Method for stabilizing contaminated waste
AssigneeRMT, Inc.
InventorsAjit K. Chowdhury, Jeff C. Macri, Kevin L. Baker, Gregory J. Graf
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Abstract
A method for solidifying an oil-contaminated aqueous waste in situ or ex situ includes the step of combining the oil-contaminated waste with a clay, a cement and a sulfite salt solidification agent to form a solidified waste matrix, wherein the solidification agent undergoes hydration and cementation reactions in the waste matrix in the presence of water. Optionally, heavy metal stabilizing agents can also be combined with the waste.
Claims28
A method for solidifying an oil-containing waste, the method comprising the steps of:
- providing the waste at a temperature above about 32° F.;
- mixing a clay, a cement, a sulfite salt and water with the waste to form a solid waste matrix having an unconfined compressive strength of at least about 0.5 tons/ft2, wherein the waste contains water and wherein at least one of the clay and the cement are mixed with the waste before the sulfite salt is mixed with the waste.
A solidified waste matrix comprising an oil-contaminated waste, a clay, a cement, and a salt selected from the group consisting of a sulfite salt, a hydrated sulfite salt and a sulfate salt, the matrix having an unconfined compressive strength of at least about 0.5 tons/ft2 and a permeability coefficient no higher than about 1×1031 5 cm/sec.
A method for solidifying an oil-containing waste, the method comprising the steps of:
- providing the waste at a temperature above about 32° F.;
- mixing a clay, a cement, a sulfite salt and water with the waste to form a solid waste matrix having an unconfined compressive strength of at least about 0.5 tons/ft2, wherein the waste is dry and wherein the waste is combined with the water to form a slurry that is then mixed with sulfite salt.
Dependencies are inferred from the claim text.