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Elimination of micropollutants in activated sludge reactors with a special focus on the effect of biomass concentration

Hatoum, R. 1,2; Potier, O.; Roques-Carmes, T.; Lemaitre, C.; Hamieh, T.; Toufaily, J.; Horn, H. 1,2; Borowska, E. 1,2
1 Engler-Bunte-Institut (EBI), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

This study aimed to investigate the effects of sludge retention time (SRT), hydraulic retention time (HRT), and biomass concentration (CTSS) in activated sludge systems on removal of various micropollutants (MPs), covering a wide spectrum of biodegradability. The influence of biomass concentration on the classical pseudo-first-order rate constant was verified. Results showed that the removal rate constants were affected by both the HRT and SRT. The enhancement of the SRT increased the removal of all the MPs except for two macrolide antibiotics. Application of a higher HRT also improved MP removal, as was expected from the measured removal rate constants. More interesting, our results indicated that, logically, the increase of biomass concentration (expressed as total suspended solids CTSS) from 3 to 5 gTSS L−1 significantly enhanced the removal rate of the highly and moderately degradable compounds. Conversely, a further increase to 8 gTSS L−1 produced only an unexpected moderate effect, showing that the rate was not proportional to biomass concentration, contrary to what is generally postulated. Therefore, the use of classical kinetic models is questionable, since they do not cover the entire range of boundary conditions in activated sludge systems. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000100835
DOI: 10.3390/w11112217
Zitationen: 26
Zitationen: 29
Cover der Publikation
Zugehörige Institution(en) am KIT DVGW - Technologiezentrum Wasser (TZW)
Universität Karlsruhe (TH) – Einrichtungen in Verbindung mit der Universität (Einrichtungen in Verbindung mit der Universität)
Engler-Bunte-Institut (EBI)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2073-4441
KITopen-ID: 1000100835
Erschienen in Water
Verlag MDPI
Band 11
Heft 11
Seiten Article No.2217
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Gefördert vom Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg (MWK) im Rahmen des Open-Access-Förderprogramms "BW BigDIWA"
Vorab online veröffentlicht am 24.10.2019
Schlagwörter micropollutants; activated sludge; biomass concentration; sludge retention time; hydraulic retention time; sequencing batch reactor; wastewater; emerging contaminants
Nachgewiesen in Dimensions
Web of Science
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