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1. WO2001072395 - DISPOSITIF ET PROCEDE PERMETTANT D'EXTRAIRE LE MERCURE ET LES COMPOSES MERCURIQUES PRESENTS DANS DES EFFLUENTS DENTAIRES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:
1. A contaminant removal system for treating a three-phase effluent, comprising: a particle collection vessel for removing a particulate solid phase and a liquid phase from the three-phase effluent;
a first discharge line from the vessel for removing the liquid phase from the vessel; a second discharge line from the vessel for removing the gas phase from the vessel; and
a liquid treatment device for removing and/or stabilizing a contaminant in the liquid phase to form a treated liquid phase.
2. The contaminant removal system of Claim 1, wherein the particle collection vessel includes one or more baffles.
3. The contaminant removal system of Claim 1, further comprising a timer connected to a pump on the first discharge line to cause periodic removal of the liquid phase from the vessel.
4. The contaminant removal system of Claim 1, wherein the liquid treatment device includes one or more chemical dosers that contact one or more of a pH adjustor, an oxidant, a reductant, and a precipitant with the liquid phase.
5. The contaminant removal system of Claim 1, wherein the liquid treatment device includes one or more sorbent columns that contact the liquid phase with one or more sorbents.
6. The contaminant removal system of Claim 1, wherein the particle collection vessel is connected by a waste discharge line to at least one liquid collection device adjacent to a dental chair and wherein the waste discharge line transports the effluent from the sink to the particle collection vessel.
7. A process for removing a contaminant from a three-phase effluent, comprising:
introducing the three-phase effluent into a particle collection vessel;
reducing the velocity of and/or redirecting the direction of movement of the effluent, thereby causing a solid phase and a liquid phase to separate from a gas phase;
removing the gas phase from the collection vessel;
removing the liquid phase from the collection vessel; and
contacting the liquid phase with at least one of an additive and/or a sorbent to form a treated liquid phase.

8. The method of Claim 7, wherein the liquid phase is removed discontinuously from the collection vessel and the contaminant.
9. The method of Claim 7, wherein the contacting step comprises:
first contacting the liquid phase with one or more of a reductant, an oxidant, a precipitant, and a pH adjustor; and
second contacting the liquid phase with a sorbent to remove metal therefrom.
10. The method of Claim 7, wherein the contacting step comprises contacting the liquid phase with one or more precipitants prior to discharging the liquid.
1 1. The method of Claim 10, wherein the precipitant is a sulfide, thioamide, or thiocarbamate.
12. The method of Claim 7, wherein the additive is one or more of a reductant, an oxidant, a precipitant, and a pH adjustor.
13. A process for removing entrained particles from a three-phase effluent produced by a dental process, comprising:
introducing the three-phase effluent into a particle collection vessel;
reducing the velocity of and/or redirecting the direction of movement of the effluent in the particulate collection vessel, thereby causing a solid phase and a liquid phase to separate from a gas phase;
removing the gas phase from the collection vessel; and
removing the liquid phase from the collection vessel
14. The method of Claim 13, further comprising:
contacting the liquid phase with at least one of an additive and a sorbent to form a treated liquid phase.
15. The method of Claim 13, wherein the liquid phase is removed discontinuously from the collection vessel.
16. The method of Claim 14, wherein the contacting step comprises:
first contacting the liquid phase with one or more of a reductant, an oxidant, a precipitant, and a pH adjustor;
second contacting the liquid phase with a sorbent to remove metal therefrom.
17. The method of Claim 14, wherein the contacting step comprises contacting the liquid phase with one or more precipitants prior to discharging the liquid.
18. The method of Claim 17, wherein the precipitant is sulfide, thioamide, or thiocarbamate.

19 The method of Claim 14, wherein the additive is one or more of a reductant, an oxidant, a precipitant, and a pH adjustor
20 A system for treating a three-phase effluent from a dental operation, comprising:
a particle collection vessel for removing a particulate solid phase and a liquid phase from the three-phase effluent;
a first discharge line from the vessel for removing the liquid phase from the vessel, a second discharge line from the vessel for removing the gas phase from the vessel, and
an input line for carrying the three-phase effluent from a liquid collection device located at or near a dental chair to the particulate collection vessel.
21. The system of Claim 20, further comprising
a liquid treatment device for removing and/or stabilizing a contaminant in the liquid phase to form a treated liquid phase.
22. The system of Claim 20, wherein the particle collection vessel includes one or more baffles.
23. The system of Claim 20, further comprising a timer connected to a pump on the first discharge line to cause periodic removal of the liquid phase from the vessel.
24 The system of Claim 20, wherein the liquid treatment device includes one or more chemical dosers that contact one or more of a pH adjustor, an oxidant, a reductant, and a precipitant with the liquid phase
25. The system of Claim 20, wherein the liquid is contacted with one or more precipitants prior to discharging the liquid.
26. The system of Claim 25, wherein the precipitant is a sulfide, thioamide, or thiocarbamate.
27. The system of Claim 20, wherein the liquid treatment device includes one or more sorbent columns that contact the liquid phase with one or more sorbents