Ozonation in advanced treatment of secondary municipal wastewater effluents for the removal of micropollutants

Serdar Dogruel*, Zuhal Cetinkaya Atesci, Egemen Aydin, Elif Pehlivanoglu-Mantas

*Bu çalışma için yazışmadan sorumlu yazar

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18 Atıf (Scopus)

Özet

The objective of this study was the experimental evaluation of ozonation as an additional treatment step for the removal emerging contaminants from secondary effluents of two wastewater treatment plants (WWTPs), one receiving a primarily domestic wastewater (WWTP-A), and the other one domestic sewage together with pretreated tannery wastewater streams (WWTP-B). The experimental runs were conducted at two different pH values (i.e., original pH and adjusted pH of 10) and at six different ozone doses ranging between 0.2 and 1.5 mg O3/mg DOC. A total of 20 compounds, including 12 micropollutants (MPs) and 8 metabolites, were selected as the target analytes for the evaluation of ozonation performance. When the tested MPs and metabolites were considered individually, the maximum elimination level for each compound was reached at different doses; therefore, optimum ozone doses were determined based on the reduction of the total MP content. Ozonation at the original pH with an ozone dose in the range of 0.4–0.6 and 0.8–1.0 mg O3/mg DOC was selected as the optimum operating condition for WWTP-A and WWTP-B, respectively, both resulting in an average overall removal efficiency of 55%. Ozone treatment yielded only poor elimination for o-desmethyl naproxen (15%), which was found to be by far the main contributor accounting alone for approximately 30% of the total MP concentration in the secondary effluents. The systematic approach used in this study could well be adopted as a guide to other domestic and municipal WWTPs, which are thought to have a highly variable composition in terms of the MPs and metabolites.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)45460-45475
Sayfa sayısı16
DergiEnvironmental Science and Pollution Research
Hacim27
Basın numarası36
DOI'lar
Yayın durumuYayınlandı - Ara 2020

Bibliyografik not

Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

Finansman

This study was financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK, Project #114Y487) and Istanbul Technical University Research Fund (ITU-BAP, Project #39421). Acknowledgments The authors would like to thank the technical staff of Istanbul Water and Sewerage Administration (ISKI) for their assistance during the collection of samples.

FinansörlerFinansör numarası
ISKI
ITU-BAP39421
Istanbul Water and Sewerage Administration
TUBITAK114Y487
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Teknik Üniversitesi

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