Axel Steffens

M.Sc.

Research Assistant
Institute for Sanitary Engineering, Water Quality and Solid Waste Management
Multiscale Environmental Process Engineering

Contact


Bandtäle 2
70569 Stuttgart
Germany

Subject

  • Photocatalytic water treatment using titanium dioxide
  • Adsorption and removal of micropollutants using powdered activated carbon
  • Expertise activities in the field of wastewater and recyclingwater treatment in the vehicle wash sector
  • Fluidized bed bioreactors
  • Flotation of wastewater from laundry and textile industries
  • Suspended microplastics

  1. 2021

    1. Schoenell, E. K.; Otto, N.; Rodrigues, M. A. S. and Metzger, J. W. (2021). Removal of Organic Micropollutants from Treated Municipal Wastewater by O3/UV/H2O2 in a UVA-LED Reactor. Ozone: Science & Engineering, 1--10. https://doi.org/10.1080/01919512.2021.1900716

  2. 2019

    1. Otto, N. (2019). Druckentspannungsflotation zur Abscheidung von Mikrofasern aus Wäschereiabwasser. Presented at the 40. Assistententreffen der deutschsprachigen siedlungswasserwirtschaftlichen Institute, Wien/Österreich.
    2. Otto, N.; Duarte, J. P.; Marenda, T. and Menzel, U. (2019). Entfernung von Formaldehyd aus wässrigen Lösungen mittels Photolyse von Wasserstoffperoxid im LED-Paneel-Reaktor. Presented at the Industrietage Wassertechnik 2019, Frankfurt/M, Germany. Retrieved from https://dechema.de/wassertechnik2019.html
    3. Otto, N.; Dufner, L.; Neuffer, D.; do Amaral, K. J.; Silva Selvam, T. S. and Menzel, U. (2019). Conception and evaluation of a small solar self-sufficient wastewater treatment plant in the tropical climate. In Book of Abstracts of the 9th German-Brazilian Symposium. University of Hohenheim, Stuttgart.
    4. Otto, N.; Kerber Schoenell, E.; Rodrigues, M. A. S. and Metzger, J. W. (2019). Effect of ozonation and photo-oxidation of organic micropollutants in municipal sewage. In Proceedings of the 11th IWA Micropol & Ecohazard Conference 2019 (pp. 354–356). Seoul/SK: International Water Association. Retrieved from http://www.micropol2019.org/
    5. Otto, N.; Marenda, T.; Metzger, J. and Menzel, U. (2019). Spectrometric detection and photo-oxidative removal of formaldehyde in aqueous solutions. In Proceedings of the 11th IWA Micropol & Ecohazard Conference 2019 (pp. 718–719). Seoul/SK: International Water Association. Retrieved from http://www.micropol2019.org/

  3. 29.10.2018

    1. Otto, N. (n.d.). Photo-oxidative processes for water and wastewater treatment: Vortrag beim 10° Programa Internacional Brasil-Alemanha de Mestrado Profissional em Meio Ambiente Urbano e Industrial. Stuttgart.

  4. 2018

    1. Otto, N. (2018). Großflächiger Photoneneintrag durch Lichtein- und -auskopplung für die photokatalytische und photo-oxidative Wasserreinigung: Beleuchtete Oberflächen durch Lichteinkopplung für Photo-AOP-Verfahren: Präsentation und Beitrag im Tagungsband. In 39. Assistententreffen der deutschsprachigen siedlungswasserwirtschaftlichen Institute (p. 39).
    2. Otto, N.; Stehle, S.; Brockhaus, T.; Hangi, A.; Vogel, A. and Menzel, U. (2018). Stacked UV-LED panels with photocatalytic coatings for removal of dye and persistent organic pollutants: P12: Poster + Beitrag im Tagungsband. In Industrial Water 2018: Book of Abstracts (p. 226). Retrieved from /brokenurl#www.industrial-water.org
    3. Otto, N. M. (2018). Coated Light Panels increasing Modularity and Surface-To-Volume Ratio of Immobilized Photocatalysts for Water Treatment. In S. Malato; J. A. Sánchez Pérez; I. Oller; A. Agüera; I. Polo; and O. Malato (Eds.), Proceedings of the 10th European meeting on Solar Chemistry and Photocatalysis: Environmental Applications (SPEA10) (pp. 305--306).
    4. Vogel, A.; Otto, N.; Vu, T. P.; Gadow, R. and Menzel, U. (2018). Eigenschaften keramischer und polymerbasierter Membranfiltermaterialien. (P. GmbH, Ed.). Presented at the XIX. Workshop “Charakterisierung von feinteiligen und porösen Festkörpern,” Niedernhausen.
    5. Vu, P.; Otto, N.; Vogel, A.; Kern, F.; Killinger, A. and Gadow, R. (2018). Efficiently quantifying the anatase content and investigating its effect on the photocatalytic activity of titania coatings by suspension plasma spraying. Surface and Coatings Technology. https://doi.org/10.1016/j.surfcoat.2018.07.064

