Application and Assessment of Enhanced Electrolytic Process for Laundry Wastewater Treatment

In this research, an enhanced electrolytic process was applied and evaluated for the treatment of laundry wastewater. Treatability of the process as well as the analyses of by-product was also conducted. Most organics in laundry wastewater were formed of suspended solids and they were removed successfully by electro-coagulation mechanism. The TKN was removed completely in a very shorter retention time of three minutes; in particular, the removal of overall phosphorus was performed in only 1.4 minutes. The pH value increased whereas alkalinity decreased due to the carbonates eliminated during the electrochemical procedure. The ORP value declined because the copper electrode has oxidation-reduction half potential of -0.15V during being oxidized Cu to Cu2+. The sludge was by-product of the procedure, and its SVI was below 20mL/g. The sludge had a good settleability and it would be easy to liquid-solids separation. The aeration after electrolytic procedure was performed for two hours and it was sufficient solution for additional removal of organics and neutralization of pH value.