AbstractReaction kinetics during electrochemical treatment of deproteinated whey wastewater (DWW) and fruit juice factory wastewater (FJW) was investigated in a stirred batch electrochemical reactor under reaction conditions of 100% wastewater concentration and 11.29 V applied voltage at room temperature using cost-effective iron electrodes. Reaction mediums for electrochemical treatment of DWW and FJW were supplemented with 19.87 and 5.95 g L−1 NaCl as supporting electrolyte, respectively. Kinetic investigations denoted that reaction orders (n) of both reactions were 0.6. Specific reaction rate constants (k) at 25°C of electrochemical DWW and FJW treatment reactions were 0.04 and 1.21 mg0.6 L−0.6 min−1. Activation energies (Ea) and Arrhenius constants (A) were calculated as 41.60–9.59 kJ mol−1 and 740.93–61.82 mg0.6 L−06 min−1 for DWW and FJW, respectively. In our study, relatively fast reaction kinetics values were obtained compared to the data previously reported for electrochemical wastewater treatmen...