Municipal solid waste incinerator MSWI fly ash

Metals in the feedstock end up in slag and fines. The slag meets the quality standards of the Dutch Building decree, and the fines have a comparable quality to municipal solid waste incineration (MSWI) fly-ash (a.4). 

Trace toxic metals may escape from the municipal incineration process. Various agents, such as 0.25 M Na-citrate, have been used to aid the removal of heavy metals during electrodialytic treatment of municipal solid waste incineration (MSWI) fly-ash (Pedersen 2002). One study found that the bottom ash in a municipal incineration system had 1000-fold higher levels of chromium(VI) in test leachates than the hopper cyclone and filter ashes (Abbas et al. 2001), but another study found the chromium in fly-ash to be mostly trivalent chromium (Coodarzi and Huggins 2001). 

The aim of this work was to sturfy the influence of water on metal extraction from the fly ash, for SFE at a scale of 2 kg solids. The final aim is to provide design parameters for a larger scale SFE unit. We concentrate on the main metals of municipal solid waste incinerator (MSWI) fly ash (Zn, Pb, Cu, Cd, and Mn, Figure 1). Since die ZnO content of the studied ash was high, Zn was chosen as model compound. Three types of eiqieriments were performed ... 

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See also in sourсe #XX -- [ , ]

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