Application of Electrooxidation Technology in the Treatment of Paper Industry Wastewater: The Effect of pH and Current Density

Abstract

In the studies, the treatment of wastewater from the paper industry using the electrooxidation method one of the electrochemical treatment methods in the batch system was explored under various experimental settings. 4 anodes and 4 cathodes sieve type plates with dimensions of 7 cm x 10 cm were placed at 0,5 cm intervals in the 2000 mL volume jacketed glass reactor used for the treatment of wastewater originating from the paper industry, and 1200 mL wastewater was used in the experiments. In the electrooxidation experiments, coated sieve type Ti/Pt electrodes were used as the anode material, and uncoated sieve type Ti electrodes were used as the cathode material. The active anodic wet surface area was calculated as 1078 cm2 . Removal rates of pollutant parameters such as color and SS (Suspended Solids) in the experiments; The effects of wastewater initial pH value and current density parameters were investigated. According to the results obtained, for Ti/Pt anode type; Wastewater natural pH (~7.5) was determined as the most effective pH value at 400 rpm mixing speed, and 18.55 mA/cm2 was determined as the most effective current density. For Ti/Pt anode in optimum conditions; 96.92% Suspended Solids and 96.12% color removal efficiencies were obtained.