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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.

Key figures

26%

Of Europe’s phosphate requirement can be covered by phosphate recovered from sewage

2 tonnes CO₂

Saved for every tonne of industrial fibre applied

10 million trees

Used every year for toilet paper worldwide – Cirtec helps drastically reduce this

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

Our industry applications

We support a broad range of industries and utilities, designing and implementing systems for:

  • Municipal “waste” water treatment

  • Industrial “waste” water treatment

  • Biosolids and sludge processing

  • 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.

Sludge treatment: Belt press & belt thickener

Advanced technologies to separate or thicken solids, increasing efficiency, reducing sludge volume and improving downstream performance.

Beltpress

Beltpress

Belt thickener

Circular expertise & added value services

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

Helping your through all the stages of the project

We provide complete project delivery — including design, engineering, manufacturing, installation and commissioning — ensuring reliable and efficient turnkey treatment systems tailored to customer needs. And with our Pilot Testing, each CirTec system can be tested in pilot form prior to full-scale implementation to ensure suitability and optimal performance under real-world conditions.

Cellcap finescreens at WWTP Beemster

Cellulose recovery key figures

3.3 million tonnes

Cellulose can be recovered annually from sewage in Western Europe

8.25 million tonnes

CO₂ equivalent saved through cellulose recovery

253,000 tonnes

Chlorine saved by using recovered cellulose

1.8 billion m³

Water saved during the production of recovered cellulose

Reference examples

  • Municipal
  • Municipal wastewater
Almere, the Netherlands

Decentralized sewage treatment plant Oosterwold

More about this reference
  • 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

Certifications

At CirTec, certifications are more than formalities — they embody our ongoing commitment to quality, safety, and responsible water management.

Management System Certifications

  • ISO 9001:2015 (Quality Management System)
    Certified by TÜV NORD Nederland, this standard confirms that CirTec’s management system meets international requirements for quality. The scope covers the design, sale, production, and maintenance of machines, as well as the execution of projects in the field of industrial and municipal (waste)water treatment and sludge treatment. The certification is subject to annual evaluation, ensuring continuous improvement and compliance.
  • SCC (VCA*) 2017/6.0 (Safety, Health, and Environment Checklist for Contractors)**
    Also certified by TÜV NORD Nederland, this certificate demonstrates CirTec’s dedication to safety and health in the workplace. It applies to the execution of projects in industrial and municipal water treatment, including wastewater, drinking water, process water, and sludge handling. Annual audits guarantee ongoing adherence to the highest safety standards.

Technical and Regulatory Qualifications

  • NACE Code 39
    CirTec’s certified activities are classified under NACE code 39, relating to environmental management and water treatment services.

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CirTec

General contact

Nijverheidsweg 26
1442 LD
Purmerend
The Netherlands

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

Service contact

service@cirtec.nl