25 May 2018

The sustainable Nereda® technology from Royal HaskoningDHV will treat the wastewater from the Dutch village Vriezenveen from 2020 onwards. Compared to the current installation, the new treatment takes up much less space. Water Authority Vechtstromen is an innovative organisation that attaches great importance to the recovery of energy and raw materials from wastewater. With the new installation, the water authority can extract more raw materials from the sewage water of about 15,000 people against lower operational and energy costs.

After good experiences with the hybrid Nereda plant in Vroomshoop, Royal HaskoningDHV is building the second Nereda treatment plant for the Vechtstromen water authority. This time it is 100% Nereda technology. The current purification from the 1970s will be replaced by a sustainable, modern installation that can easily be adjusted online via the Aquasuite® Nereda Controller. The treatment will be operational from mid-2020.

The basic operation of the current and the new Nereda installation is largely the same. The dirty sewage water is broken down and cleaned by billions of bacteria. They then do their work in the various large settling tanks. With the new Nereda installation, fewer and considerably smaller tanks are needed, because the aerobic bacteria form compact aerobic granule biomass, in which several treatment steps are completed simultaneously. This simplifies and accelerates the treatment process. The new installation occupies less than half of the current site.