What Waterleau does

Waterleau is a Belgian-headquartered (Wespelaar) water technology company, founded in 2000 and operating as part of the family-owned Group Machiels conglomerate. The company designs, builds, finances, and operates water and wastewater treatment infrastructure for industrial clients (breweries, dairy, potato and starch processing, sugar, distilleries, textiles) and municipal/government customers across more than 85 countries, supported by eleven regional entities and an engineering hub in Porto, Portugal.

Its core technology stack is anchored on proprietary BIOTIM® anaerobic reactors (UASB, UAC, CSTR, Anaerobic Tower, Anaerobic MBR variants) for high-load industrial effluent and biogas recovery, LUCAS® aerobic systems (cyclic activated sludge and MBR) for municipal and post-treatment polishing, and AQUALITY® membrane filtration (UF, RO, HRRO) for process and drinking water production. These are complemented by the SmartLab® IoT/digital platform with SmartBox edge devices for predictive analytics and digital twin modeling, WaterleauBox® modular containerized plants, the Krofta DAF rental fleet, BIOTIM® Scrubber for biogas desulphurization, BIOTON® bio-filters for odor control, and the HYDROGONE® solar sludge drying system. The PFAS Test Bench mobile pilot extends the offering into the emerging 'forever chemicals' remediation vertical.

Waterleau generates revenue through five distinct streams: (1) Design & Build EPC contracts (one-time), (2) outsourced Operations & Maintenance under service-level agreements (recurring managed services), (3) WIFV/WaterLease capex-free Water-as-a-Service (subscription/performance-based), (4) Krofta DAF rental fleet (usage-based), and (5) consumables, spare parts, membranes, and chemicals (recurring hardware). The company is privately held with no public listing; Group Machiels remains the controlling shareholder, and a December 2025 €50 million joint venture with SFPIM and Ethias capitalized the WIFV financing vehicle rather than Waterleau's equity. The firm employs 600+ water experts, has accumulated 1,500+ project references, and ranks in the Global Water Intelligence Top 10 for biological wastewater treatment technologies.

Name

Waterleau

Legal name

Waterleau

Website

https://waterleau.com

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Waterleau is a Belgian water technology company providing proprietary wastewater treatment, water reclamation, and resource recovery solutions for industrial clients (breweries, dairy, food, textiles) and municipal governments across 85+ countries, with 600+ experts and integrated financing via WIFV.

Ownership category

akta.pro rank

Product category

Water and Wastewater Treatment Services

NAICS

Water, Sewage and Other Systems (2213), Sewage Treatment Facilities (22132), Water Supply and Irrigation Systems (22131)

SIC

Water Supply (4941), Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Totalizing Fluid Meters & Counting Devices (3824)

akta.pro primary industry

Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ)

akta.pro secondary industries

Water Reuse & Reclamation Infrastructure Construction (Recycled Water Systems) (IMAFAGAH), Monitoring & Control (Dosing Systems, Remote Monitoring, Sensors) (BPABAJAK), Industrial Water Reuse Utilities (ZLD/MLD & Process Water Recycling) (EUANAGAG), Water Treatment Plant Construction (Drinking Water) (IMAFAGAA)

Keywords

• Water treatment
• Wastewater treatment
• Anaerobic digestion
• Membrane filtration
• Water reclamation

Headquarters

HQ city

Wespelaar

HQ country

Belgium

HQ region

Europe

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Design & Build: Engineering, procurement, and construction of water and wastewater treatment plants including proprietary technologies BIOTIM®, LUCAS®, and AQUALITY®.
2. Operations & Maintenance: Full outsourced operations and maintenance services for water infrastructure with service level agreements and specialist water treatment operators.
3. WIFV Capex-Free Financing: Performance-based pay-per-drop Water-as-a-Service model where Waterleau owns, finances, and manages water assets off-balance-sheet for clients.
4. Krofta DAF Rental: Flexible rental solutions for dissolved air flotation technology including short-term and containerized options for temporary treatment needs.
5. Consumables & Chemicals: Supply of chemicals for biological processes, spare parts, membranes, biomass (anaerobic granular sludge), and equipment replacement.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

Waterleau designs, builds and operates water and wastewater treatment plants for industrial and municipal clients using proprietary biological and membrane technologies (BIOTIM® anaerobic, LUCAS® aerobic, AQUALITY® membrane filtration). The company delivers the full lifecycle from lab and pilot testing through engineering, procurement and construction to outsourced operations and maintenance, complemented by the SmartLab® digital platform for real-time monitoring, modular WaterleauBox® and Krofta DAF rental systems, and capex-free financing through the Waterleau International Finance Vehicle (WIFV).

Product overview

Waterleau is a world-leading water technology company offering an integrated portfolio of proprietary technologies, modular products, and operational services for water and wastewater treatment. The core technology stack comprises BIOTIM anaerobic reactors (UASB, Tower, UAC, CSTR, Anaerobic MBR, Solids) and LUCAS aerobic systems (including MBR and MBBR configurations), complemented by AQUALITY membrane filtration (UF, RO, HRRO). The SMARTLAB digital platform provides IoT-enabled monitoring, predictive analytics, and OPEX optimization. Supporting products include WaterleauBox modular containerized systems, Krofta DAF rental fleet, BIOTIM Scrubber for biogas purification, BIOTON bio-filters for odor control, and HYDROGONE solar sludge drying. Financial solutions through WIFV enable capex-free infrastructure deployment. Services span lab and pilot testing, full O&M outsourcing, consumables supply, and plant revamps. The company also offers specialized PFAS removal technologies including a mobile Test Bench for on-site assessment.

Differentiator

Problem solved

Functional benefit

Brands

• BIOTIM: Proprietary anaerobic wastewater treatment systems including UASB reactors, anaerobic towers, UAC reactors, CSTR reactors, anaerobic MBR, and municipal sludge digestion.
• LUCAS
• AQUALITY
• SmartLab
• WaterleauBox
• Krofta DAF
• BIOTON
• WaterLease
• HYDROGONE
• X-TRACTOR

Products and services

• BIOTIM Anaerobic Wastewater Treatment Proprietary anaerobic reactor technology for high-capacity wastewater treatment and biogas recovery, including UASB, Anaerobic Tower, UAC, CSTR, and Anaerobic MBR variants. Sold to industrial and municipal customers for treatment of high-organic-load effluents.
• LUCAS Aerobic Wastewater Treatment Proprietary aerobic biological treatment technology including cyclic activated sludge systems and membrane bio-reactors (MBR, MBBR) for municipal and industrial wastewater treatment.
• AQUALITY Membrane Filtration Membrane-based water treatment technology including ultrafiltration (UF), reverse osmosis (RO) and high-recovery reverse osmosis (HRRO) for producing process water and drinking water from any source.
• SmartLab Digital Water Platform Cloud-based IoT-enabled digital platform for water and wastewater treatment facilities providing real-time data access, advanced analytics, predictive maintenance, digital twin modeling, and an OPEX Dashboard for operational cost optimization.
• Krofta DAF Rental Capex-free dissolved air flotation rental solutions providing flexible, short-term treatment capacity through modular and containerized systems including Multifloat, Supracell, and Sandfloat DAF units.
• WaterleauBox Modular Wastewater Treatment Containerized modular wastewater treatment system that integrates all essential water treatment functions into interconnected containers, offered as temporary or permanent solutions with purchase or rental options.
• WIFV (Waterleau International Finance Vehicle) Off-balance-sheet investment solution that owns, finances and manages water and wastewater infrastructure on behalf of clients, enabling capex-free deployment through public-private partnerships and Water-as-a-Service agreements.
• BIOTIM Scrubber Biogas desulphurization technology using activated sludge as washing medium to remove H2S, extending combustion engine life and reducing chemical and water costs in biogas systems.
• BIOTON Bio-filter Biological odor control system using moist organic materials that adsorb and biologically degrade odorous compounds at wastewater treatment sites.
• PFAS Test Bench Mobile 40-foot containerized pilot plant equipped with 9 different PFAS treatment technologies configurable into 24 distinct process combinations for on-site PFAS treatment assessment before full-scale design.
• HYDROGONE Greenhouse Drying Solar-powered sludge drying technology using automated robots to stir digested sludge in greenhouses, reducing sludge volume and transportation costs for municipal sludge treatment.
• Lab and Pilot Testing Services R&D services including automated water sample analysis, pilot-based process evaluation, lab pilots (BIOTIM UASB, CSTR, Anaerobic Tower, LUCAS MBBR, Krofta DAF) and mobile pilot deployment.
• Operations & Maintenance Services Full outsourced operations and maintenance for water and wastewater treatment facilities, including Service Level Agreements, training, audits, and full O&M contracts.

Quantifiable outcome

• Up to 60% of electricity needs recovered from anaerobic digestion of wastewater in potato processing plants
• +4 more outcomes

Named customers11 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature8 records

Partnerships

Five partnerships are on record, tiered flagship and core.

• Bayer, AM-TEAM, Air LiquideflagshipStrategic or Co-development Partner · 2 April 2026Partners in Global Water Intelligence Award nomination 2026 for Industrial Project of the Year. Collaborative project combining expertise in industrial wastewater treatment.
• DedinicoreStrategic or Co-development Partner · 24 February 2026Strategic partnership formed to expand BIOTIM® anaerobic wastewater solutions in Brazil, strengthening sustainable water treatment and biogas recovery across the region.
• Group MachielsflagshipStrategic or Co-development PartnerParent company - family-owned global operator in renewable energy, environmental services, and real estate. Founded 1941, positions Waterleau as innovative player in green energy, sustainable waste disposal, and water treatment.
• SocrematiccoreStrategic or Co-development PartnerSpecialist in air pollution abatement, flue gas, and off-gas treatment subsidiary. Extends Waterleau's impact to air quality and industrial emissions control through integrated water-and-air approach.
• KroftacoreTechnology or IntegrationRental fleet partnership for Krofta dissolved air flotation technology. Waterleau offers Plug & Play solid-separation solutions including Multifloat, Supracell, and Sandfloat units as skidded or containerized options.

Scale indicators8 records

Recent moves6 records

Expansion highlights7 records

Market position

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/waterleau

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries10 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 Waterleau