By Challenge / Contaminant

    Nitrate Removal Water Treatment Companies

    Nitrate removal, ion exchange, RO, biological denitrification, and electrochemical processes.

    10 providers

    This page is a good fit if you need:

    • Conventional EC or Flat Sheet UF Membranes capabilities
    • Suppliers with food-beverage sector experience
    • Providers operating in United Kingdom or China
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    Ecosystems International logo

    Ecosystems International

    Verified
    Indonesia51-200 employees
    Flat Sheet Microfiltration Units · Hollow Fiber MF Systems · Ceramic Microfiltration Modules +80 more
    apac · china · europe +3 more

    PT Ecosystems International (PT ESI) was established at Jakarta on 21st November 2006. We are an industrial effluent treatment systems integrator specializing in electrocoagulation (EC), a unique waste water treatment profile. PT ESI has capabilities in designing complete waste water treatment solutions by combining various effluent treatment systems such as the electro-coagulation, biological, chemical processes and membrane filtration, offering its customers a wide and comprehensive range of solutions, tailored to suit their various needs – ranging from basic effluent treatment for discharge to effluent recycling for water reuse. The Company is experienced in handling the design, engineering, procurement, construction and operation of new Effluent Treatment Plants (“ETP”) and possesses expertise in retrofitting existing ETP to increase the flow rate and treatment capability without any major infrastructure increase PT ESI is also a premier waste water treatment service company specializing in handling waste water generated from Exploration (Drilling) and Produced Water. Customers in Indonesia include major Oil & Gas companies such as Pertamina, Exxon, Chevron, Petro-China and Medco. Operations in Indonesia are provided by both mobile and fixed units. At drill sites where waste-water recycling is required, PT ESI supplement these treatment units with skid mounted mobile Reverse Osmosis systems. The technologies and solutions employed by PT ESI are developed in-house and examples of these are its proprietary Trident™ Electro Contaminant Removal (“ECR”) system, the Stage Contaminant Removal (“SCR”) process and Mobile On-Site Waste-Water Treatment (“OWT”) units

    Reverse Osmosis (RO) Systems
    Ultrafiltration (UF) Systems
    Multi-media Filtration (MMF) Systems
    +63 more
    agriculture
    manufacturing
    Brine Consulting logo

    Brine Consulting

    Verified
    Netherlands1-50 employees
    Mechanical Vapor Recompression (MVR) · Atmospheric Evaporator · Spray Evaporator +130 more
    apac · china · europe +3 more

    BRINE CONSULTING delivers senior-level strategy, technical design, and actionable insight across the full lifecycle of water-related challenges. We support clients with advisory and due diligence, advanced brine management and resource recovery, industrial and municipal water reuse, and MLD/ZLD systems. Our team also leads ESG and climate-resilience strategy, innovation scouting, and international development and PPP advisory. With deep specialization in desalination, brine valorization, circular economy models, and high-impact infrastructure, we help organizations turn water and waste streams into opportunities, providing clear thinking, rapid delivery, and solutions built for real-world results.

    Activated Carbon Filtration
    Reverse Osmosis (RO) Systems
    Ultrafiltration (UF) Systems
    +85 more
    manufacturing
    energy-production
    Hangzhou Realize Technology Co., LTD. logo

    Hangzhou Realize Technology Co., LTD.

    Verified
    China1-50 employees
    Ultrasonic Cavitation Systems · Conventional Activated Sludge · SBR, MBR, IFAS +3 more
    china

    HANGZHOU REALIZE TECHNOLOGY CO., LTD. is a technology enterprise. The company collaborates with domestic and international universities such as Beijing University of Technology, Tsinghua University, and Berlin University of Technology to address the challenges of enhancing anaerobic efficiency and nitrogen removal in high-ammonia nitrogen wastewater. The core technologies foucs on energy-saving denitrification and enhanced green methane production. These two technologies can increase production efficiency of green methane by 20% and reduce costs of wastewater denitrification by 60%.

    Process Water Treatment
    Wastewater Treatment
    Advanced Treatment Technologies
    +8 more
    manufacturing
    energy-production
    Hainan Litree Water Purification Technology Industry Co., Ltd. logo

    Hainan Litree Water Purification Technology Industry Co., Ltd.

    Verified
    China200+ employees
    Tubular Ultrafiltration Units · Hollow Fiber UF Modules · Flat Sheet UF Membranes +17 more
    apac · china · europe +3 more

    Litree: Pioneering Ultrafiltration for a Water-Secure World Founded in 1992, Litree has dedicated 30+ years to redefining water purification through ultrafiltration (UF) membrane technology—our core expertise and passion立升(Litree). As a global high-tech enterprise rooted in independent innovation, we’ve evolved from a membrane R&D startup to one of the world’s leading water problem solvers, with over 146 core patents and state-of-the-art manufacturing hubs in Haikou and Suzhou, China立升(Litree). Our signature hollow fiber UF membranes are engineered to deliver unmatched performance: 0.01μm precision removes 99.99% of bacteria, viruses, and contaminants while preserving essential minerals—striking the perfect balance between purity and health立升(Litree). This technology powers our diverse solutions, from residential whole-house systems to large-scale municipal projects and industrial wastewater treatment, all designed for sustainability and cost-efficiency. What truly sets us apart is our commitment to making safe water accessible. We’ve completed projects serving 50,000+ residents with centralized purification systems that cut construction costs and footprint by 50% compared to traditional setups—proof that advanced technology can also be affordable. Today, our solutions reach 60+ countries, supporting 3,000+ industrial clients and millions of households worldwide. At Litree, water isn’t just our business—it’s our mission. We believe every drop matters, and we’ll keep pushing boundaries to create a future where clean, safe water is a universal right, not a privilege

    Ultrafiltration (UF) Systems
    Membrane Filtration Technologies
    pH Adjustment and Neutralization
    +64 more
    agriculture
    manufacturing
    EC Solutions logo

    EC Solutions

    Verified
    United Arab Emiratesfreelance
    Conventional EC
    apac · china · europe +3 more

    EC Solutions is a specialized consultancy focused on electrochemical technologies for water and wastewater treatment. We believe electrochemical processes, and electrocoagulation in particular, are among the most promising technologies in the water sector today. As a rule of thumb, anything that can be treated with conventional coagulation–flocculation can be pretreated with electrocoagulation, without adding chemicals. That means less chemical handling, lower sludge complexity, and more controllable treatment outcomes. We help industries evaluate, pilot, and implement electrocoagulation as a robust pretreatment or core process for color removal, heavy metals, TSS, emulsified oils, and complex industrial effluents. If you’re dealing with a difficult water challenge and want a cleaner, smarter alternative to chemical treatment, EC Solutions is built for that.

    Greywater Recycling Systems
    Industrial Process Water Reuse
    Industrial Wastewater Treatment Plants
    +2 more
    manufacturing
    food-beverage
    Evergreen Water Solutions logo

    Evergreen Water Solutions

    United Kingdom

    A leading supplier of progressive wastewater treatment systems Evergreen Water Solutions works closely with a number of international engineering companies whose expertise are in scalable wastewater treatment systems and containerised wastewater treatment systems for municipal and industrial application. Evergreen Water Solutions offers a comprehensive engineering service. Our company incorporates initial design and planning, to implementation of projects that are delivered on time and on budget. Our expertise in wastewater treatment covers infrastructure development, package sewage treatment systems and advanced treatment technology for wastewater recycling with the strictest treatment requirements. The goal of Evergreen Water Solutions is to exceed the expectations of our clients, foster long-term relationships, and make a positive impact on the environment and industry standards. Evergreen Water Solutions use innovative products and suppliers to source, design and implement leading environmental water and wastewater treatment products and solutions. All new equipment and suppliers are required to undergo pre-qualification program and a series of acceptances and trials are applied prior to the approval of the vendor. Evergreen Water Solutions’ pre-qualification program guarantees you our clients that the products we source are of the highest standard within the industry, these products along with the expertise within Evergreen Water Solutions ensures that the solution we provide will meet and exceed any expectation you might have.

    Treatment Works Products/Services
    Contractors
    ACWA Services Ltd logo

    ACWA Services Ltd

    United Kingdom

    ACWA is one of the leading UK players delivering innovative sustainable process solutions and technologies for both municipal and industrial clean water, wastewater and bio-solids treatment. ACWA design and execute resilient cost-effective technologies which address the needs of our clients and their regulatory drivers whilst helping to address climate change. ACWA provides expert technical products and services to the water, wastewater and industrial sectors. Our expertise combines practical experience with academic knowledge across a wide range of specialisms. These include: Design and build (digital delivery and off-site manufacture) Commissioning Project management We apply our extensive expertise to help our clients find the best sustainable, cost-effective solutions that meet all their requirements. We serve our wholesale water, wastewater and biosolids markets plus industrial food and beverage clients with their water needs. Our primary specialist areas are: Water treatment Wastewater treatment Industrial effluent Food and beverage TECHNOLOGIES In finding the best solutions we look at innovative ideas and turn them into reality producing some of the most sustainable technological solutions on the market. Our technologies include: Nitreat® Ion Exchange: This is a reversible nitrate removal process by which ions are interchanged between a solid and a liquid with no substantial structural changes in the solid. AquaPyr™ Tertiary Solids Removal Filter: This process is a simple filter that can also remove phosphorous using innovative cleaning technology producing low waste and using less power than other filters. Amtreat® High Rate Ammonia Removal: This process is a high-rate activated sludge process designed to treat wastewater streams and sludge liquors containing high concentrations of ammonia. DESIGN & BUILD ACWA’s in-house design capability is the architecture on which each project is meticulously built. The latest 3D models create precision imaging of all types of installations from a complex water or effluent treatment plan to a single piece of equipment to be integrated into an existing system. Through in-house engineers ACWA deliver a complete range of technical design and build expertise across projects and programmes of work that include, civil, mechanical, process and electrical, instrumentation and control and automation. PROJECT MANAGEMENT ACWA’s team of highly-experienced project managers, engineers and technicians work closely with clients and key project team members to deliver solutions in an efficient, timely, cost-effective and environmentally-responsible manner. Project management includes ensuring complete compliance with all relevant regulations, both European, national and where relevant, international, while at all times maintaining a clear focus on the project remit. Our responsibility is to ensure each project is a complete success, both for our client and for the environment. We actively identify and manage risks, issues, changes to requirements and quality standards to guarantee the best possible outcome. COMMISSIONING For hands-on commissioning services, ACWA is an industry leader, focussed on complex water and wastewater facilities for municipal and industrial clients. Commissioning is an essential step in project delivery. Without it we cannot have assurance of a quality outcome. Our in-house team provides comprehensive commissioning services getting involved at project start-up to take the project through planning design, construction and turnover, on time and on budget. ACWA’s multi-disciplined knowledge and expertise includes, system design, electrical testing, operations and maintenance (incl. training) as well as systems and process diagnostics, providing an authoritative and effective resource. WATER TREATMENT Our water expertise comprehensively covers the filtration spectrum from conventional strainers and filtration systems to the most advanced reverse osmosis and ion exchange technologies. Microfiltration Ultrafiltration Nanofiltration Reverse Osmosis / Desalination Ion Exchange Conventional Water Treatment Pressure Filters Gravity Filters Chemical Treatment Granular Activated Carbon WASTEWATER TREATMENT The days of wastewater disposal by methods that had no consideration for the implications to the environment are over. As water scarcity increases and the pressure to comply with ever increasing environmental legislation for effective effluent treatment intensifies, it has never been more important to choose the right wastewater partner who can provide a range of effective processes. ACWA can deliver those solutions. Preliminary Treatment Aerobic Biological Treatment Anaerobic Treatment Membrane Bio Reactor High-Rate Ammonia Removal (Amtreat®) Scrubber Effluent Treatment Plant Effluent Re-use Tertiary Treatment Sludge Treatment

    Designers
    Amazon Filters Ltd logo

    Amazon Filters Ltd

    United Kingdom

    Founded in 1985, UK-based Amazon Filters Ltd is one of Europe’s leading manufacturers and suppliers of bespoke filtration technology such as filter cartridges and housings. Our comprehensive range of products support critical liquid and gas applications in many industries. With over 40 years of continuous support to municipal water companies, we are ideally placed to solve water quality problems with our bespoke cartridge filtration technology. From small boundary boxes installations to large volume fully containerised system and rentable mobile skids, we can manufacture and supply it all. We offer solutions for: Turbidity Control Metals Removal (iron / manganese) Cryptosporidium removal Chlorine reduction Let us support your AMP 8 commitments: Securing Long Term Resilience Securing Cost Efficiency Securing Confidence and Assurance We operate a range of ISO-accredited Quality Management Systems to ensure excellence in customer service. We provide high quality, reliable products and services that exceed client expectations. We help you worry less about the filtration process so you can focus on what you do best.

