Veolia Water Technologies & Solutions

zeeDENSE*: Super-Intensification of Activated Sludge

Veolia’s zeeDENSE is a state-of-the-art application coupling ZeeLung MABR & inDENSE continuous flow densification technology for super-intensification of activated sludge plants.

Overview & Benefits

ZeeLung Overview

ZeeLung MABR is a next-generation biofilm process that employs a gas permeable media to deliver oxygen to a biofilm that is attached to the surface of the media.

ZeeLung maximizes treatment capacity in existing tank volumes while also reducing energy consumption.

During secondary treatment, bacteria metabolize nutrients and organics - and need a flow of oxygen to get it done. Oxygen is typically pumped through diffusers to create bubbles. But most of the oxygen rises to the surface without being used and valuable energy is wasted. At Veolia, we saw a new approach. While conventional solutions require the construction of new tanks, ZeeLung increases treatment capacity in existing assets and reduces energy use. ZeeLung enables process intensification and process resilience. The result is expanded treatment capacity stabilized cold-temperature performance and rapid response to load changes.

ZeeLung solves the following treatment challenges:

  • Increase treatment capacity
  • Augment ammonia removal•Implement nitrogen removal
  • Enable biological phosphorous removal

ZeeLung Benefits

  • Process Intensification: Up to 50% more treatment capacity and/or performance in existing tank volumes
  • Process Resilience: The attached growth biofilm is resilient to load variations and upset conditions
  • Simple Solution: ZeeLung cassettes are installed into existing bioreactor tanks, avoiding the need to build new tanks and allowing fast implementation
  • Energy Reduction & GHG Mitigation: 4X reduction in aeration energy & N2O mitigation potential

How It Works

Case Studies

ZeeLung Technology