The WES-PHix{reg_sign} ash stabilization process
- Wheelabrator Environmental Systems Inc., Hampton, NH (United States)
This paper discusses a patented process developed by Wheelabrator Environmental Systems Inc. for chemically stabilizing ash from municipal solid waste combustion facilities. This technology, marketed commercial as the WES-PHix{reg_sign} Process, reduces the solubility of certain heavy metals in ash through the addition of soluble phosphate, lime and water. The addition of these reagents to ash promotes the formation of geochemically stable metal phosphate compounds which are resistant to leaching. The WES-PHix Process produces stabilized ash which consistently passes the US Environmental Protection Agency (EPA) Toxicity Characteristic Leaching Procedure and other regulatory leaching tests. The chemical reactions caused by the application of soluble phosphate and lime to ash are discussed. The solubility of metal phosphate compounds is examined, and stabilized ash leaching test data are presented. The advantages and performance record of the WES-PHix Process, including cost, are also presented.
- OSTI ID:
- 287487
- Report Number(s):
- CONF-960345--; ISBN 0-7918-1227-8
- Country of Publication:
- United States
- Language:
- English
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