Are you trying to figure out which companies lead the global effluent treatment market in 2025? Wondering which manufacturers provide the most reliable, efficient and sustainable ETP solutions? Curious about which brands are trusted by industries such as textiles, pharmaceuticals, chemicals, food processing and municipalities worldwide?
This article provides quick, practical insights to help you identify the top effluent treatment plant manufacturers in the world. You will learn which companies dominate the industry, what technologies they specialize in, and how their solutions help businesses meet discharge standards, reduce operational costs and support environmental compliance.
In the following sections, we introduce the Top 10 Effluent Treatment Plant Manufacturers in the World 2025, along with their capabilities, advantages and core technologies—read on to choose the right partner for your wastewater treatment needs.
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Company Name |
Headqurters |
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Saint-Maurice, France |
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2. SUEZ |
La Défense, France |
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3. Xylem Inc. |
Rye Brook, New York, USA |
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Lenexa, Kansas, USA |
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County Galway, Ireland |
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Tokyo, Japan |
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7. Ravi Enviro |
Vadodara, Gujarat, India |
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Vadodara, Gujarat, India |
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9. Pentair |
Ireland |
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10. Weilan |
Henan, China |
Company Profile:
Veolia Water Technologies is the water-technology arm of the global Veolia Group, delivering industrial and municipal water, wastewater and reuse solutions worldwide. The business builds on Veolia’s long history in water services and positions itself as a leading provider of technologies and turnkey projects that help customers meet regulatory compliance, reduce discharge and recover resources.
For Effluent Treatment Plant (ETP) projects, Veolia Water Technologies offers end-to-end capabilities — from pilot testing and engineered packaged ETPs to large EPC contracts and long-term operation & maintenance. Its portfolio includes membrane-based MBR systems (ZeeWeed® ultrafiltration), reverse osmosis and desalination, Zero Liquid Discharge (ZLD) solutions, chemical treatment programs, sludge treatment and thermal/evaporation units, mobile water treatment modules and digital monitoring/optimisation services. These capabilities enable Veolia to deliver modular, scalable ETPs, specialised industrial solutions (textiles, pharmaceuticals, petrochemical, food & beverage, mining) and reuse/recycling outcomes that minimise wastewater disposal and support regulatory compliance.
Establishment: 1853
Headquarters: Saint-Maurice, France
Main Products:
Company Profile:
SUEZ is a global specialist in water and waste management, operating across municipal and industrial markets to design, build and operate water treatment and circular economy solutions. The group brings together engineering, operations and digital services to help customers reduce environmental impact, secure water resources and comply with increasingly strict discharge regulations.
For Effluent Treatment Plant (ETP) projects, SUEZ delivers full-life solutions ranging from process design and engineered treatment infrastructure (through its Treatment Infrastructure and degremont® capabilities) to packaged and modular plants, membrane systems, ZLD and sludge handling, plus long-term Operations & Maintenance and digital optimisation (InSight and other asset-care tools). SUEZ emphasises customised industrial offerings (chemicals, petrochemicals, textiles, food & beverage, pharmaceuticals and mining), pilots and demonstrations, and integrated water-reuse solutions that lower discharge volumes and improve resource recovery.
Establishment: 2008
Headquarters: La Défense, France
Main Products:
Company Profile:
Xylem Inc. is a leading global water-technology company, dedicated to solving water and wastewater challenges across public utility, industrial, commercial, agricultural and residential sectors. Since its founding in 2011 (spun off from the water-related operations of ITT Corporation), Xylem has expanded rapidly and now does business in over 150 countries, with a workforce of approximately 23,000 people.
The company name “Xylem” is derived from classical Greek — referring to the tissue in plants that transports water — symbolizing their mission to transport, treat, test and return water to the environment with the efficiency of nature.
When it comes to Effluent Treatment Plants (ETPs) and wastewater treatment, Xylem brings a broad and modular portfolio of solutions: pumps and pumping systems for wastewater transport, filtration, disinfection, biological treatment equipment (membrane-based and conventional), and dewatering solutions.
