In this research two types of electrochemical reactors for the treatment of simulated wastewaters containing Direct blue 71 azo dye (DB71) were used:(1) Laboratory scale undivided electrolysis cell system (450mL volume) with one 2cm× 2cm platinum plate as the anode placed in the middle of the cell and two 2cm× 8cm steel plates (SS-304) as cathodes placed in the sides of the cell 2cm from the central anode.(2) Pilot scale reactor (9L volume), equipped with two 3cm× 23cm stainless steel plates as anode and cathode, with distance
