University of Bologna

Characterisation of Incinerator Residues for Their Possible Re-Use

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Courtesy of University of Bologna

MSW incineration produces a high quantity of residues (slags, fly ashes, sludges). Recycling suitability of residues is therefore an important issue requiring as a first step their physical and chemical characterisation (mass, granulometry distribution, merceology) and determination of their hazardousness (i.e. pollutant contents of heavy metals and chlorinated organic compounds). Characterisation of slags from a representative national plant has shown that an average concentration of pollutants very close to that in fly ashes is found only in the thinner fractions of these residues. Separation of these fractions may therefore be sufficient for obtaining recyclable inert residues.

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