Comparison of Ethinylestradiol and Nitrogen Removal in a Conventional and Simultaneous Nitrification-Denitrification Membrane Bioreactor

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Date
2011-04-12T15:13:41Z
Authors
Paetkau, Michelle
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Abstract
The purpose of this thesis was to compare ethinylestradiol (EE2) and nitrogen removal in a conventional membrane bioreactor (C-MBR) and a simultaneous nitrification-denitrification membrane bioreactor (SND-MBR). Two MBRs were operated in parallel for 450 days; various MBR operating parameters, total nitrogen removal, and estrogenic activity removal (EA) were measured. The SND-MBR was able to remove 59% of influent TN with an additional 21% removed via sludge wasting; the C-MBR had a TN removal efficiency of only 31%. The C-MBR and SND-MBR removed 57% and 58% of influent EA, respectively. Biodegradation was the dominant removal mechanism for both reactors with KBIO coefficients of 1.5 ± 0.6 and 1.6 ± 0.4 days-1 for the C-MBR and the SND-MBR, respectively. Adsorption removed approximately 1% of influent EA in each reactor. This indicates that SND was able remove greater amounts of TN with no observable impact on EA reduction and membrane operations.
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Keywords
nitrogen, membrane bioreactor, simultaneous nitrification-denitrification
Citation
Paetkau, Michelle. Cicek, Nazim (2011). Comparison of nitrogen removal and sludge characteristics between a conventional and a simultaneous nitrification-denitrification membrane bioreactor. Desalination, Article in Press. DES10534