Treatment of organic chlorine in pulping effluents by activated sludge

Demirbas, G.
Gokcay, C.F.
Dilek, Filiz Bengü
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 cycle the pulping effluent was co-treated with municipal sewage. In this case the activated sludge unit:was being continuously dosed by microorganisms and the organics present in the sewage. A higher organic chlorine (AOX) removal was obtained at shorter SRTs in the co-treatment AS. High AOX removal was achieved at longer SRTs in the dedicated, once-seeded AS. The AOX removal mechanism was mineralization in both cycles. (C) 1999 Published by Elsevier Science Ltd on behalf of the IAWQ. All rights reserved.


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 chlorinated organics in bleached Kraft mill effluents by activated sludge process
Ataberk, S; Gökçay, Celal Ferdi (1997-01-01)
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 remov...
Removal of Crystal Violet and Eriochrome Black T Dyes from Aqueous Solutions by Magnetic Nanoparticles Biosynthesized from Leaf Extract of Fraxinus Chinensis Roxb
Ali, Imran; Peng, Changsheng; Khan, Zahid M.; Sultan, Muhammad; Naz, Iffat; Ali, Mohsin; Farid, Hafiz U.; Mahmood, Muhammad H.; Ahsen, Rameez (HARD Publishing Company, 2019-01-01)
In the present research, a "green" recipe was used to produce innovative phytogenic magnetic nanoparticles (PMNPs) from leaf extract of Fraxinus chinensis Roxb without employing any additional toxic surfactants as capping agents. The convenient reaction between metal salt solution and plant biomolecules occurred within a few minutes by color changes from pale green to intense black, hinting at the production of magnetic nanoparticles (MNPs). The formation of PMNPs was verified by employing different techniq...
Production and characterization of activated carbon from pistachio-nut shell
Özsin, Gamzenur; Yücel, Hayrettin; Behlülgil, Ahmet Kemal; Department of Chemical Engineering (2011)
In this study production and characterization of activated carbon from an agricultural waste, pistachio-nut shells, was investigated. To determine optimum production conditions by chemical activation method, effect of tempreature (300, 500, 700 and 900 oC) and effect of impregnation ratio (1:1, 2:1 and 3:1 as activation agent:sample) were investigated by applying two different methods (raw material activation and char activation) and with two different activation agents (phosphoric acid and potassium hydrox...
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 ...
Citation Formats
G. Demirbas, C. F. Gokcay, and F. B. Dilek, “Treatment of organic chlorine in pulping effluents by activated sludge,” 1998, vol. 40, Accessed: 00, 2020. [Online]. Available: