Impact of Adding Sodium Chloride to Change of Turbidity and Iron Concentration on Treatment Waste Water Using Electrocoagulation Process

Abstract

The treatment waste water of electrical industry was investigated through electrocoagulation process. The study was conducted by flowing of 4,5 liters of waste water into the three cells of electrocoagulation process tank. Each cell is filled 1.5 liters of waste water without adding of sodium chloride (NaCl). The electrocoagulation process is carried out at a voltage of 12 V and interval time for observation of electric current, turbidity and iron cocentration in the water is done every 10 minutes. Subsequently, the same procedure was performed and added the sodium chloride with variation of weight of 0.5, 1.0 and 1.5 gram. To determine change value of electrical current, turbidity, metals pollutant was done using Ampere meter, turbidity meter and AAS respectively. The best conditions are recommended for use 0.5 gram of sodium chloride and 110 minutes for processing time. Under these conditions the voltage of 12 V and the current is 1.13 A. In this condition the turbidity can be removal from 44.10 to 2.35 NTU or 94.33 % and iron concentration from 1.21 to 0.29 mg/L or equal to 76.03 %. In conclusion adding of sodium chloride in simultaneous process of electrocoagulation and strerilization can cause increase of the electric current and accelerate the removal of pollutants in the wastewater.