NSI WATER AND WASTEWATER SOLUTIONS LTD

What NSI WATER AND WASTEWATER SOLUTIONS LTD does

NSI Water and Wastewater Solutions Ltd, operating commercially as Nijhuis Saur Industries (NSI), is a wholly-owned subsidiary of France's Saur Group and a global provider of engineered water and wastewater treatment systems for municipal and industrial clients. Headquartered in Doetinchem, the Netherlands, with operations spanning 140+ countries and 2,000+ employees, NSI delivers complete treatment trains — from intake screening and coagulation through membrane filtration, anaerobic/aerobic biological treatment, advanced oxidation, and resource recovery — via eight regional centers and a federation of 14 technology brands (Econvert, PWNT, Flootech, Byosis, CirTec, Unidro, Riventa, Sodai, Natural Systems Utilities, Coldep, Mobile Water Solutions, Aqua-Chem, and others).

The company's core technology stack centers on proprietary ceramic membrane filtration (CeraMac®, 25+ year lifespan), a family of Econvert® anaerobic reactors (UASB, EGSB, IR, DGF) and biogas desulphurization systems (Dsulph, RTF), high-rate dissolved air flotation (FlooDaf®, 50%+ energy reduction), ozone-based micropollutant removal (MicroOxi, OSW via Air Liquide partnership), ammonia stripping (ByoFlex®), cellulose recovery (CellCap), and digital platforms (i-MONITORING, i-DOSE). Recent launches include PFAS Resolve (combining VAL Foam Fractionation with electrochemical oxidation) and Vortex Powered Aeration (VPA) for energy-efficient aeration. Customers include municipal water authorities (PUB Singapore, South West Water, PWN, Severn Trent, Scottish Water, HDSR), and industrial leaders across food & beverage, pulp & paper, pharma, energy, LNG, chemicals, and agriculture (QatarGas, ORLEN, L'Oréal, Metsä Fibre, MHP, Essity, Unilever, Aviko).

NSI monetizes through five streams: (1) turnkey water and wastewater EPC projects delivered as general contractor (multi-year, project-based capex for clients); (2) standalone and bundled equipment supply (membranes, DAF systems, digesters, monitoring); (3) Mobile Water Solutions rental/deployment for temporary or emergency needs (500+ mobile assets); (4) lifecycle services including operations, maintenance, monitoring, retrofits, and spare parts; and (5) anaerobic-specific consultancy and audits. Go-to-market is direct enterprise field sales via regional centers and technology brands, complemented by channel partnerships (Vortech, Air Liquide) and event-driven demand generation (IFAT 2026). Pricing is quote-based and project-specific; revenue is not publicly disclosed. NSI is part of Saur Group, the French water conglomerate, providing parent-company backing and integration with municipal water services.

Name

NSI WATER AND WASTEWATER SOLUTIONS LTD

Legal name

Nijhuis Saur Industries B.V.

Website

https://nijhuissaurindustries.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

NSI Water and Wastewater Solutions (Nijhuis Saur Industries) is a Netherlands-headquartered, Saur Group-owned provider of engineered water and wastewater treatment systems for municipal utilities and industrial clients across 140+ countries, delivered through proprietary ceramic membrane, anaerobic, and advanced oxidation technologies.

Ownership category

akta.pro rank

Product category

Water and Wastewater Treatment Systems

NAICS

Industrial Machinery Manufacturing (33324), Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Sewage Treatment Facilities (22132), Water Supply and Irrigation Systems (221310)

SIC

Water Supply (4941), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Industrial Wastewater & Effluent Treatment Services (BPALAHAD)

akta.pro secondary industries

Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ), Industrial Wastewater Treatment (On-site/Pre-treatment) (EUANADAB), Monitoring & Control (Dosing Systems, Remote Monitoring, Sensors) (BPABAJAK), Industrial Wastewater Pretreatment & Treatment Services (BPALAMAC), Industrial Water Reuse Utilities (ZLD/MLD & Process Water Recycling) (EUANAGAG)

Keywords

• Water treatment systems
• Wastewater treatment solutions
• Ceramic membrane filtration
• Anaerobic digestion technology
• Biogas desulphurization solutions

Headquarters

HQ city

Truro

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Turnkey Water Treatment Projects: NSI acts as general contractor delivering complete technology packages including design, civil/electrical works, equipment manufacturing, installation, commissioning, and training. Revenue is recognized on a per-project basis as a capital expenditure for clients.
2. Equipment Supply and Manufacturing: Supply of proprietary treatment equipment including membranes, digesters, DAF systems, biogas desulphurization units, and monitoring systems as standalone or bundled capital sales.
3. Mobile Water Solutions: Rental and deployment of mobile water treatment systems for emergencies, planned maintenance, commissioning, or multi-year temporary water supply needs.
4. Lifecycle Services and Operational Support: Ongoing operational support, monitoring, maintenance, spare parts, upgrades, retrofits, and consultancy services for installed treatment plants to optimize performance and extend asset life.
5. Anaerobic Services: Expert services including audits, consultancy, inspections, troubleshooting, analysis, pilots, maintenance, retrofits, biomass and nutrient supply for anaerobic wastewater treatment plants and biogas systems.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels8 records

Core offering

NSI (Nijhuis Saur Industries) designs, engineers, manufactures and delivers turnkey water and wastewater treatment systems for industrial clients (food & beverage, pharma, pulp & paper, energy, mining) and municipal utilities (drinking water and wastewater authorities). Its offering is built on proprietary technology brands covering ceramic membrane filtration, anaerobic and aerobic biological treatment, dissolved air flotation, ozone oxidation, biogas desulphurization, ammonia stripping, cellulose recovery and digital monitoring, supplied as capital projects, mobile units or lifecycle service contracts.

Product overview

NSI (Nijhuis Saur Industries) provides a comprehensive portfolio of water and wastewater treatment solutions as part of the Saur Group. The company operates as a platform with multiple technology brands and modular solutions including: CeraMac® ceramic membrane filtration systems, ILCA® coagulation/adsorption pretreatment, Econvert® anaerobic wastewater treatment technologies (UASB, EGSB, DGF, D-sulph, RTF), FlooDaf® dissolved air flotation, ByoFlex® and ByoPast® biogas/biomass processing systems, CellCap® cellulose recovery, and advanced oxidation technologies including MicroOxi ozone systems, Ozone Strong Water (OSW), and PFAS Resolve for PFAS destruction. The offering also includes Mobile Water Solutions for temporary treatment needs, Digital Solutions/i-MONITORING for process optimization, and specialized solutions for resource recovery, sludge treatment, and water reuse. Technologies are delivered through regional centers and global technology companies including PWNT, Econvert, Flootech, Byosis, Unidro, Riventa, CirTec, and others. Solutions target industrial sectors (food & beverage, pharma, pulp & paper, energy, mining), municipal drinking water and wastewater, building facilities, and waste-to-energy applications.

Differentiator

Problem solved

Functional benefit

Brands

• MissionWater: Company sustainability initiative focused on giving water the value it deserves and making it more resilient.
• Micro Resolve
• PFAS Resolve

Products and services

• CeraMac Ceramic Membrane Filtration Ceramic membrane filtration system delivering high-flux, energy-efficient microfiltration with low fouling, automated cleaning and a lifespan exceeding 25 years; used by municipal drinking water utilities (e.g., PWN, PUB, South West Water, Scottish Water, South Staffordshire Water, Severn Trent) for pathogen, Cryptosporidium, colour and DOC removal.
• ILCA (In-Line Coagulation and Adsorption) Compact in-line coagulation and adsorption process that creates small pin flocs ideal for direct removal by advanced membrane systems, reducing coagulant usage by more than 50% compared to conventional coagulation; deployed ahead of CeraMac systems at sites including Mayflower WTW, Witches Oak, Bonnycraig and South Staffordshire Water's Hampton Loade.
• Econvert-UASB Anaerobic Reactor Upflow Anaerobic Sludge Blanket reactor providing robust and reliable high-efficiency anaerobic wastewater treatment for industrial clients such as Essity (pulp & paper), where it has been operating since 2013.
• Econvert-EGSB Anaerobic Reactor Expanded Granular Sludge Bed reactor with high-efficiency internals, delivering high-rate anaerobic wastewater treatment in a compact footprint for industrial clients including Aviko Rixona (potato processing).
• Econvert-DGF (Dissolved Gas Flotation) Anaerobic System Anaerobic digester treating raw wastewater with high concentrations of total suspended solids and fats, oils and grease, achieving more than 95% COD removal; deployed at ORLEN Południe biofuel plant and other industrial sites.
• Econvert-Dsulph Biogas Desulphurization High-efficiency biogas desulphurization system that chemically absorbs hydrogen sulfide in a scrubber and biologically recovers elemental sulfur in a bioreactor while regenerating alkalinity, achieving >99% H2S removal; deployed alongside anaerobic reactors at Aviko Rixona and Turkish recycled board mill projects.
• Econvert-RTF Regenerative Trickling Filter Regenerative trickling filter for biogas desulphurization achieving 99%+ H2S removal without caustic soda consumption, with automated filter bed cleaning to prevent clogging, suited to biogas-to-energy applications.
• FlooDaf Dissolved Air Flotation High-capacity, compact dissolved air flotation system with rectangular 1m low-water-depth design, handling flows from 2.5 to 3,000 m3/h per unit and delivering over 50% reduced energy consumption vs typical DAF; supplied by Flootech for industrial and municipal pre-treatment.
• High Rate i-DAF High Rate dissolved air flotation modules for compact pre-treatment of large water flows, designed for municipal desalination and industrial applications; deployed at PUB Singapore's Marina East Desalination Plant (308,000 m3/day capacity).
• ByoFlex Ammonia Stripper Ammonia stripping system for digestate treatment that prevents NH4/NH3 inhibition in anaerobic digestion, achieves >75% nitrogen removal without alkaline dosing, and enables recycled water reuse for feedstock dilution in waste-to-energy and biogas plants such as Oril-Leader (Ukraine).
• ByoPast Pasteurization System Pasteurization system for waste-to-energy plants delivering reliable digestate pasteurization with heat recovery, enabling safe downstream transport and use of digestate.
• CellCap Cellulose Recovery Technology from CirTec that extracts a high-quality cellulose stream from incoming sewage for reuse as a valuable raw material in circular-economy applications, including in decentralized sewage plants such as Oosterwold (Almere).
• MicroOxi Ozone Oxidation System Ozone oxidation technology for advanced micropollutant removal, breaking down pharmaceutical residues and other trace organic contaminants in municipal wastewater effluent; deployed at Houten WWTP (HDSR) and WWTP Winterswijk.
• Ozone Strong Water (OSW) Technology Advanced ozone mixing system jointly commercialized with Air Liquide for efficient micropollutant elimination, separating mass transfer, mixing and reaction into distinct process steps to achieve 95%+ ozone transfer and 20% lower total CAPEX than conventional ozonation; positioned as a key building block of the Micro Resolve platform for EU Urban Wastewater Treatment Directive compliance.
• PFAS Resolve Modular PFAS treatment concept that combines Coldep VAL Foam Fractionation (VFF) for mid- and long-chain PFAS concentration with Axine electraCLEAR electrochemical oxidation for on-site destruction across long, short and ultra-short-chain PFAS compounds, avoiding secondary solid or liquid waste streams and supporting site-specific PFAS challenges.
• Vortex Powered Aeration (VPA) Advanced aeration technology from Vortech Water Solutions distributed by NSI across Europe that uses cyclonic flow to bring water to air, improving aeration and mixing performance and delivering up to 30% energy savings versus conventional aeration systems; targeted at industrial Dairy and Pulp & Paper wastewater treatment customers.
• Mobile Water Solutions Rental and deployment of mobile water and wastewater treatment units for emergencies, planned maintenance, commissioning, refurbishment or multi-year temporary water supply needs, providing an agile entry point for new client relationships globally.
• Lifecycle Services and Operational Support Ongoing operational support, monitoring, maintenance, spare parts, upgrades, retrofits and consultancy services for installed water and wastewater treatment plants, including audits, inspections, pilots, troubleshooting, biomass/nutrient supply and analysis for anaerobic wastewater and biogas systems; designed to optimize performance and extend asset life.
• Micro Resolve Micropollutant Removal Platform Micropollutant removal solutions platform integrating ozone oxidation and other advanced technologies (including OSW) to address stringent discharge and reuse standards for pharmaceutical residues and trace organic contaminants, supporting compliance with the EU Urban Wastewater Treatment Directive's 80% micropollutant removal requirement.

Quantifiable outcome

• ORLEN Południe WWTP generates 0.7 MW biogas for internal heat consumption
• +11 more outcomes

