Nereda® aerobic wastewater treatment technology - how it works
Nereda technology that purifies wastewater using the unique features of aerobic granular sludge.

How Nereda® Biological wastewater treatment works
Nereda® is biological wastewater treatment. Within a Nereda® reactor, throughout a simple three-step cycle, the purifying biomass in Nereda® grows naturally as compact aerobic granular sludge, with superb settling properties. An important feature of the granules is that aerobic and anoxic/anaerobic zones co-exist. This enables a large variety of biological processes to happen simultaneously, like nitrification, denitrification and biological phosphate removal.

The alternating cycle steps are:
- Filling of wastewater at the reactor bottom and simultaneously displace water purified in the previous cycles at the reactor top
- Aeration, resulting in extensive simultaneous biological removal of organic, nitrogen and phosphorus components
- Fast settling, to separate biomass from the purified effluent after which the Nereda® plant is ready for a new cycle.
In the below video, we'll take a closer look at how the Nereda technology works, how it was created, and how it's helping the wastewater industry meet today’s challenges.