TY  - JOUR
A1  - Mehling, Simon
A1  - Schnabel, Tobias
A1  - Londong, Jörg
T1  - Photocatalytic ozonation in an immersion rotary body reactor for the removal of micro-pollutants from the effluent of wastewater treatment plants
JF  - Water Science & Technology
N2  - 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. 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.
KW  - Abwasserreinigung
KW  - Fotokatalyse
KW  - Mikroverunreinigungen
KW  - anthropogenic micro-pollutants
KW  - photocatalysis
KW  - photocatalytic ozonation
KW  - wastewater treatment
KW  - titan dioxide
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20220209-45865
UR  - https://iwaponline.com/wst/article/85/1/535/85800/Photocatalytic-ozonation-in-an-immersion-rotary
VL  - 2022
IS  - volume 85, issue 1
SP  - 535
EP  - 548
PB  - IWA Publishing
CY  - London
ER  - 
TY  - JOUR
A1  - Aicher, Andreas
A1  - Börmel, Melanie
A1  - Londong, Jörg
A1  - Beier, Silvio
T1  - Vertical green system for gray water treatment: Analysis of the VertiKKA-module in a field test
JF  - Frontiers in Environmental Science
N2  - This work presents a modular Vertical Green System (VGS) for gray water treatment, developed at the Bauhaus-Universität Weimar. The concept was transformed into a field study with four modules built and tested with synthetic gray water. Each module set contains a small and larger module with the same treatment substrate and was fed hourly. A combination of lightweight structural material and biochar of agricultural residues and wood chips was used as the treatment substrate. In this article, we present the first 18 weeks of operation. Regarding the treatment efficiency, the parameters chemical oxygen demand (COD), total phosphorous (TP), ortho-phosphate (ortho-P), total bound nitrogen (TNb), ammonium nitrogen (NH4-N), and nitrate nitrogen (NO3-N) were analyzed and are presented in this work. The results of the modules with agricultural residues are promising. Up to 92% COD reduction is stated in the data. The phosphate and nitrogen fractions are reduced significantly in these modules. By contrast, the modules with wood chips reduce only 67% of the incoming COD and respectively less regarding phosphates and the nitrogen fraction.
KW  - Grauwasser
KW  - Abwassertechnologie
KW  - vertical green system
KW  - grey water treatment
KW  - urban heat island effect
KW  - OA-Publikationsfonds2022
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20230124-48840
UR  - https://www.frontiersin.org/articles/10.3389/fenvs.2022.976005/full
VL  - 2022
IS  - Volume 10 (2022), article 976005
SP  - 1
EP  - 7
PB  - Frontiers Media
CY  - Lausanne
ER  -