Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
1998-12-11
2001-01-30
Phasge, Arun S. (Department: 1741)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C204S269000, C204S275100
Reexamination Certificate
active
06179977
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
This invention relates to process equipment and method of treating contaminated water and wastewater and more particularly, but not by way of limitation, to insitu process equipment using an electrochemical treatment of the water for dropping out various types of contaminates such as metals and other compounds held in suspension.
(b) Discussion of Prior Art
In U.S. Pat. Nos. 4,293,400 and 4,378,276 to Liggett, an apparatus with a positively charged aluminum electrode and a negatively charged tubular steel electrode are disclosed for the electrolytic treatment of water. In U.S. Pat. No. 5,587,057 to Metzler et al., an electrocoagulation process is described having electrolytic treaters for treating a highly conductive liquid media.
In U.S. Pat. No. 4,872,959 to Herbst et al., U.S. Pat. Nos. 5,043,050 and 5,423,962 to Herbst, the inventor of the subject invention, Robert J. Herbst describes different types of improved electrolytic systems for treating aqueous solutions using conductive conduits and precipitating various organic and inorganic materials suspended in the solution.
None of the above mentioned prior art electrolytic treatment systems of liquids disclose or teach the use of the subject electrochemical process equipment and method of treating contaminated water insitu in a pit or lagoon such as a oil drilling reserve pit.
SUMMARY OF THE INVENTION
In view of the foregoing, it is a primary object of the invention to treat contaminated water and wastewater for separating various types of contaminates from the water in a pit or lagoon.
Another object of the subject process equipment is to treat the contaminated water insitu and without having to pump the contaminated water from the pit or lagoon.
Still another object of the insitu process equipment is to use a minimum of equipment for removing both suspended and dissolved solids in the water and allow the treated water to be decanted from the pit or lagoon for reuse or discharge.
Yet another object of the process equipment is to remove various contaminates from the water such as suspended metals, hydrocarbons and gases. Also, bacteria, viruses, cysts and algae can be destroyed electrochemically and removed via precipitation.
The process equipment includes a floatation device in the form of a plurality of lightweight foam filled barrels rotatably mounted on drum axles. The drum axles are attached to an elongated barrel frame. A pair of electrode assemblies with a plurality of electrodes are attached to opposite sides of the barrel frame. The electrode assemblies are pivotly mounted on the barrel frame for lowering the electrodes below the water level when the process is in operation. An electrode cable guide is mounted on top of the barrel frame and the barrels for holding electrode cables. One end of the electrode cables is attached to opposite ends of the electrode assemblies. The other end of the electrode cables is attached to a power supply, such as a generator, resting on the shore and next to the pit or lagoon. The power supply provides direct current via the cables to the electrodes with the polarity of the current cycle reversed periodically depending on the types of water contaminates being treated. When the cycle is reversed, the contaminants gathered on the electrodes typically fall to the bottom of the pit as precipitated solids.
These and other objects of the present invention will become apparent to those familiar with the electrochemical or electrocoagulation treatment of contaminated water when reviewing the following detailed description, showing novel construction, combination, and elements as herein described, and more particularly defined by the claims, it being understood that changes in the embodiments to the herein disclosed invention are meant to be included as coming within the scope of the claims, except insofar as they may be precluded by the prior art.
REFERENCES:
patent: 4337136 (1982-06-01), Dahlgren
patent: 5085753 (1992-02-01), Sherman
patent: 5256263 (1993-10-01), Kanai
Crabtree Edwin H.
Current Water Technology, Inc
Margolis Donald W.
Phasge Arun S,.
Pizarro Ramon L.
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