  5. 10.07.2018

    1. Otto, N. (n.d.). Evaluation of Coating Parameters and Photocatalytic Performance of Immobilized TiO2 Using Thermokinetic, Wet Chemical and Vacuum Deposition Processes: 3rd International Conference on New Photocatalytic Materials for Environment, Energy and Sustainability (NPM-3) and 4th International Conference on Photocatalytic and Advanced Oxidation Technologies for the Treatment of Water, Air, Soil and Surfaces (PAOT-4),. Presented at the 3rd International Conference on New Photocatalytic Materials for Environment, Energy and Sustainability (NPM-3) and 4th International Conference on Photocatalytic and Advanced Oxidation Technologies for the Treatment of Water, Air, Soil and Surfaces (PAOT-4), 10-13 July 2018.

  6. 21.09.2017

    1. Otto, N. (n.d.). Photocatalytic Water Treatment: Vortrag im Rahmen der Delegationsreise zum Thema \glqqWasserforschung in Kanada\grqq von Baden-Württemberg International und dem Wassernetzwerk BW (17.-22.09.2017). Montréal/Québec, Canada.

  7. 2017

    1. Otto, N.; Els, J.; Hojenski, R.; Vu, P.; Vogel, A. and Menzel, U. (2017). Immobilized photocatalysts - innovative enough for sustainable water treatment? P88: poster presentation. In International Water Association (Ed.), IWA 4th Water Research Conference -- The Role of Water Technology Innovation in the Blue Economy.
    2. Vu, T. P.; Otto, N.; Vogel, A.; Kern, F.; Killinger, A. and Gadow, R. (2017). Photocatalytically active Titania Coatings for Water Treatment. In Jahrbuch Oberflächentechnik 2017 (Vol. 73, pp. 146--153). Eugen G. Leuze Verlag.
    3. Vu, T. P.; Otto, N.; Vogel, A.; Kern, F.; Killinger, A. and Gadow, R. (2017). Investigating influences of suspension plasma spray parameters on photocatalytic activity of TiO2 coatings. In ITSC 2017 (Vol. 336, pp. 1132--1136). Düsseldorf: DVS Media GmbH.
    4. Vu, T. P.; Otto, N.; Vogel, A.; Kern, F.; Killinger, A. and Gadow, R. (2017). Solid evidences proving the role of anatase content in TiO2 photocatalytic coatings by suspension plasma spraying: platform presentation and conference paper. In 8th Les Rencontres Internationales sur la Projection Thermique.

  8. 02.-07.10.2017

    1. Otto, N. (n.d.). Potential of photocatalysis as sustainable technology for water treatment. 8. Deutsch-Brasilianisches Symposium Nachhaltige Entwicklung. Porto Alegre/Brasilien.

  9. 2016

    1. Otto, N.; Platz, S.; Fink, T.; Wutscherk, M. and Menzel, U. (2016). Removal of micropollutants with coarse-ground activated carbon for enhanced separation with hydrocyclone classifiers. Water Science and Technology : A Journal of the International Association on Water Pollution Research, 73(11), 2739--2746. https://doi.org/10.2166/wst.2016.128
    2. Otto, N.; Kirchner, E.; Platz, S.; Vu, T. P.; Vogel, A. and Menzel, U. (2016). Activated carbono adsorption versus photocatalysis - comparison of two treatment technologies: Platform presentation. In 5th International Conference on Emerging Contaminants (EmCon2016) and Micropollutants (WiOW2016) in the Environment.
    3. Vu, T. P.; Otto, N.; Vogel, A.; Kern, F.; Killinger, A. and Gadow, R. (2016). Investigating influences of suspension plasma spray parameters on photocatalytic activity of TiO2 films: Platform presentation and conference proceedings. In 15th European Inter-Regional Conference on Ceramics.

