ELECTRO COAGULATION & ELECTRO OXIDATION METHOD

TO REMOVE THE POLLUTATNT FROM WASTE WATER

The Electro Coagulation mechanism was discussed  with aluminum electrode. Most agree that the metal cations released by the anode lead to the formation of metallic hydroxides that show low solubility and easily precipitate; as a result, contaminants can physically or chemically adsorb on the precipitates. In general, it is accepted that the EC process involves three successive stages: (a) formation of coagulants by electrolytic oxidation of the "sacrificial electrode"; (b) destabilization of contaminants, particle suspension and emulsions breakage; (c) aggregation of destabilized phases to form flocs. Floc formation, as a result of coagulation, creates a layer of mud that traps and unites colloidal particles that have not been complexed.

The purpose of this study is to evaluate the operation of electrocoagulation for treating effluent generated by a gelatin producer, which contains high load of COD and a large quantity of TSS. Because the effluent from the industrial plant was treated with aluminum salts, we use the aluminum electrodes. This allow as to compare electrocoagulation process with chemical coagulation operations using the same ion flocculant (Al+3), and the determination of the influence on electrocoagulation with pH in the COD, turbidity and TSS removal efficiency. In addition, surface analysis techniques were used to study the precipitate in order to confirm a mechanism to remove pollutants from the wastewater.