Biological waste water purification

Posted on 13 May 2014


The challenge for many cities and industries around the world is to find cost-effective, sustainable and simple solutions for sanitation that have a small footprint and meet the most stringent purification requirements.

Nereda offers that solution. The success of Nereda is its high water treatment capability in combination with significantly lower investment and operational costs, a very small physical footprint (up to a factor 4 smaller) and high energy savings (20-30%).

Nereda treats wastewater with the unique features of so-called aerobic granular biomass: purifying bacteria that create compact granules with superb settling properties. The technology was invented by the Delft University of Technology, in the Netherlands, and developed in a unique public private-partnership between the University, the Dutch Foundation for Applied Water Research (STOWA), the Dutch Water Boards and Royal HaskoningDHV. After 20 years of research and development this innovative biological solution is now proving itself to be a leap forward in wastewater treatment technology.



Cost-effective, both in capital expenditure and operational costs
Plant footprint up to a factor 4 smaller
Significantly lower energy consumption (20-30%)
No/minimal waste generating chemicals
Capable of delivering excellent effluent quality, removing N and P in one single process.
Compact: no separate clarifiers and aerobic/anoxic/anaerobic compartments
No odour
Easy to operate, with little mechanical/electrical equipment
Fitting designs for municipalities, industries and combined municipal-industrial plants
Attractive solution for greenfield installations and for retrofitting or extending conventional activated sludge plants
Proven hybrid applications as extensions to existing conventional plants


Project location

Project partners

  • Aqua-Terra Nova B.V.
  • Royal HaskoningDHV
  • TU Delft