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.
Research Article|July 01 1999
Treatment of organic chlorine in pulping effluents by activated sludge
G. (Goktayoglu) Demirbas
Water Sci Technol (1999) 40 (1): 275-279.
G. (Goktayoglu) Demirbas, C. F. Gokcay, F. B. Dilek; Treatment of organic chlorine in pulping effluents by activated sludge. Water Sci Technol 1 July 1999; 40 (1): 275–279. doi: https://doi.org/10.2166/wst.1999.0057
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