Enhancement of biodegradability by continuous ozonation in Acid Red-151 solutions and kinetic modeling

Gokcen F., Ozbelge T.

CHEMICAL ENGINEERING JOURNAL, vol.114, pp.99-104, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 114
  • Publication Date: 2005
  • Doi Number: 10.1016/j.cej.2005.09.006
  • Journal Name: CHEMICAL ENGINEERING JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.99-104
  • Middle East Technical University Affiliated: No

Abstract

In this work, continuous ozonation of aqueous Acid Red-151 was performed in a stirred tank reactor at neutral pH and 25 degrees C. The results show that ozonation is capable of a rapid conversion of the Acid Red-151 dye molecule to more biodegradable intermediates up to the ozonation time of 120 min at which the optimum BOD5/COD ratio is obtained. The peak BOD5/COD ratios were found to be in the range of 0.028-0.35 for the initial dye concentrations being in the range of 1000-100 mg/L, respectively.