Determining the Reaction Rate of Electrochemical Process for Purification of Polluted Water

Aims Turbidity in higher than standard levels, indicates failure in the water treatment plant.An electrochemical disinfection process takes place through electricity transition betweentwo or more electrodes. This research aimed to determine the reaction rate of electrochemicalprocess for purification of polluted water.Materials & Methods This is a bench scale, experimental study performed in a batch systemon synthetic wastewater. 1700ml of prepared synthetic wastewater was put in an electrolyticcell and constant 600mA current was flowed into the cell content through merged aluminumelectrodes for 1 hour. Samples were taken from the batch in the beginning and every 10minutes and were analyzed for, turbidity, Coliform bacteria (probably, confirmed and E. coli)and Heterotrophic Plat Count. Fisher exact test was used to analyze data.Findings All the parameters of turbidity, HPC, total coliform, confirmed coliform and E.coli were decreased during the time. The electrochemical process reduced the average ofturbidity below 3NTU after 50 minutes (91.05% removal). The HPC number reduced from130n/ml to 2.4n/ml (98.15% removal) after 50 minutes. No coliforms were seen after 40minutes of the electrochemical process.Conclusion 40 minutes of electrochemical process in 600mA by aluminum electrodes is theoptimum condition for removing the turbidity, Coliform bacteria (total, confirmed and E.coli) and HPC from polluted water.

کلیدواژه ها:

Water ، Electrochemical Techniques ، Enterobacteriaceae