Through well-known global brands (such as Flygt, Wedeco, Godwin and others), Xylem offers industrial and municipal wastewater treatment systems, mobile dewatering units, process-water handling, odor & corrosion control, monitoring/instrumentation and digital/analytics services — enabling integrated water-cycle management.
This versatility means Xylem can deliver everything from pump-based wastewater transport and pre-treatment, to full treatment and discharge control — making them a go-to provider for industries needing turnkey or modular ETP solutions, retrofit projects, or complex wastewater + water-reuse systems around the world.
Establishment: 2011
Headquarters: Rye Brook, New York, USA
Main Products:
Company Profile:
Smith & Loveless (S&L) is an established U.S. manufacturer of engineered water and wastewater systems, known for factory-assembled pump stations, headworks and packaged treatment plants used by municipalities, industry and commercial operators worldwide. The company traces its roots to founders B. Alden Smith and Compere Loveless and has a long history of delivering durable, energy-efficient systems from its manufacturing facilities in the United States.
Smith & Loveless offers a comprehensive ETP product set that spans prefabricated and field-erected packaged wastewater treatment systems (including TITAN MBR and TITAN MBR QUBE factory-built MBR units), engineered headworks (screening and grit removal), pumping & lift stations, filtration and solids handling/dewatering solutions. S&L emphasises modular, factory-tested assemblies that simplify site installation and commissioning, reduce lifecycle costs, and support retrofit or upgrade projects where space, schedule and reliability are critical.
Establishment: 1946
Headquarters: Lenexa, Kansas, USA
Main Products:
Company Profile:
Biocell Water is an Ireland-based specialist in packaged wastewater and sewage treatment systems, supplying domestic, commercial and light-industrial treatment solutions. The company manufactures prefabricated plants and foul pump stations and positions itself on ease of installation, independent certification and compliance with European standards.
Biocell focuses on compact, factory-built ETP solutions — septic and packaged sewage plants, prefabricated MBBR/biological systems and pump station packages — that suit decentralised or small-scale applications. The company highlights independent testing and product certifications (EN12566 series and related approvals) and factory quality controls, which support quick deployment, consistent performance and straightforward compliance for residential, commercial and small industrial clients. Biocell also supplies components and spare parts locally, helping reduce lead times for maintenance and replacement.
Establishment: 2010s
Headquarters: County Galway, Ireland
Main Products:
Company Profile:
Kurita Water Industries Ltd. is a long-established Japanese water-technology company that provides water-treatment chemicals, engineered treatment systems and operation & maintenance services to industrial and municipal clients worldwide. Founded in the late 1940s, Kurita has grown from a boiler-water chemicals business into a full-service water partner for industries such as semiconductors, power, petrochemical, pulp & paper and food & beverage.
Kurita’s Effluent Treatment Plant (ETP) capabilities combine chemistry, equipment and lifecycle services. The company offers wastewater treatment systems (including biological treatment, membrane systems and ZLD packages), a broad range of process and wastewater treatment chemicals, sludge and dewatering solutions, ultrapure-water systems for high-spec industries, and engineering/maintenance contracts that secure long-term performance and regulatory compliance. Kurita emphasises proprietary chemical formulations, in-house R&D and integrated service models (design → supply → O&M) that reduce operating costs, improve reuse rates and shorten project delivery for industrial ETP projects.
Establishment: 1949
Headquarters: Nakano Central Park East, Nakano-ku, Tokyo, Japan
Main Products:
Company Profile:
Ravi Enviro (Ravi Enviro Industries Pvt. Ltd.) is an India-based manufacturer and EPC provider of water and wastewater treatment systems, supplying engineered ETPs, STPs, WTPs and turnkey projects for industrial and municipal clients. The company positions itself on end-to-end delivery — from design and fabrication to onsite erection, commissioning and O&M — serving sectors such as chemicals, textiles, food & beverage and general industry.
