Patent ID: 7981301

Claim:
A method of treating a contaminated liquid, said method comprising: providing a tank having an upper portion, and a smaller lower portion, said tank further having an inlet for receiving a flow of liquid and an outlet for removing liquid from the tank by vacuum force; providing an electrocoagulation unit upstream of said tank, said electrocoagulation unit having an overflow weir integral with said inlet of said tank to provide a flow of the liquid into said tank; conducting electrocoagulation in said electrocoagulation to treat the liquid conducting clarification and filtration in said tank to further treat the liquid; delivering solids recovered in said tank from a solids outlet of the tank to a downstream treatment station; said downstream treatment station including removing liquid from the recovered solids in a filter press and a clarifier tank; and conveying the liquid from the recovered solids upstream of the electrocoagulation unit and into a chamber of the electrocoagulation unit for further treatment.