The effect of pre-ozonation on the H2O2/UV-C treatment of raw and biologically pre-treated textile industry wastewater


Alaton I. , Balcioglu I.

WATER SCIENCE AND TECHNOLOGY, vol.45, no.12, pp.297-304, 2002 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 45 Issue: 12
  • Publication Date: 2002
  • Title of Journal : WATER SCIENCE AND TECHNOLOGY
  • Page Numbers: pp.297-304

Abstract

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 O-3 + H2O2/UV-C oxidation enhanced the COD and TOC removal efficiency of the H2O2 (50mM)/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(10mM)/UV-C treatment system from 15% to 62%, and TOO removal from 0% to 34%, but did not appear to be more effective than applying a single ozonation process in terms of TOO 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.