Removal of COD and surfactants from grey water by Fenton type processes

Abstract

Grey water is a kind of domestic wastewater including shower, bath, lavatory and laundry waters. Grey waters without faecal waste can be considered as alternative water sources in the place where water resources are limited. In the present study, the removals of COD, anionic and non-ionic surfactants from grey water via conventional (CFP) and modified (MFP) Fenton oxidation processes was experienced. It was determined that pH adjustment to acidic values is not required in CFP. The optimum operating conditions were determined as [Fe2+] = 50 mg/L, [H2O2] = 50 mg/L at pH 7.6 (original pH) in CFP and [ZVI] = 50 mg/L, [H2O2] = 50 mg/L at pH 3 in MFP, respectively. As a result, the CFP has been found to be a more efficient alternative treatment method for the treatment of grey water, compared to MFP.