-N removal. Therefore, the results showed that electrocoagulation can be applied for the leachate pretreatment as a feasible and reliable technique.
ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. ... more ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. The present study was aimed to evaluate the efficiency of the electrocoagulation system in removing chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) from leachate. The paper investigated the factors affecting removal efficiency such as current density (187.5, 375, and 562.5 A/m2), electrode material (Al and Fe), and electrolysis time and pH of the solution (6.5 ± 0. 2). The results indicated that, in optimum conditions, the highest COD and NH4-N removal efficiencies were 66 and 63%, respectively. According to the results, performance of the Al electrode was better than that of the Fe electrode in terms of COD and NH4-N removal. Therefore, the results showed that electrocoagulation can be applied for the leachate pretreatment as a feasible and reliable technique.
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Papers by M. Ghayebzadeh