How it works
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.
