Treatment of municipal waste ash

Details Treatment of municipal waste ash Treatment of municipal waste ash

1992-04-28

1995-02-07

Reese, Randolph A.

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

588252, 106705, 405128, B09B 300

Patent

active

053877390

ABSTRACT:
Ash obtained from incineration of municipal waste is mixed with small quantities of water, from 10-35% by weight of the ash, and the product so formed is compacted and extruded. Where required, sufficient lime is added to raise the pH of the product from about 7.4 to about 11.6. The lime can be combined with a product containing silica and/or alumina. The solid products obtained are virtually insoluble in water and are substantially non-polluting.

REFERENCES:
patent: 4028130 (1977-06-01), Webster et al.
patent: 4432666 (1984-02-01), Frey et al.
patent: 4741782 (1988-05-01), Styron
patent: 4812169 (1989-03-01), Matsuura et al.
patent: 5037286 (1991-08-01), Roberts
patent: 5073197 (1991-12-01), Majumdar et al.
patent: 5150985 (1992-09-01), Roesky et al.
"Fly Ash Facts for Highway Engineers" USDOT/FHWA Publication FHWA-DP-59-8, Jul. 1986, pp. 4 and 6.

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