    Accreditations
    EMS Industries Ltd logo

    EMS Industries Ltd

    United Kingdom

    EMS are a UK based manufacturer of positive displacement ram pumps and grit removal solutions used traditionally in the wastewater industries but also in the food waste (AD) sector. EMS Industries was established in 1995 and has since grown into a world-renowned name for providing robust, reliable products which have provided our substantial client list with many years of trouble free service. All EMS products are designed, manufactured and tested in our Stoke on Trent operational facilities where we can also offer additional services including spare parts, service and repairs, installation, commissioning, operator training packages and full CAD and 3D modelling services. As a framework provider to some of the major UK utility companies, we ensure that our products meet with all current legislation and continually strive to provide innovative products to the market place.

    Treatment Process Technologies
    Hydro International logo

    Hydro International

    United Kingdom

    Hydro International, a CRH company,  provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management processes, increase operational performance and reduce environmental impact. Hydro International can help water companies meet their AMP and environmental obligations, including the reduction of sewer overflows and the Water Industry National Environment Programme (WINEP). Hydro International provides total solutions for Inlet Works, Combined Sewer Overflows (CSOs), Stormwater Management, Flood Warning and Prevention, and Water Resource management, from design to supply and installation through to ongoing preventative maintenance, servicing and emergency repair.  These solutions include: Hydrometric data collection, monitoring analysis and reporting for river level, reservoir, network and weather. Continuous water quality monitoring for compliance with Section 82 of the Environment Act. Water resource analysis and consultancy. Stormwater management solutions, including options for Sustainable Drainage Systems. (SuDS) and Smart Maintenance. CSO event duration monitoring. CSO and storm tank treatment and screening. Passive flow controls for flood prevention schemes, SuDS, CSOs and WwTWs. Inlet works screening and grit removal solutions. Sludge screening. Dropping sewage or water safely from height. Hire, repair and maintenance of inlet works screens and screenings handling equipment

    Networks - Sewerage
    Asset Maintenance & Rehabilitation

    Nitrate Removal from Drinking Water: Ion Exchange, Biological Denitrification, and RO Treatment

    Nitrate (NO3-) contamination in drinking water sources arises from agricultural fertiliser application (nitrogen leaching to groundwater, typically 20 to 300 mg per L NO3 in affected aquifers), livestock manure, and septic tank effluent. WHO Drinking Water Guideline: 50 mg per L NO3 (11.3 mg per L NO3-N); EU DWD 2020 parametric value: 50 mg per L; US EPA MCL: 10 mg per L NO3-N (44.3 mg per L as NO3). Methemoglobinemia (blue baby syndrome) risk in infants below 6 months fed formula made with high-nitrate water at above 50 mg per L NO3; colorectal cancer associations in epidemiological studies at elevated nitrate exposure.

    Ion exchange (IX) using nitrate-selective anion resins (Type II strong base anion, quaternary ammonium with tributylamine selectivity for NO3- over SO42-) is the most widely installed technology for community water systems. Design: EBCT 2 to 5 minutes, service velocity 10 to 20 m per hr, regeneration with 10 to 15 percent NaCl brine every 100 to 500 bed volumes depending on influent nitrate and resin type. Nitrate-selective resins avoid chromatographic peaking (where standard Type I SBA resins displace captured nitrate at concentrations above inlet during SO42--loaded regeneration). Product water nitrate below 10 mg per L NO3-N achievable. Spent regenerant (high-nitrate brine at 1,000 to 5,000 mg per L NO3-N) requires disposal: sewer (with trade effluent consent at diluted concentration), agricultural land application, or biological denitrification of the regenerant.

