Investigation of Electro coagulation Process on TSS and COD Removal from Effluent of the Paper Recycling Mill Using Al Electrodes

Theaim of this research was investigation on the performance of an electrocoagulation process with aluminum sacrificial anode for removal of TSS and COD from effluent of a paper recycling mill. The effect of electrolysis time (10، 20، 30 and 60 min)، initial electrolyte pH (3، 5، 7. 5 and 10)، and voltage (9 and 12V) were studied on the electrocoagulation efficiency. Increase of voltage from 9 to 12 V caused significantly removal of TSS and COD whichthe highest removal rate at 12 voltages for TSS and COD were 99%، and 77%، respectively، while the values for the same parameters at voltage 9 were 97% and 33%. The results also show that the initial pH of effluent has a key role in process efficiency so that in neutral limit the TSS and COD removal was more than the other pHs. It can be concluded that EC technique can be used as a simple and efficient method for treatment of paper recycling mill effluent and thereby pollution reduction.