Biotreatability enhancement of aqueous Reactive Black 5 by hydrogen peroxide/ultraviolet advanced oxidation process


Dokuzoglu Z., ALKAN U.

COLORATION TECHNOLOGY, vol.126, no.5, pp.308-314, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 126 Issue: 5
  • Publication Date: 2010
  • Doi Number: 10.1111/j.1478-4408.2010.00262.x
  • Journal Name: COLORATION TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.308-314
  • Bursa Uludag University Affiliated: Yes

Abstract

The efficiency of ultraviolet/hydrogen peroxide photo-oxidation processing for enhancing the biodegradability of Reactive Black 5 prior to biological treatment processing of acclimated and non-acclimated sequencing batch reactors was evaluated. Photo-oxidation experiments were conducted according to an experimental design method in which aqueous Reactive Black 5 samples with an initial concentration of 200 mg/l were exposed to ultraviolet irradiation for 15, 30 and 60 min in the presence of various concentrations of hydrogen peroxide (250, 500 and 1000 mg/l) at pH 7. Pretreated samples were then subjected to respirometric biodegradability tests using the sludge cultures obtained from acclimated and non-acclimated sequencing batch reactors for the determination of the kinetic constants of q(max) and K(s) according to the modified Organisation of Economic Cooperation and Development 209 method. Calculated values of q(max) and K(s) showed that the acclimated sludge of the sequencing batch reactor showed a better performance than the non-acclimated sludge in the degradation of photochemically pretreated aqueous Reactive Black 5. The advantage of acclimated sludge compared with non-acclimated sludge for the biodegradation of Reactive Black 5 diminished when photochemical pretreatment conditions reached higher levels in terms of oxidation time and hydrogen peroxide concentration.