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:

  1. Filling of wastewater at the reactor bottom and simultaneously displace water purified in the previous cycles at the reactor top
  2. Aeration, resulting in extensive simultaneous biological removal of organic, nitrogen and phosphorus components
  3. Fast settling, to separate biomass from the purified effluent after which the Nereda plant is ready for a new cycle.