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CirTec Waste water treatment

Our story

Founded in 2010 with a clear purpose — to recover value from wastewater and enable a circular society — CirTec has always believed that water and resources deserve more than single use. Since joining Nijhuis Saur Industries, we have strengthened this purpose as part of #MissionWater: advocating for water, closing loops, and ensuring water receives the value it deserves.

We operate with a long-term mindset, supporting customers from initial idea and piloting through full-scale realization, commissioning and operational support. Whether we work directly with end-users or alongside engineering partners, we stay close to our clients to understand their challenges and design solutions that truly make an impact.

Today, CirTec is a trusted global technology center within NSI, recognized for game-changing innovations in circular water treatment and resource recovery.

"The transition to a circular and sustainable society is not a goal but an absolute must. "
Coos Wessels

Our industry applications

We support a broad range of industries and utilities, designing and implementing systems for:
• Municipal & industrial wastewater treatment
• Drinking and process water treatment
• Biosolids and sludge processing
• Odor, gas and emissions treatment
• Resource recovery (water, nutrients, cellulose, fibers, energy)

Our solutions help modernize existing installations, relieve capacity pressure, improve performance, and support circularity and compliance targets.

Our solutions

CirTec combines engineering, equipment supply, piloting, commissioning and long-term service to deliver reliable, scalable and circular water solutions. From stand-alone units to full EPC execution, we support clients throughout the entire lifecycle of their installation.

Mechanical and biological treatment solutions

Design and implementation of treatment steps that remove solids, organics and nutrients using efficient mechanical and biological processes.

Circular expertise: Resource recovery

Resource recovery is at the heart of CirTec’s mission. We develop technologies that extract valuable materials directly from wastewater and sewer networks, including:
• Reusable water
• Nutrients (nitrogen- and phosphorus-rich streams)
• Cellulose fibers (from toilet paper)
• Low-grade energy and heat

These recovered resources can be reused in bioplastics, biocomposites, biogas enhancement, agricultural applications, district heating, dewatering processes and other high-value industrial uses.

By reducing load on centralized treatment plants, improving system efficiency and recovering valuable materials, we help cities and industries move toward a circular, low-emission and resource-efficient future.

Reference examples

  • Industrial
  • Fish processing
Beetgumermolen, The Netherlands

Searious Fish Leather Tanning Project

Project’s context & challenges

Searious BV, based in Beetgumermolen, Netherlands, developed a sustainable tanning process to convert fish skin into exotic leather without using harmful substances like chromium, brine, or fungicides. To close the loop in this innovative process, CirTec from Purmerend provided a key water treatment component. The challenge was to treat a liquid stream with high water content and transform it into a reusable, resource-rich concentrate using low-grade energy. This collaboration supports Europe’s circularity goals by turning a by-product of fish processing into a high-value product without generating waste. The collaboration agreement signed at Aqua Nederland trade show.

More about this reference

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CirTec

CirTec B.V.

Nijverheidsweg 26
1442 LD
Purmerend
The Netherlands

+31 (0) 299 79 20 80
info@cirtec.nl