Treatment of chlorinated organics in bleached Kraft mill effluents by activated sludge process

Ataberk S., Gokcay C.

WATER SCIENCE AND TECHNOLOGY, vol.36, pp.147-150, 1997 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 36
  • Publication Date: 1997
  • Doi Number: 10.1016/s0273-1223(97)00381-8
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.147-150
  • Keywords: bleached Kraft mill effluents, activated sludge, AOX, biodegradation, WASTE-WATER, HALIDE REMOVAL, AERATED LAGOON, AOX REMOVAL, PULP
  • Middle East Technical University Affiliated: Yes


Combined effluents from a bleached Kraft pulp mill using annual plants were treated in a lab-scale activated sludge (AS) system. The effects of operating solids retention time (SRT) and concentration of additional carbon source on AOX removal were investigated. Higher AOX removals (30%) were observed with long SRTs, 99% of which was pure metabolization. As SRT was decreased AOX removal efficiency also decreased (4%) and principal AOX removal mechanism changed to adsorption onto wasted biomass. The AOX removal efficiency was lower (10%) on a 20% decrease in the supplemental carbon source, with no apparent effect on the removal mechanism. (C) 1997 IAWQ. Published by Elsevier Science Ltd.