Comparative study of industrial and laboratory prepared purified terephthalic acid (PTA) waste water with electro-coagulation process

In the present work, the treatment of PTA (purified terephthalic acid) for synthetic and actual waste water was executed by electrochemical (EC) technique using stainless steel (SS) as electrode material in a batch reactor. A fully factorial central composite design (CCD) with four different parameters specifically PH: 3.60-10.40, current density (A/m2): 31.25-156.25, reaction time (min): 30-250, inter-electrode distance (cm): 0.5-2.5, all these parameters at five different levels were performed to optimize the aspect for higher % COD removal. The optimum % COD removal (pH - 8.2, time 180 min, C.D. 125 A/m2 and inter electrode distance 1 cm) was 70.86% for synthetic and 66.72% for actual waste water as a set of 30 runs were performed for both the type of waste waters.