Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment. Impact of design and operation on treatment goals
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Dateien
Autor:innen
Sauter, Daniel
Dabrowska, Agata
Bloch, Robert
Stapf, Michael
Miehe, Ulf
Sperlich, Alexander
Gnirss, Regina
Autor:in (Körperschaft)
Publikationsdatum
2021
Typ der Arbeit
Studiengang
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
Environmental Science. Water, Research & Technology
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
2021
Ausgabe / Nummer
7
Seiten / Dauer
197-211
Patentnummer
Verlag / Herausgebende Institution
Royal Society of Chemistry
Verlagsort / Veranstaltungsort
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
Ozonation followed by biological post-treatment is an established technology for abatement of organic micropollutants (OMP) from municipal wastewater. Although the necessity of biological post-treatment for oxidation by-product (OBP) removal is widely accepted, there is still discussion about the appropriate design and operation. The presented pilot-study investigates the impact of filter material and contact time on the removal efficiency of bulk organics, OMP, and OBP in three different deep-bed filters operated in parallel as post-treatment after ozonation (biological activated carbon (BAC) filter, dual-media filter sand/BAC and dual-media filter sand/anthracite). The use of BAC instead of non-adsorptive filter material resulted in higher removal of DOC and dissolved oxygen which indicates increased biological activity. Moreover, both BAC containing filters showed additional removal for a number of OMP even at high treated bed volumes of >50 000 whereas no removal was observed in the sand/anthracite filter. Analysis of N-nitrosodimethylamine (NDMA) and several carbonyl compounds revealed a clear formation of these biodegradable OBP during ozonation. A strong correlation was found between carbonyl formation and the specific ozone dose. Removal of OBP in the sand/BAC and the sand/anthracite filter was tested at different empty bed contact times (EBCT). While NDMA was efficiently removed independent of EBCT changes, there was a slightly negative impact of shorter EBCT on the reduction of carbonyl compounds. Furthermore, it was demonstrated that the integration of enhanced phosphorus removal into post-treatment is feasible with relatively low efforts by inline coagulant dosing (FeCl3) in the filter influent.
Schlagwörter
water, filtration, ozonation, wastewater, water pollutants
Fachgebiet (DDC)
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
2053-1419
2053-1400
2053-1400
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Ja
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Hybrid
Lizenz
Zitation
WINTGENS, Thomas, Daniel SAUTER, Agata DABROWSKA, Robert BLOCH, Michael STAPF, Ulf MIEHE, Alexander SPERLICH und Regina GNIRSS, 2021. Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment. Impact of design and operation on treatment goals. Environmental Science. Water, Research & Technology. 2021. Bd. 2021, Nr. 7, S. 197–211. DOI 10.1039/d0ew90056g. Verfügbar unter: https://doi.org/10.26041/fhnw-4108