Document Type : علمی - پژوهشی


Department of Environmental Sciences, Research Institute, Shahid Beheshti University, Tehran


Bottom sludge generated in evaporation ponds is one of the most important wastes in combined cycle power plants. Since previous studies show that wastewater incoming to evaporation ponds contains various contaminants, so the settled sludge can be mentioned as a hazardous waste. Waste characterization showed high concentration of heavy metals (i.e. Lead and Chromium) and Total Petroleum Hydrocarbons in the generated sludge. Regarding to classification criteria of the Basel Convention and other international instructions (such as EPA) revealed this waste can be categorized as a hazardous waste. Then all possible methods for sludge management was evaluated based on technical, economic and environmental aspects and land disposal was selected as preferred method. Finally various scenarios including landfill and surface impoundment were considered. To avoiding penetration of contaminants to the environment, IWEM model was used to design of bottom lining system where different environmental scenarios and leakage concentrations was evaluated.


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