  10. 07.-10.06.2016

    1. Otto, N.; Kirchner, E.; Vu, T. P.; Vogel, A.; Platz, S.; Gadow, R. and Menzel, U. (n.d.). Empirial studies of WO3-doped TiO2 catalysts for water treatment purposes: Poster presentation. First International Conference on New Photocatalytic Materials for Environment, Energy and Sustainability (NPM-1). Göttingen/Germany.

  11. 2015

    1. Otto, N.; Platz, S.; Fink, T. and Menzel, U. (2015). Application of Coarse-Grained Powdered Activated Carbon for Improved Separation w3ith Hydrocyclone Classifiers after Elimination of Organic Micropollutants from Wastewater: Conference paper and platform presentation. In International Water Association (Ed.), Conference Proceedings of the IWA 7th Eastern European Young Water Professionals Conference (pp. 565--572).
    2. Otto, N.; Platz, S.; Fink, T. and Menzel, U. (2015). Verwendung grobkörniger Pulveraktivkohle zur Steigerung der Abtrennleistung mit Hydrozyklonen: Betriebserfahrungen und Auswirkung auf die Spurenstoffe: Vortrag und Beitrag im Tagungsband. In M. Wessling and J. Pinnekamp (Eds.), Verfahren der Wasseraufbereitung und Abwasserbehandlung (pp. 57--64). Aachen.
    3. Otto, N.; Platz, S.; Fink, T.; Wutscherk, M. and Menzel, U. (2015). Removal of micropollutants with coarse-ground activated carbon for enhanced separation with hydrocyclone classifiers: Conference paper and platform presentation in Session 4 (MPOL-058). In International Water Association (Ed.), Micropol &~Ecohazard.
    4. Vu, T. P.; Otto, N.; Kern, F.; Vogel, A.; Killinger, A. and Rainer, G. (2015). Investigating influences of suspension properties on photocatalytic activity of TiO2 films coated by suspension plasma spray (SPS). In 20th International Conference on Semiconductor Photocatalysis & Solar Energy Conversion.

  12. 20.06.2015

    1. Otto, N. and Kamdideh, S. (n.d.). Flotationsabscheidung: Postervortrag und Modellvorführung. Tag Der Wissenschaft an Der Universität Stuttgart. Stuttgart.

  13. 03.11.2015

    1. Otto, N. (n.d.). Entfernung von Spurenstoffen aus Abwasser mittels grobgemahlener Pulveraktivkohle und anschließender Abtrennung im Multi-Hydrozyklonabscheider: Vortrag beim 7° Programa Internacional Brasil-Alemanha de Mestrado Profissional em Meio Ambiente Urbano e Industrial. Stuttgart.

  14. 2014

    1. Menzel, U.; Otto, N.; Platz, S. and Wutscherk, M. (2014). Abscheidung von Pulveraktivkohle mittels Hydrozyklonen zur Elimination von Spurenstoffen und organischen Reststoffen aus kommunalen und industriellen Abwässern. Ingenieurspiegel, (4), 79--80.

  15. Mai 2013

    1. Otto, N. (n.d.). Entwicklung und Untersuchung einer funktionsfähigen und kostengünstigen biologischen Reinigungsstufe als Wasseraufbereitungsanlage für mineralölhaltige Abwässer aus Fahrzeugwaschanlagen (Diplomarbeit). Institut für Siedlungswasserbau, Wassergüte- und Abfallwirtschaft, Stuttgart.
  • Turbidity-independent photocatalytic reactors using the principle of active light incoupling
  • Photocatalytically active coatings for energy efficient water treatment in model-based reactors
  • Efficient and economic segregation of powdered activated carbon using hydrocyclones after removal of micropollutants and organic residues from municipal and industrial wastewater
  • Environmentally friendly removal of specific microparticles and fibres from the wastewater of textile laundries by means of high-performance flotation
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