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Photocatalytic ozonation in an immersion rotary body reactor for the removal of micro-pollutants from the effluent of wastewater treatment plants

  • Carrier-bound titanium dioxide catalysts were used in a photocatalytic ozonation reactor for the degradation of micro-pollutants in real wastewater. A photocatalytic immersion rotary body reactor with a 36-cm disk diameter was used, and was irradiated using UV-A light-emitting diodes. The rotating disks were covered with catalysts based on stainless steel grids coated with titanium dioxide. TheCarrier-bound titanium dioxide catalysts were used in a photocatalytic ozonation reactor for the degradation of micro-pollutants in real wastewater. A photocatalytic immersion rotary body reactor with a 36-cm disk diameter was used, and was irradiated using UV-A light-emitting diodes. The rotating disks were covered with catalysts based on stainless steel grids coated with titanium dioxide. The dosing of ozone was carried out through the liquid phase via an external enrichment and a supply system transverse to the flow direction. The influence of irradiation power and ozone dose on the degradation rate for photocatalytic ozonation was investigated. In addition, the performance of the individual processes photocatalysis and ozonation were studied. The degradation kinetics of the parent compounds were determined using liquid chromatography tandem mass spectrometry. First-order kinetics were determined for photocatalysis and photocatalytic ozonation. A maximum reaction rate of the reactor was determined, which could be achieved by both photocatalysis and photocatalytic ozonation. At a dosage of 0.4 mg /mg DOC, the maximum reaction rate could be achieved using 75% of the irradiation power used for sole photocatalysis, allowing increases in the energetic efficiency of photocatalytic wastewater treatment processes. The process of photocatalytic ozonation is suitable to remove a wide spectrum of micro-pollutants from wastewater.show moreshow less

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Metadaten
Document Type:Article
Author: Simon MehlingORCiD, Tobias SchnabelORCiDGND, Prof. Dr.-Ing. Jörg LondongORCiDGND
DOI (Cite-Link):https://doi.org/10.2166/wst.2021.617Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20220209-45865Cite-Link
URL:https://iwaponline.com/wst/article/85/1/535/85800/Photocatalytic-ozonation-in-an-immersion-rotary
Parent Title (English):Water Science & Technology
Publisher:IWA Publishing
Place of publication:London
Language:English
Date of Publication (online):2022/02/08
Date of first Publication:2021/12/10
Release Date:2022/02/09
Publishing Institution:Bauhaus-Universität Weimar
Institutes and partner institutions:Fakultät Bauingenieurwesen / Professur Siedlungswasserwirtschaft
Volume:2022
Issue:volume 85, issue 1
Pagenumber:14
First Page:535
Last Page:548
Tag:anthropogenic micro-pollutants; photocatalysis; photocatalytic ozonation; titan dioxide; wastewater treatment
GND Keyword:Abwasserreinigung; Fotokatalyse; Mikroverunreinigungen
Dewey Decimal Classification:600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften / 628 Sanitär- und Kommunaltechnik; Umwelttechnik
BKL-Classification:56 Bauwesen / 56.35 Siedlungswasserwirtschaft, industrielle Wasserwirtschaft
58 Chemische Technik, Umwelttechnik, verschiedene Techno- / 58.51 Abwassertechnik, Wasseraufbereitung
Licence (German):License Logo Creative Commons 4.0 - Namensnennung (CC BY 4.0)