Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans from paper mill sludge
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United States of America Patent
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-
Dec 24, 1991
Grant Date -
N/A
app pub date -
Oct 12, 1990
filing date -
Oct 12, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for removing PCDD's and PCDF's from paper mill sludge is provided. The process comprises combining the sludge with an oxidant and then oxidizing the sludge under supercritical or near supercritical conditions to destroy the PCDD's and PCDF's. Using this process, destruction efficiencies of greater than 98% have been achieved for 2,3,7,8-TCDD, which is reportedly the most toxic of the dioxins.
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