Impact of ozonation and biological post. Treatment of municipal wastewater on microbiological quality parameters
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Autor:innen
Autor:in (Körperschaft)
Publikationsdatum
2021
Typ der Arbeit
Studiengang
Sammlung
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
7
Ausgabe / Nummer
Seiten / Dauer
1643-1656
Patentnummer
Verlag / Herausgebende Institution
Royal Society of Chemistry
Verlagsort / Veranstaltungsort
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
Ozonation is an established process for advanced wastewater treatment, with a dose-dependent degree of
disinfection. It is generally followed by biological post-treatment with the main objective of oxidation by-
product abatement. However, there is little research on the impact of the combination of ozonation and
biological post-treatment on microbiological quality parameters. This long-term study investigated pilot-
scale ozonation with six different filtration processes (4 deep-bed filter systems and 2 vertical flow
constructed wetlands) as biological post-treatment. A broad spectrum of microbial parameters has been
monitored for a comprehensive evaluation of the disinfection performance. While vegetative bacteria
(Escherichia coli and enterococci) were inactivated to a large extent by ozone, spore-forming Clostridium
perfringens and viral indicator somatic coliphages exhibited a high ozone tolerance and could only be
effectively retained in subsequent filtration steps. Extended hydraulic retention times as well as fine filter
materials in post-treatment proved to be beneficial for faecal indicator abatement. In deep-bed filters,
coagulant dosing was an additional important factor for the disinfection performance. Post-treatment also
played a crucial role in the reduction of the antibiotic resistance gene sul1 and the indicator genes intl1
(mobile genetic element) and 16S rRNA (total bacterial number), whereas inactivation of antibiotic resistant
bacteria was dominated by the ozonation process. In summary, the combined disinfection mechanisms of
ozonation (chemical) and filtration (physical) resulted in an effective abatement of a wider range of
microbial parameters than the individual processes. Regrowth during post-treatment has only been
observed for the parameters intact cell counts and Pseudomonas aeruginosa with mean concentration
increases of 0.5–1 log units.
Schlagwörter
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
Zukunftsfelder FHNW
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Closed
Lizenz
Zitation
Sauter, D., Stange, C., Schumacher, V., Tiehm, A., Gnirrs, R., & Wintgens, T. (2021). Impact of ozonation and biological post. Treatment of municipal wastewater on microbiological quality parameters. Environmental Science. Water, Research & Technology, 7, 1643–1656. https://doi.org/10.1039/d1ew00312g