NareDeni Large-Scale Technology

Downstream residual denitrification (NAREDENI) offers the possibility of specifically improving nitrogen removal at existing wastewater treatment plants without extensive modifications. As part of the project, the Technical University of Applied Sciences Augsburg is providing scientific support for Germany’s first industrial-scale NDN reactor at the Ingolstadt Central Wastewater Treatment Plant. By analyzing operational data and conducting supplementary laboratory tests, the team is developing operational strategies and investigating the transferability of the process to other wastewater treatment plants.

12/01/2024 - 10/31/2026
An NDN reactor that has not yet been filled, with a view toward the discharge box, agitators, walkway, and feed line, prior to commissioning in the fall of 2024
An NDN reactor that has not yet been filled, with a view toward the discharge box, agitators, walkway, and inlet pipe, prior to commissioning in the fall of 2024

Funding provided by:

  • Bavarian State Office for the Environment – LfU 
  • Bavarian State Ministry for the Environment and Consumer Protection – StMUV

Project partners:

Ingolstadt Central Wastewater Treatment Plant (ZKA), Dr.-Ing. Schreff (Mayr Ingenieure)

Project period:
2024–2026

People involved:
Prof. Dr.-Ing. Rita Hilliges
, Benedict Montau, M.Eng
., Sophia-Marie Enderle, B.Eng.

Contact via:
wasser(at)hs-augsburg.de

Cost-Effective Upgrading of Wastewater Treatment Plants by Improving the Settling Properties of Activated Sludge

The term "aerobic granular sludge" (AGS) refers to compact activated sludge agglomerates that generally enable high settling rates. Thanks to improved settling properties, the biomass concentration in the biological stage can ideally be increased. This may make it possible to increase the plant’s capacity without having to expand the secondary clarifiers.