WWTP Haarlem Waarderpolder to use Nereda and Ephyra technologies

Royal HaskoningDHV’s Nereda® technology offers sustainable water treatment and purification using proprietary aerobic granular sludge technology. This requires less space than traditional biological processes, and therefore requires less concrete and energy to deploy.

Ephyra® is a compact and sustainable technology for sludge digestion and biogas production that can break down more organic substances than conventional installations.

While both Nereda and Ephyra have been deployed in other facilities, Haarlem Waarderpolder will be the first wastewater treatment plant (WWTP) in the Netherlands to apply both technologies in one treatment process.

Bas Knapp, Vice Chairman at Hoogheemraadschap van Rijnland, says, “Our ambition is a circular Rijnland. This means that we want to be 100% circular by 2050. That includes using as little energy as possible. In this way, we’ll make a positive contribution to the environment.”

Simone Boogaard, Director of Water at Hoogheemraadschap van Rijnland, says, “It’s been a pleasure to collaborate with companies on this project, especially because it’s helped us meet objectives around water circularity. The modern techniques we’re using offer an elegant solution that also takes up less physical space.”

About WWTP Haarlem Waarderpolder

The Haarlem Waarderpolder is home to one of the largest purification plants in the Rijnland. Responsible for purifying and transporting wastewater from approximately 224,000 households and companies across Haarlem, Spaarndam, Bloemendaal, Zandvoort, and Aerdenhout, the Rijnland Water Board will be working on expanding and renewing the Haarlem Waarderpolder wastewater treatment plant in the coming years.

The Rijnland Water Board has a programme in place through 2029 to expand and improve water purification. The water board is investing to ensure it can meet new water quality requirements and serve a growing population and business community within the region.

These upgrades will also help the plant remove nutrients and micropollutants from the wastewater through biological processes, and recover valuable resources and energy from the wastewater. This requires state-of-the-art technologies that are compact and efficient, and that’s why the water authority has selected Nereda and Ephyra.