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Comparison of sulfonated and other micropollutants removal in membrane bioreactor and conventional wastewater treatment

AuthorsDe Wever, Heleen; Weiss, Stefan; Reemtsma, Thorsten; Vereecken, Johan; Müller, Jutta; Knepper, Thomas P.; Rörden, Ocke; González Blanco, Susana; Barceló, Damià ; Hernando, María Dolores
KeywordsMembrane bioreactors
Polar micropollutants
Trace organics
Domestic wastewater
Issue Date5-Jan-2007
CitationWater Research 41(4): 935-945 (2007)
AbstractMembrane bioreactors (MBRs) were compared with conventional activated sludge systems (CAS) for micropollutant degradation, in laboratory-scale spiking experiments with synthetic and real domestic wastewater. The target micropollutants were polar in nature and represented a broad range in biodegradability. The experimental data indicated that MBR treatment could significantly enhance removal of the micropollutants 1,6- and 2,7-naphthalene disulfonate (NDSA) and benzothiazole-2-sulfonate. 1,5-NDSA, EDTA and diclofenac were not removed in either the MBR or the CAS. The other compounds were equally well degraded in both systems. For 1,3-naphthalene disulfonate, the existence of a minimum threshold level for degradation could be demonstrated. Although MBRs could not always make a difference in the overall removal efficiencies achieved, they showed reduced lag phases for degradation and a stronger memory effect, which implies that they may respond quicker to variable influent concentrations. Finally, micropollutant removal also turned out to be less sensitive to system operational variables.
Description11 pages, 5 figures, 3 tables.-- PMID: 17207834 [PubMed].-- Printed version published Feb 2007.
Publisher version (URL)http://dx.doi.org/10.1016/j.watres.2006.11.013
Appears in Collections:(IDAEA) Artículos
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