Immobilization of fly ash from MSW incinerators and ash-melting furnaces
- Sumitomo Heavy Industries, Ltd., Shinagawa, Tokyo (Japan). Environment Div.
In Japan, residue from the incineration of municipal solid waste--both fly ash and bottom ash--had legally been classified as municipal waste and accordingly had been disposed in controlled landfill sites. In a revision implemented in April 1995, however, fly ash was reclassified as a special-controlled municipal waste and it became mandatory to dispose of the substance in controlled landfill sites only after it has been stabilized to prevent the leaching of heavy metals. The authors have conducted comparative fly ash treatment tests with various commercially available stabilizing agents and cement. They have also developed an inexpensive solidifying powder (SFPA, or Sumitomo Fine Powder Agent) and verified its effectiveness. Furthermore, in a series of treatment tests with ash-melting a furnace fly ash having a very high rate of heavy metal leaching such as 480 mg/l of lead, the authors confirmed that treatments combining SFPA and special aging have superior performance controlling lead leaching under 0.05 mg/l.
- OSTI ID:
- 544178
- Journal Information:
- Waste Management, Journal Name: Waste Management Journal Issue: 5-6 Vol. 16; ISSN WAMAE2; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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