STABILIZING HAZARDOUS WASTES USING WASTE BYPRODUCTS
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United States of America Patent
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Issued Date -
Oct 4, 2012
app pub date -
Mar 26, 2012
filing date -
Mar 29, 2011
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Abstract
A method of disposing of two or more waste materials, including at least one hazardous waste material, which method includes the steps of: obtaining a waste byproduct; producing a reagent from the waste byproduct which reagent includes one or more contaminates; obtaining a waste material containing one or more hazardous heavy metals; treating the hazardous heavy metal containing waste material with the reagent from step b) to stabilize the hazardous heavy metal containing waste material; and disposing of the stabilized hazardous heavy metal containing waste material. According to one embodiment the waste byproduct is gypsum. The gypsum can be obtained from a flue gas desulfurization process. According to another embodiment the waste byproduct is a calcium carbonate containing byproduct which is reacted with acid tar to produce calcium sulfide. The calcium carbonate containing byproduct can come from a Solvay process.
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