Lime and fly ash stabilization of wastewater treatment sludge

Details Lime and fly ash stabilization of wastewater treatment sludge Lime and fly ash stabilization of wastewater treatment sludge

1991-11-01

1994-01-11

Wyse, Thomas

Liquid purification or separation

Processes

Chemical treatment

210764, 106624, 106697, 588258, C02F 168

Patent

active

052778266

ABSTRACT:
This invention provides a process meeting the EPA's PFRP standard for WWTS treatment thereby producing a readily usable end-product in either soil-like form or semi-impermeable low load bearing, mass form. The process includes mixing WWTS with lime and fly ash, to cause a temperature increase to above 70.degree. C. for at least 30 minutes and to cause the pH to exceed 12 for at least 2 hours. The end-product may be compacted to produce an semi-impermeable, durable mass or the soil-like product may be used as landfill cover material.

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