Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1991-05-21
1993-09-14
Straub, Gary P.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
423659, 106405, 106DIG1, 110259, C04B 1804, A62D 300
Patent
active
052451143
ABSTRACT:
Bottom ash arising from solid waste combustion has lead (Pb) sufficient quantity to sometimes fail the EPA TCLP test. Addition of water-soluble phosphate, especially phosphoric acid, increases the immobilization of lead (Pb) so as to make such residues in compliance with the toxicity tests over a substantially broader pH range, particularly with respect to the more stringent TCLP extraction test. The bottom ash may be wet or dry when contracted with the water-soluble phosphate. The contacting is preferably preformed in an enclosed environment to avoid bottom ash contact with or exposure to the ambient atmospheres prior to treatment.
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Straub Gary P.
Vanoy Timothy C.
Wheelabrator Environmental Systems Inc.
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