STP1123: Fixation of Residues from Special Hazardous Waste Incinerators for Shallow Land Disposal

    Assmann, D
    Scientist and group leader, Nuclear and Chemical Waste Management, Institute of Chemical Technology, KFA-Julich, Julich,

    Brodda, B-G
    Scientist and group leader, Nuclear and Chemical Waste Management, Institute of Chemical Technology, KFA-Julich, Julich,

    Pages: 13    Published: Jan 1992


    Abstract

    The residues from special waste incineration (slag, filter dust, and the reaction products from off-gas purification—the salts) must be stored at special dumps since they are highly polluted with heavy metals. The extraction rate of heavy metals out of unfixed filter dusts and salts is very high. Therefore, salts can only be stored underground. On the other hand, getting licenses to build such special dumps is very difficult. A fixation of boiler ash (a special filter dust) or salts with water glass and aluminum phosphate (AlPO4) hardener reduces the leachability of heavy metal so well that these fixed residues can be dumped together with municipal or commercial and industrial refuse rather than in an underground repository.

    Keywords:

    special waste incineration, slag, filter dust, flue ash, boiler ash, salts, special dumps, residential refuse, commercial refuse, industrial refuse, fixation, leachability, water glass, aluminum phosphate hardener


    Paper ID: STP19544S

    Committee/Subcommittee: D34.07

    DOI: 10.1520/STP19544S


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