The effect of pre-ozonation on the H2O2/UV-C treatment of raw and biologically pre-treated textile industry wastewater.
Advanced chemical oxidation of raw and biologically pretreated wastewater by ozonation, H2O2/UV-C treatment and the successive combination of ozonation and H2O2/UV-C oxidation was investigated. For the raw textile wastewater, the application of successive O3 + H2O2/UV-C oxidation enhanced the COD and TOC removal efficiency of the H2O2 (50 mM)/UV-C process by a factor of 13 and 4, respectively. In case of the biotreated textile wastewater, the preliminary ozonation step increased COD removal of the H2O2 (10 mM)/UV-C treatment system from 15% to 62%, and TOC removal from 0% to 34%, but did not appear to be more effective than applying a single ozonation process in terms of TOC abatement rates. Enhancement of the biodegradability was more pronounced for the biologically pre-treated wastewater with a two fold average increase in the BOD5/COD ratio for the studied chemical oxidation systems.
Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 80626 Maslak-Istanbul, Turkey. arslanid@itu.edu.tr
I Arslan
IA
Alaton
I A
IA
Balcioğlu
D001673:Biodegradation, Environmental; D006861:Hydrogen Peroxide / Q000737:chemistry; D009930:Organic Chemicals / Q000378:metabolism; D016877:Oxidants / Q000737:chemistry; D010083:Oxidants, Photochemical / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D013783:Textile Industry; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014876:Water Pollution / Q000517:prevention & control; D018508:Water Purification / Q000379:methods*
D009930:Organic Chemicals; D016877:Oxidants; D010083:Oxidants, Photochemical; D010126:Ozone; D006861:Hydrogen Peroxide