Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1994-08-26
1997-09-02
Straub, Gary P.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
588206, 588213, 210750, 210759, 210760, 210908, A62B 900, B01D 3700, B01D 4300
Patent
active
056634757
ABSTRACT:
In place of the incinerator in the present GWTPs, the following is substituted therein: a first reactor treats the vapor phase of the gases being expelled out of the air stripper. These vapors contain gases of volatile contaminants. The vapors are mixed with ozone and pumped into the first reactor where they are further scrubbed and oxidized in a packed column in contact with high concentration hydrogen peroxide. The hydrogen peroxide flows downward through the packing column while the Ozone mixture is fed from the bottom. The combined effect of ozone and hydrogen peroxide serves as a powerful oxidizing medium. The hydrogen peroxide accumulated at the bottom is pumped to the top in a recirculation process to be reused. The hydrogen peroxide can be increased to high concentrations, such as 30%, and recirculated for optimum usage. The second reactor is designed for the water, that is, for liquid phase treatment. The water expelled from the bottom of the air stripper is pumped into an ozone and hydrogen peroxide reactor where ozone gas is bubbled into the reactor together with low concentration hydrogen peroxide in order to decompose and oxidize the contaminants in the water. For low concentration contamination, such as 5 ppm, it may be possible to eliminate hydrogen peroxide and use ozone only. In this scheme a powerful water treatment system is not needed because the air stripper has already done a major part of the work and only a low energy system is sufficient.
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Stover Thomas C.
Straub Gary P.
The United States of America as represented by the Secretary of
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