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

Ataberk, S
Gökçay, Celal Ferdi
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.


Removal of chlorinated organics from pulping effluents by activated sludge process
Ataberk, S; Gökçay, Celal Ferdi (1997-03-01)
Combined effluents of a Kraft pulp mill using yearly plants were treated in a lab-scale activated sludge system. Average TOC and AOX removal efficiencies were 83% and 21% respectively. The effect of the operating solids retention time (SRT) on AOX removal was investigated and it was found that highest AOX removal (30%) occurs at longer SRT's. Mass balance on the system revealed that the principal AOX removal mechanism was metabolization at long SRT. About 90% of the AOX removed was metabolized. As SRT was l...
Treatment of organic chlorine in pulping effluents by activated sludge
Demirbas, G.; Gokcay, C.F.; Dilek, Filiz Bengü (1998-09-25)
A model activated sludge (AS) plant was fed by pulping effluents from a straw and reed processing paper works. The model was initially operated to simulate a dedicated treatment plant by continuously receiving chlorinated effluents from the pulp bleachery. In this simulation cycle the model activated:sludge was seeded only once during start-up and did not receive any domestic sewage after that. A carbon source was added in some of the experiments to bring up the organic content. In the second simulation cyc...
Treatment of olive mill wastewater by different physicochemical methods and utilization of their liquid effluents for biological hydrogen production
Eroglu, Ela; Erolu, Inci; Gündüz, Ufuk; Yucel, Meral (2009-04-01)
in this study various two-stage processes were investigated for biological hydrogen production from olive mill wastewater (OMW) by Rhodobacter sphaeroides O.U.001. Two-stage processes consist of physicochemical pretreatment of OMW followed by photofermentation for hydrogen production. Explored pretreatment methods were chemical oxidation with ozone and Fenton's reagent, photodegradation by UV radiation, and adsorption with clay or zeolite. Among these different two-stage processes, strong chemical oxidants ...
Sequence of microbial, populations associated with the treatment of pulping effluents in a model activated sludge plant
Demirbas, GG; Gokcay, CF; Dilek, Filiz Bengü (1998-11-01)
A model activated sludge (AS) plant receiving pulping effluents was operated on two modes. One mode was the treatment in a dedicated plant receiving no inflow other than pulping effluents, seeded during start-up, and receiving a supplemental carbon source. The second mode was the co-treatment of pulping effluents with the municipal sewage, continuously seeded both by microorganisms and organics. Higher Adsorbable Organic Halide (AOX) removal was obtained at lower Solids Retention Times (SRTs) in the co-trea...
Treatment of pulping effluents by using alum and clay - Colour removal and sludge characteristics
Dilek, Filiz Bengü (2001-01-01)
The effect of clay addition during alum coagulation, on the removal of colour from pulp-and-paper industry wastewaters, was investigated. Four types of clay, namely beige-and brown-sepiolites, calcium- and sodium-bentonites of different mesh sizes were used, Different quantities of alum and clay were applied, either singly or in combination, to the effluents of the wood-based pulp-and-paper mill. Colour of the treated wastewater, the sludge volume index (SVI) and sludge cake resistance (SCR) of the sludge p...
Citation Formats
S. Ataberk and C. F. Gökçay, “Treatment of chlorinated organics in bleached Kraft mill effluents by activated sludge process,” WATER SCIENCE AND TECHNOLOGY, pp. 147–150, 1997, Accessed: 00, 2020. [Online]. Available: