Ash dump sites – landfills – contain an aqueous mixture of bottom ash and fly ash accumulated over time in artificial pond-like structures. The content of the ash landfills has complex and non-homogenous properties, which limit drastically the applicability of complete recycling procedures aiming to landfill reclamation. A process and technology is proposed to separate various components of the mixture depending on desired recyclability characteristic. A special characteristic of the BA component is the content of unburned carbon, due to incomplete combustion in the boiler furnace. A special, multi-objective procedure for separation of ash particles containing unburned carbon has been developed with the purpose of obtaining synthetic graphite. In order to achieve full recycling of the ash landfill content, various secondary waste materials resulting from separation and concentration phases of the process flow must be further processed and sorted in order to ensure properties that guarantee recyclability. The process flow presented incorporates the graphitization process flow in such way that all secondary waste fractions can be recycled in various directions.
Bottom Ash, Unburned carbon, Recycle, Synthetic graphite, Particle Size Distribution
Cite this paper
Mihai Cruceru, Lucica Anghelescu, Bogdan Diaconu. (2020) An Integrative Process and Technology for Reclamation of Ash Landfill with Complete Recycling of Ash. International Journal of Environmental Science, 5, 6-11
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