Residues characterisation from the fluidised bed combustion of East London’s solid recovered fuel |
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Authors: | DE Balampanis SJT Pollard N Simms P Longhurst F Coulon R Villa |
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Institution: | 1. Aalto University, School of Chemical Engineering, Department of Chemical and Metallurgical Engineering, P.O. Box 16100, FI-00076 Aalto, Finland;2. Lassila & Tikanoja plc, Sepelitie 25, FIN-40320 Jyväskylä, Finland;3. VTT Technical Research Centre of Finland Ltd, P.O. Box 1000, FI-02044 VTT, Finland;1. Chemical Engineering Department, University of Alicante, P.O. Box 99, 03080 Alicante, Spain;2. Laboratory of Dioxins, Environmental Chemistry Department, IDAEA-CSIC, Jordi Girona 18-26, Barcelona 08034, Spain;1. Laboratory of Dioxins, Environmental Chemistry Department, IDAEA-CSIC, J. Girona 18-26, Barcelona 08034, Spain;2. Department of Statistics and Operational Research, Universitat Politècnica de Catalunya, Barcelona, Avda. Diagonal 647, Barcelona 08028, Spain |
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Abstract: | Waste thermal treatment in Europe is moving towards the utilisation of the combustible output of mechanical, biological treatment (MBT) plants. The standardisation of solid recovered fuels (SRF) is expected to support this trend and increase the amount of the generated combustion residues. In this work, the residues and especially the fly ashes from the fluidised bed combustion (FBC) of East London’s NCV 3, Cl 2, and Hg 1 class SRF, are characterised. The following toxicity indicators have been studied: leachable chlorine, organochlorides expressed as pentachlorobenzene and hexachlorobenzene, and the heavy metals Cu, Cr, Cd, Zn, Ni, and Pb. Furthermore the mineralogical pattern of the ashes has been studied by means of XRD and SEM–EDS. The results suggest that these SRF derived ashes have significantly lower quantities of Cu, Cd, Pb, Zn, leachable Cl, and organochlorides when compared to other literature values from traditional waste thermal treatment applications. This fact highlights the importance of modern separation technologies employed in MBT plants for the removal of components rich in metals and chlorine from the combustible output fraction of SRF resulting to less hazardous residues. |
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