    Biological denitrification uses heterotrophic bacteria (Paracoccus denitrificans, Pseudomonas denitrificans) in anoxic fixed-bed biofilters to reduce NO3- to N2 gas, using methanol, ethanol, or acetic acid as carbon source. Stoichiometry: 2.47 g methanol per g NO3-N removed. Design: HRT 20 to 45 minutes, carbon dose 3 to 4 mg CH3OH per mg NO3-N (slight excess to ensure complete denitrification), effluent residual TOC monitoring required (excess carbon dosing causes TOC breakthrough, requiring activated carbon polishing). Biological denitrification achieves NO3 below 1 mg per L with proper operation. Regulatory acceptance in the UK (Environment Agency guidance) and US (AWWA standards) requires validation data and ongoing performance monitoring. Product water must be disinfected before distribution.

    Frequently Asked Questions

    What is the safest level of nitrate in drinking water?

    WHO (2011) Drinking Water Guideline: 50 mg per L nitrate (NO3-), expressed as 11.3 mg per L as nitrate-nitrogen (NO3-N). EU DWD 2020: 50 mg per L NO3. US EPA primary MCL: 10 mg per L as nitrogen (NO3-N), equivalent to 44.3 mg per L as NO3, reflecting a more protective limit. The US limit is specifically protective of methemoglobinemia risk in infants below 6 months. The WHO value is based on a similar health endpoint but uses a different calculation basis. For adults and children above 6 months, risk of methemoglobinemia at 50 mg per L NO3 is very low; emerging epidemiological evidence links chronic nitrate exposure above 25 mg per L with increased colorectal cancer risk, which is driving scientific review of current guideline values in both US and EU.

    How does ion exchange remove nitrate from water?

    Nitrate-selective ion exchange uses a strong base anion (SBA) resin loaded with chloride ions (Cl- form). As groundwater flows through the resin bed, nitrate (NO3-) ions exchange with chloride ions on the resin surface (NO3- affinity for Type II SBA resin is approximately 3 times higher than Cl-), removing nitrate from solution and releasing chloride into the treated water. When the resin is exhausted (breakthrough of NO3 above treatment target), the bed is regenerated with 10 to 15 percent sodium chloride (NaCl) brine solution, which displaces captured nitrate from the resin and restores it to Cl- form. Key selection point: nitrate-selective resins must be specified (Type II quaternary ammonium with tributyl or tripropyl alkyl groups), as standard Type I SBA resins preferentially exchange sulphate over nitrate, causing nitrate chromatographic peaking during regeneration.

    Can reverse osmosis remove nitrate?

    Yes. Polyamide thin-film composite RO membranes reject nitrate at 95 to 99 percent. For a feed water at 100 mg per L NO3, a single-pass RO system achieves permeate at 1 to 5 mg per L NO3, well below the 50 mg per L EU DWD limit. RO provides simultaneous removal of other contaminants (arsenic, atrazine, PFAS, hardness) making it attractive for multi-contaminant situations. Limitations vs IX for nitrate-only removal: RO wastes 15 to 30 percent of water as concentrate (vs less than 5 percent for IX at 95 percent recovery); RO produces excessively pure water (may need remineralisation for taste and corrosion control); energy consumption 0.3 to 1.5 kWh per m3 (vs 0.1 to 0.5 kWh for IX). For small community supplies with mixed contamination, RO is often more practical; for large groundwater systems where nitrate is the sole target, IX at higher recovery is more economical.

    What happens to the nitrate removed by ion exchange?

    Nitrate removed by ion exchange ends up concentrated in the spent regenerant brine at 1,000 to 5,000 mg per L NO3-N in a brine volume equivalent to 3 to 5 bed volumes (approximately 5 to 10 percent of total water treated). Regenerant disposal options: (1) Sewer disposal - acceptable if the sewerage undertaker's trade effluent consent includes nitrogen; the WWTP can biologically denitrify the additional nitrogen load; (2) Agricultural land application - high-nitrate brine applied as a nitrogen fertiliser under IPPC/IED permit conditions; timing must coincide with crop uptake periods; (3) On-site biological denitrification of regenerant - a biological system uses methanol or acetic acid to denitrify the concentrated brine before sewer disposal, eliminating nitrate load; (4) Blending with treated effluent for dilution before disposal. Concentrating 10 mg per L NO3-N in feed water to 1,000 mg per L in regenerant (100 times concentration) produces 10 L of high-strength brine per m3 of treated water.