Ravi Enviro focuses on compact, engineered and factory-fabricated effluent treatment solutions including biological treatment, MBBR/MBBR hybrids, DAF, membrane systems, RO (for reuse) and ZLD packages where required. The company highlights turnkey capability (design → manufacture → install → commission → O&M), local manufacturing in Vadodara, and quick deployment for industrial effluent streams — which makes it suitable for clients seeking India-based suppliers with shorter lead times and customised ETP plant configurations.
Establishment: 2018
Headquarters: Vadodara, Gujarat, India
Main Products:
Company Profile:
BT Water Treatment (B T Water Treatment Private Limited) is an India-based water and wastewater solutions company supplying turnkey ETP, STP and RO systems for industrial and domestic customers.
BT Water Treatment focuses on packaged and engineered effluent treatment solutions for a broad set of industries (chemicals, textiles, food & beverage, real estate and general manufacturing). Its product and service range includes engineered ETPs (physico-chemical and biological), MBBR systems, membrane-based ETP/RO packages, ceramic membrane systems, moving bed biofilm reactor (MBBR) modules, DAF/clarifiers, sludge handling and dewatering, and turnkey EPC delivery including installation and O&M. BT emphasises factory-built modules and local manufacturing to shorten lead times, plus certifications and field references that support compliance with regional discharge norms.
Establishment: 2008
Headquarters: Vadodara, Gujarat, India
Main Products:
Company Profile:
Pentair plc is a global water-technology company delivering products and systems that move, treat and improve water for residential, commercial, industrial and infrastructure applications. Founded in 1966, Pentair has grown through acquisitions and organic expansion into a diversified provider of pumps, filtration, membrane systems and water-management solutions, serving customers in more than 150 countries.
For Effluent Treatment Plant (ETP) applications, Pentair contributes modular and component technologies used across treatment trains — notably membrane filtration (Pentair X-Flow), industrial filtration housings and cartridge systems, submersible and process pumps, and advanced monitoring/instrumentation that support industrial wastewater handling, pre-treatment and reuse. Pentair’s strength lies in supplying reliable core equipment (pumps, membranes, filters) and integrated solutions that simplify plant design, reduce footprint and improve solids/liquid separation performance — making Pentair a common OEM partner for packaged ETP builders and retrofit projects.
Establishment: 1966
Headquarters: Ireland
Main Products:
Company Profile:
Henan Weilan Water Treatment Technology Co., Ltd. (Weilan) is a China-based specialist in packaged water and wastewater treatment solutions. The company focuses on delivering standardized and custom engineered plants for industrial and municipal clients, with a product range that covers packaged water treatment plants, filtration modules and biological treatment units. Weilan positions itself on practical engineering, reliable factory fabrication and a growing portfolio of delivered projects that demonstrate field performance and compliance with local discharge requirements.
Weilan’s Effluent Treatment Plant (ETP) offering emphasises modular, factory-built solutions and proven filtration/biological technologies — including package water treatment plants, underdrain filters, Dynasand systems, lamella settlers, denitrification filters, biological aerated filters (BAF) and monolithic filter underdrains. The company’s strengths are its strong technical capability (detailed design drawings and engineering), the ability to supply both standardized packages and customer-specific bespoke units, and a track record of over 200 project cases. These capabilities make Weilan well suited to clients seeking dependable packaged ETPs, compact filtration trains and reliable on-site performance with clear engineering documentation and local support.
Headquarters: Henan, China
Main Products:
Choosing the right effluent treatment plant manufacturer is essential for achieving stable performance, regulatory compliance and long-term operational efficiency. The companies listed in this article represent the global leaders shaping the future of industrial and municipal wastewater treatment, offering advanced technologies, reliable engineering and proven project experience.
If you are looking for a trustworthy partner that delivers both standardized and customized ETP solutions, Weilan stands out as a dependable choice. With strong technical capabilities, factory-built systems and more than 200 successful project cases, Weilan provides efficient, cost-effective and reliable solutions for diverse wastewater treatment needs.
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