Ethinylestradiol removal in a conventional and a simultaneous nitrification-denitrification membrane bioreactor

The removal of a synthetic estrogen 17α-ethinylestradiol (EE2) was investigated in submerged membrane bioreactors (MBRs) with simultaneous nitrification-denitrification (SND) and conventional nitrification. The influent EE2 concentration was 500 ng/L as EE2. Using a yeast estrogen screen test, the c...

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Veröffentlicht in:Water science and technology 2011-01, Vol.64 (12), p.2333-2337
Hauptverfasser: Paetkau, M, Yang, W, Cicek, N
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Yang, W
Cicek, N
description The removal of a synthetic estrogen 17α-ethinylestradiol (EE2) was investigated in submerged membrane bioreactors (MBRs) with simultaneous nitrification-denitrification (SND) and conventional nitrification. The influent EE2 concentration was 500 ng/L as EE2. Using a yeast estrogen screen test, the conventional-MBR (C-MBR) and SND MBR (SND-MBR) removed 57 and 58% of the estrogenic activity (EA) respectively; there was no significant difference in their removal efficiencies. Biodegradation was the dominant removal mechanism for both reactors with K(BIO) coefficients of 1.5 ± 0.6 and 1.6 ± 0.4 day(-1) for the C-MBR and the SND-MBR respectively. Sorption to solid particles removed approximately 1% of influent EA in each reactor; the particle partitioning coefficient, K(D), was calculated to be 0.21 ± 0.07 L/(g MLSS) for the C-MBR and 0.27 ± 0.1 L/(g MLSS) for the SND-MBR. These findings suggest that conditions favoring SND in MBRs have no significant impact on EA reduction.
doi_str_mv 10.2166/wst.2011.784
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identifier ISSN: 0273-1223
ispartof Water science and technology, 2011-01, Vol.64 (12), p.2333-2337
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1996-9732
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source MEDLINE; EZB Electronic Journals Library
subjects Biodegradation
Bioreactors
Coefficients
Denitrification
Estrogenic activity
Estrogens
Ethinyl Estradiol - chemistry
Ethinylestradiol
Influents
Membranes, Artificial
Nitrification
Oestrogens
Reactors
Removal
Sex hormones
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Water Pollutants, Chemical - chemistry
Water Purification - methods
Xenoestrogens
Yeast
Yeasts
title Ethinylestradiol removal in a conventional and a simultaneous nitrification-denitrification membrane bioreactor
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