Removal of TOC from fertilizer production wastewater by electrooxidation
AbstractTreatment of fertilizer production wastewater was investigated by electrooxidation (Eox) process using graphite as the anode electrode and NaCl as the supporting electrolyte. In the studies, graphite anode and titanium cathode electrodes were used in direct oxidation, and together with the addition of NaCl, direct oxidation and indirect oxidation were applied to break the polluters and, therefore, remove total organic carbon (TOC) from fertilizer production wastewater. The effects of operating conditions such as pH, supporting electrolyte (NaCl), current density, and time on the removal efficiency of TOC were investigated. In addition, the specific energy consumption (SEC) for TOC removal performance was calculated. The experimental results showed that at pH 4, 8,000 mg/L NaCl, 360 min. and 62.5 mA/cm2 applied current density for an initial TOC 950 mg/L, TOC removal, and SEC were found to be 82.1% and 492.3 kWh/kg TOCrem, respectively. According to these results, the supporting electrolyte (NaCl) ...