Method and apparatus to detoxify aqueous based hazardous waste

Details Method and apparatus to detoxify aqueous based hazardous waste Method and apparatus to detoxify aqueous based hazardous waste

1991-11-19

1993-06-22

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210684, 210688, 2101952, 2101981, 2102572, B01D 5928, B01D 6100

Patent

active

052214800

ABSTRACT:
A process and apparatus is provided in which aqueous based wastes are processed to remove solids, decant phase separated product, optimize chemically for solvent specific extraction, remove toxic metals and organics via solvent extraction and remove residual metals and organics via flocculation/filtration and adsorption with activated carbon. The system employs chemical optimization of the aqueous waste stream by the addition of reagents to optimize subsequent treatment and the addition of chelating agents which inhibit the precipitation of heavy metals so that they are maintained in the waste stream as an organometallic complex which can be extracted via carbon dioxide extraction and concentrated for recovery, recycling or final disposal.

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