Killearn Lakes Plantation Restoration: Clean Lakes Project Tallahassee, Florida

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Electrochemical coagulation.
Aluminum and iron ions are required for coagulation in the water particles of colloidal contaminants can be obtained by electrochemical anodic dissolution of metallic aluminum and iron. To do this, water must pass through an electrolytic cell with the anodes of aluminum or iron. Meals are usually made from electrolytic dc sources.
Metal plates anode connected to the positive pole of a current source will ionize and thus go into solution as ions. If used in the electrolytic iron anodes, the water moving divalent iron ions. They help to reduce the negative charges of colloidal particles suspended and thereby create conditions for their coagulation. Transformed into a solution of ferrous iron with dissolved oxygen or chlorine if chlorinated water previously, is oxidized to form iron hydroxide. To some extent the oxidation of ferrous iron may contribute to the discharge occurring at the anode in the water chlorine ions, which is obtained as a result of atomic chlorine.
Aluminium in its anodic dissolution in the water goes in the form of trivalent ions of aluminum, so the use of aluminum anodes pre-chlorination is not required, except when it is necessary to destroy the protective colloids (eg, humates), complicating the process of coagulation, or for water disinfection .
Electricity consumption in the anodic dissolution of metal increases with increasing distance between the electrodes, increased current density and decreasing the velocity of water between the electrodes.
Coagulation of colloidal water pollution achieved a pass all or part of the water entering the treatment plant, through electrolysis. The latter are rectangular tanks, which are upright fixed or rotating plates of aluminum or iron.
To prevent contact between adjacent sheets of metal and education as a result of this closure between the sheets at the edges of the insulator gasket set (eg, rubber, phenolic, etc.).
Water is supplied to the electrolytic cells at the side or bottom so that it flowed between the sheets of metal, and withdrawn by means of prefabricated trays at the top of the cell.
The relatively high cost of metallic iron and aluminum in sheet form allows for the electrolytic dissolution of iron and aluminum products for water treatment plants only a small performance or, in cases where you do not enrich the water with sulfate or chloride, which is observed in the processing of water with salts of iron and aluminum.