    Case Study·Rural drinking water supply, East Midlands
    Challenge

    A groundwater source supplying 4,200 properties had nitrate concentrations of 70 to 85 mg per L NO3, consistently above the EU DWD parametric value of 50 mg per L. Blending with a lower-nitrate borehole (30 mg per L) was insufficient to meet compliance on its own. The utility needed a reliable, long-term treatment solution sized for 1,800 m3 per day.

    Approach

    A nitrate-selective ion exchange system (two lead-lag vessels, Type II SBA resin, EBCT 4 minutes, NaCl regeneration at 15 percent) was installed. The IX system treated 60 percent of the flow, blended with 40 percent bypass to achieve 35 to 42 mg per L nitrate in the blended product. Spent regenerant (high-nitrate brine) was tanked and sent by agreement to a local agricultural cooperative for use as a liquid nitrogen fertiliser during spring application periods.

    Outcome

    Blended supply nitrate dropped to 35 to 42 mg per L across all monitoring points within three months of commissioning. DWI approval was granted six months after start-up. Regenerant disposal cost was offset 60 percent by the fertiliser value, reducing the net disposal cost to 8,000 GBP per year.

    Questions to Ask Shortlisted Providers

    1. 1

      What is the nitrate concentration, seasonal range, and co-occurrence of sulphate and chloride in the feed water?

      Sulphate competes with nitrate on standard SBA resins and causes chromatographic peaking; nitrate-selective resins and resin sizing must be based on the actual water chemistry.

    2. 2

      What is the agreed disposal route and consent for spent regenerant brine?

      Brine at 1,000 to 5,000 mg per L NO3-N cannot go to sewer without trade effluent consent; the disposal logistics must be contractually agreed before the system is designed.

    3. 3

      What is the permitted discharge standard for the treated water and the blending ratio?

      The IX bypass blending ratio determines the required IX effluent quality; tighter standards require higher IX resin capacity and lower bypass fraction.

    4. 4

      Is biological denitrification an option and what is the source of organic carbon for the reaction?

      Biological denitrification achieves below 1 mg per L NO3 but requires a methanol or acetic acid dosing system and more complex process management than IX.

    5. 5

      What DWI approval process applies to the IX resin and regenerant chemicals?

      Resin and regenerant chemicals must appear on the DWI List of Approved Products; new resins may require WRAS testing and DWI approval before use in drinking water.

    What Drives Cost in This Category

    Flow rate and nitrate concentration requiring treatment

    IX system capital cost scales with resin volume; high-nitrate feeds require more resin capacity and more frequent regeneration, increasing NaCl consumption and brine disposal costs.

    Regenerant disposal logistics

    Tanker haulage and agricultural disposal adds 15,000 to 60,000 GBP per year; on-site biological denitrification of brine eliminates haulage but adds 200,000 to 500,000 GBP capital.

    Brine tank and associated civils

    Brine storage, mixing, and dosing infrastructure can represent 20 to 30 percent of total system capital cost depending on regenerant volume and storage requirement.

    DWI approval and commissioning testing

    Regulatory approval adds 6 to 18 months to the project programme; sampling, analysis, and DWI correspondence costs typically add 30,000 to 80,000 GBP to the project.

    Key Regulations & Standards

    Water Supply (Water Quality) Regulations 2016

    Set the parametric value for nitrate at 50 mg per L; require DWI approval for all IX resins and chemicals used in treatment of drinking water.

    EU DWD / UK nitrate parametric value

    50 mg per L NO3 (11.3 mg per L as NO3-N) is the compliance standard in England and Wales; DWI monitors compliance and can require corrective action under Regulation 28.

    Nitrates Directive 91/676/EEC and NVZ Action Programme

    Governs agricultural nitrate application in Nitrate Vulnerable Zones; affects regenerant disposal to agricultural land and the timing, rate, and record-keeping requirements for brine application.

    WIA 1991 Section 118 Trade Effluent Consent

    Spent regenerant brine disposal to sewer requires prior written consent from the sewerage undertaker; application must detail brine composition, volume, and discharge schedule.