Named customers30 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature17 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Air LiquidecoreTechnology or Integration · 11 May 2026NSI and Air Liquide signed an agreement to jointly commercialize Ozone Strong Water (OSW) technology for micropollutant removal in Benelux and the UK. Air Liquide retains patent ownership while NSI serves as production and system integration partner. OSW is positioned as a key building block of NSI's Micro Resolve micropollutant removal solutions platform, supporting compliance with EU Urban Wastewater Treatment Directive requirements for 80% micropollutant removal.
• Vortech Water SolutionscoreChannel Partner/ Reseller/ Distributor · 6 May 2026European-wide distribution agreement where NSI makes Vortech's Vortex Powered Aeration (VPA) technology available to industrial Dairy and Pulp & Paper wastewater treatment customers across Europe. NSI leads commercial introduction and leverages its extensive wastewater treatment process knowledge and project delivery experience. VPA has demonstrated up to 30% energy savings in retrofit applications. Vortech was recognized as a winner of the UpLink Water Resilience Challenge by WEF and HCL Group.
• Coldep (part of NSI)coreTechnology or Integration · 29 April 2026Coldep's VAL Foam Fractionation (VFF) technology is integrated into NSI's PFAS Resolve solution. VFF selectively concentrates mid- and long-chain PFAS using vacuum foam fractionation, achieving orders-of-magnitude volume reduction with lower air demand and footprint than conventional systems. This enables practical and cost-effective downstream PFAS destruction.
• Axine Water TechnologiescoreTechnology or Integration · 29 April 2026Axine's electraCLEAR platform powers the electrochemical oxidation (EOx) component of NSI's PFAS Resolve solution. EOx destroys PFAS at the molecular level under ambient conditions without generating secondary solid or liquid waste streams, effectively treating long-, short-, and ultra-short-chain PFAS compounds. Backed by commercial operation since 2017 and experience across hundreds of waste streams.
• Pannekoek GWWminorImplementation/ SI/ Consulting PartnerPartner in the Construction Team tender model for the Houten WWTP full-scale ozone installation project in the Netherlands. Collaborative tendering approach for complex water treatment technology deployment.
• MoekotteminorImplementation/ SI/ Consulting PartnerPartner in the Construction Team tender model for the Houten WWTP full-scale ozone installation project in the Netherlands.
• Witteveen+BosminorImplementation/ SI/ Consulting PartnerPartner in the design and delivery of the full-scale ozone installation for Houten WWTP. Contributed to engineering and design collaboration within the Construction Team tender model.
• CLC Water PartnershipminorImplementation/ SI/ Consulting PartnerNSI contributed to engineering of the advanced treatment process at WWTP Winterswijk as part of the CLC Water partnership. NSI supplied MicroOxi ozone technology and chemical coagulation system.
• Royal Oosterhof HolmanminorImplementation/ SI/ Consulting PartnerMain contractor in consortium for the Oosterwold decentralized sewage treatment plant project in Almere, Netherlands. Worked with CirTec (CellCap technology) and other partners.
• Vitens (Regional Drinking Water Company)minorStrategic or Co-development PartnerRegional drinking water company collaborating with NSI on the Heuvelstraat water-neutral residential project in Silvolde, Netherlands. Contributed drinking water innovation and stakeholder coordination.

Scale indicators13 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Kurita Water Industries: Japanese water treatment specialist providing industrial water treatment chemicals, equipment, and ultra-pure/process water systems. Closely comparable to NSI's industrial segment, particularly in pulp & paper, electronics, and chemicals, with strong APAC presence complementing NSI's Europe-centric footprint.
• Veolia Water Technologies: The water-technology arm of Veolia Environnement (which absorbed SUEZ), offering municipal and industrial water/wastewater treatment plants, mobile solutions, and chemicals. Directly comparable to NSI across municipal drinking water, industrial wastewater, and resource recovery, with a much larger global installed base.
• Aquatech: US-headquartered provider of industrial water and wastewater treatment, desalination, and reuse solutions for power, oil & gas, mining, and food & beverage. Directly comparable to NSI on engineered industrial treatment packages and high-purity/reuse applications across similar verticals.

Broad incumbents

• Pentair: Diversified water solutions company with industrial and commercial treatment offerings, including filtration and process water. Overlaps with NSI on industrial process water and treatment equipment, though Pentair's portfolio is broader (including residential/commercial pool).
• Stantec: Global engineering, consulting, and construction firm with a dedicated Water practice serving municipal and industrial clients on drinking water, wastewater, and reuse projects. Comparable to NSI on municipal utility work and treatment-plant design, primarily through engineering services rather than proprietary tech.
• Xylem: Global water technology company with broad portfolio across pumps, metering, treatment (including legacy Evoqua), and digital solutions. Overlaps with NSI on industrial and municipal treatment projects, especially in Europe and the Americas, while also serving adjacent smart-water and metering segments.
• Ecolab: Global leader in water, hygiene, and process technologies with a major Industrial Water and Process Services division serving food & beverage, pharma, and heavy industry — directly mirroring NSI's industrial customer base and recurring-service model, though at much larger scale.
• Jacobs Solutions: Engineering services and consulting firm with a sizable water and advanced-facilities practice that designs, builds, and advises on municipal and industrial water projects. Comparable to NSI on large municipal treatment programmes, though via EPC/consulting rather than proprietary equipment manufacturing.

Regional players

• WABAG: Indian-headquartered global water treatment EPC player focused on municipal drinking water, desalination, and industrial wastewater projects across Asia, Middle East, and Africa. Closely comparable to NSI on turnkey municipal and industrial plant delivery, with overlapping reference base in the Middle East and Africa.

Emerging players

• DuPont Water Solutions: Membrane and separation technology provider (now part of Solenis) supplying reverse osmosis, ultrafiltration, and ion-exchange elements used in industrial and municipal water treatment. Competes with NSI's CeraMac and membrane-filtration portfolio in selected reuse and desalination projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries20 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about NSI WATER AND WASTEWATER SOLUTIONS LTD