Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Reexamination Certificate
2006-08-23
2008-03-04
Kreck, John (Department: 3672)
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
Reexamination Certificate
active
07338429
ABSTRACT:
The present invention relates to a method for direct treatment of liquid wastes containing up to 10% or 100,000 mg/L of arsenic by solidification/stabilization in a relatively cost effective and environmentally safe. The method also permits the simultaneous utilization other heavy metal bearing wastes (such as spent catalysts), in the solidification/stabilization of liquid wastes containing very high concentration of arsenic. It also deals with a method for converting liquid wastes containing very high concentration of arsenic into a non-leachable solid residue ready for final disposal. The direct treatment of liquid wastes containing very high concentration of arsenic by solidification/stabilization will eliminate the additional stage of converting liquid wastes to solid or semi-solid form prior to solidification/stabilization, thereby significant reduction in overall cost associated with arsenic waste treatment.
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Damodar Deshpande Sarvottam
Mahadeorao Deshkar Ashok
Palasram Patil Mahendra
Sukumar Devotta
Tapan Chakrabarti
Council of Scientific & Industrial Research
Kreck John
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