Colour Removal By Electrogulation

Electro Coagulation offers on alternative to the use of metal salts or polymers and poly electrolyte addition for breaking stable emulsion and suspensions. The technology remove metals, colloidal solids and particles, and soluble inorganic pollutants from aqueous media by introducing highly charged polymeric metal hydroxide species. These species neutralize the electrostatic charges on suspended solids and oil droplets to facility agglomeration or coagulation and resultant separation from the aqueous phase. The treatment prompts the precipitation of certain metals and salts.

Electro Coagulation:

In its simplest form, on electro coagulation reactor is made up of on electrolytic cell with one anode and one cathode. When connected to on external power source. The anode material will electrically corrode due to oxidation, while the cathode will be subjected to passivation.

The CAK ECG system essentially consists of pairs of conductive metal plates in parallel, which act as monopole electrodes. It furthermore requires a DC power source, a resistance box to regulate the current density and a ammeter read the current values. The conductivity metal plates are commonly known as �Sacrificial electrodes�. The sacrificial anode lowers the dissolution potential of the same different materials.

During electrolysis, the positive side undergoes anodic reactions, while on the negative side, cathode reactions are encountered, Consumable metal plates, such as iron or aluminum are usually used as sacrificial electrodes to continually produce ions in the water. The released ions neutralize the charge of particles of particles and thereby initiate coagulation. The released ions remove undesirable contaminations either by chemical reaction and precipiatation, or by causing the colloidal to coalesce. This can be removed by flotation. In addition, as water containing colloidal particulates, oils, or other contaminants move through the applied electric field, there may be ionization, electrolysis, hydrolysis, and free radial formation which can alter the physical and chemical properties of water and contaminants. As a result, the excited state causes contaminants to be released from the water and destroyed or made less soluble.

Electro coagulation involves dissolution of metals from the anode with simultaneous formation of hydroxyl ions and hydrogen gas accruing at the cathode.

Electro coagulation has successfully treated a wide range of effluents streams.CAK has focused on the application of electro coagulation to a particular situation. On-site optimization and process tuning had unlimited success.