NH4+ ad-/desorption in sequencing batch reactors: simulation, laboratory and full-scale studies

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • P. Schwitalla
  • Artur Mennerich
  • Ute Austermann-Haun
  • Anneliese Müller
  • Christiane Gruber-Dorninger
  • Holger Daims
  • Niels C. Holm
  • Sabine G. E. Rönner-Holm

Significant NH 4-N balance deficits were found during the measurement campaigns for the data collection for dynamic simulation studies at five full-scale sequencing batch reactor (SBR) waste water treatment plants (WWTPs), as well as during subsequent calibrations at the investigated plants. Subsequent lab scale investigations showed high evidence for dynamic, cycle- specific NH + 4 adVdesorption to the activated flocs as one reason for this balance deficit. This specific dynamic was investigated at five full-scale SBR plants for the search of the general causing mechanisms. The general mechanism found was a NH + 4 desorption from the activated flocs at the end of the nitrification phase with subsequent nitrification and a chemical NH + 4 adsorption at the flocs in the course of the filling phases. This NH + 4 adVdesorption corresponds to an antiparallel K + ad/-desorption. One reasonable full-scale application was investigated at three SBR plants, a controlled filling phase at the beginning of the sedimentation phase. The results indicate that this kind of filling event must be specifically hydraulic controlled and optimised in order to prevent too high waste water break through into the clear water phase, which will subsequently be discarded.

OriginalspracheEnglisch
ZeitschriftWater Science and Technology
Jahrgang58
Ausgabenummer2
Seiten (von - bis)345-350
Anzahl der Seiten6
ISSN0273-1223
DOIs
PublikationsstatusErschienen - 01.08.2008

DOI

Zuletzt angesehen

Publikationen

  1. Dynamic Lot Size Optimization with Reinforcement Learning
  2. Simulation based optimization of lot sizes for opposing logistic objectives
  3. An evaluation of BPR methodologies adopting NIMSAD: A systematic framework for understanding and evaluating methodologies
  4. Soft Optimal Computing Methods to Identify Surface Roughness in Manufacturing Using a Monotonic Regressor
  5. From entity to process
  6. The impact of explicit references in computer supported collaborative learning: Evidence from eye movement analyses
  7. Perfectly nested or significantly nested - an important difference for conservation management
  8. A PD regulator to minimize noise effect using a minimal variance method for soft landing control of an electromagnetic valve actuator
  9. Supporting Visual and Verbal Learning Preferences in a Second-Language Multimedia Learning Environment
  10. Digging into the roots
  11. A highly transparent method of assessing the contribution of incentives to meet various technical challenges in distributed energy systems
  12. Nest site selection and the effects of land use in a multi-scale approach on the distribution of a passerine in an island arid environment
  13. The buffering effect of selection, optimization, and compensation strategy use on the relationship between problem solving demands and occupational well-being
  14. Binary Random Nets II
  15. Developing robust field survey protocols in landscape ecology
  16. Res Lunae: Characterizing Diverse Lunar Resource Systems Using the Social-Ecological System Framework
  17. As cast microstructures on the mechanical and corrosion behaviour of ZK40 modified with Gd and Nd additions
  18. Modelling, explaining, enacting and getting feedback: How can the acquisition of core practices in teacher education be optimally fostered?
  19. Implicit processes in moral decision making: Why milliseconds matter
  20. Using photography to elicit grazier values and management practices relating to tree survival and recruitment
  21. An EKF-based observer for sensorless valve control in camless internal combustion engine