INVESTIGATION TREATMENT OF THE CHOCOLATE INDUSTRIAL WASTEWATER BY ELECTROCOAGULATION PROCESS USING IRON ELECTRODES IN PILOT SCALE

The objective of the present work is to study the application of electrocoagulation technique in the treatment of Chocolate processing industries effluent .The experiments were carried out in a continuous process at pilot scale using iron (Fe) electrode. Effects of the process variables such as current density and operating time are investigated on Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Total Suspended Solid(TSS) and Fat , Oil and Grease reduction efficiencies. Current density was applied at a value of 7.2 and 20 mA /cm2, and operating time varies to 50 minutes. The results show that the reduction efficiencies of COD 65.6 % and 69.1 % , BOD 51.2% and 57.4% ,TSS 78.5% and81.4% , and FOG 81.2% and85 % . In addition, the experimental results also show that the electro-coagulation can neutralize pH of wastewater.

کلیدواژه ها:

Electrocoagulation ، COD ، BOD ، TSS ، FOG ، Current Density