Advantages of Electrocoagulation process for color removal in water treatment plant, they are using Electro Chemical (Electrocoagulation) process to remove the Color, COD, BOD and electrical conductivity by 80-90% in COD/BOD aspect and 20-35 % in Electrical Conductivity side.

Physico-chemical treatment, Coagulation and flocculation are traditional methods for the treatment of polluted water. In these processes, coagulating agents such as alum or ferric chloride and other additives such as polyelectrolytes are dosed to produce larger aggregates, which can be separated physically.

The electrochemical process is highly dependent on the chemistry of the wastewater,especially its conductivity.this is simple and efficient method for the treatment of water and many kinds of wastewater.

Raw effluent is collected in a beaker and insert two steel electrode.The electrodes were separated using an insulating material to maintain the desired electrode spacing.An DC Power is applied and monitor the current consumption,in few seconds of operation flocs will form form.

The power consumption of Electrochemical process is an vital role and needs to be monitored/ controlled,

To optimize the Electrocoagulation process the listed peculiar parameters are adjustable, So the system will work efficiently and economically.

Note: The flocs formation time will vary depends upon the following condition.

1. Potential difference between the electrodes, normally 12-24 V DC.

2. Surface area of electrodes to effluent volume ratio (S/V), normally it has 15-22M²/M³ effluent treatment

3.Inter-electrode spacing between electrodes 2-10mm possible.

4. Lowering the pH to 4 led to the highest mean power consumption. The lowering of the pH. further led to suitable conditions for ionization of wastewater and oxidation of iron to Fe2+ ions hence high power consumption The optimum pH with the lowest power consumption was pH 6

5. Effect of effluent temperature on power consumption:At higher temperatures, molecules gain kinetic energy and collisions between molecules are increased.hence Power consumption decreased with increase in temperatures from 20 to 35 Deg C,

6. Effect of Effluent Dilution:Due to lowest electrical conductivity while diluting the effluent, the power consumption become higher.

Disadvantage of the Electrocoagulation process:

1. Treated effluent pH will be increased.

2. Steel plate should be cleaned frequently using with acid

3. The Electrode i.e Steel plate is consumable items, which led to produce iron in the treated effluent.