Wastewater & Infrastructure

    Water Plant Construction Companies

    General contractors and civil/mechanical solution providers constructing water and wastewater treatment facilities.

    81 providers

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    Eliquo Water & Energy logo

    Eliquo Water & Energy

    Netherlands
    2 technologies1 region

    Eliquo Water & Energy develops, builds, and operates plants for water and sludge treatment. Eliquo possesses a broad technology portfolio and delivers solutions for water boards, drinking water companies, and industrial clients.

    Fluor Corporation logo

    Fluor Corporation

    Netherlandsenterprise
    2 regions

    Fluor Corporation is one of the largest construction and engineering companies in the world. Fluor provides engineering, procurement, construction, and project management for complex projects in the energy, chemicals, and infrastructure sectors.

    Koninklijke Saan logo

    Koninklijke Saan

    Netherlands
    1 region

    Koninklijke Saan is a hydraulic engineering company specializing in the construction and renovation of civil engineering structures, bridges, locks, and wastewater treatment plants. Koninklijke Saan works for water boards, Rijkswaterstaat (the Dutch Directorate-General for Public Works and Water Management), and municipalities.

    A-Consult Ltd logo

    A-Consult Ltd

    United Kingdom

    A-Consult specialise in providing solutions for the storage and handling of liquids in the agricultural, water industries and industrial sectors. Established in 1986 we have successfully constructed over 10,000 tanks throughout the United Kingdom and Europe. Aqua-Tank provides a safe, cost effective method of containment with numerous applications within the water, waste and industrial sectors. Guaranteed factory-controlled quality combined with a robust structure along with tried and tested design principles, offer life expectancy previously only achieved with cast in situ installations. A-Consult are the market leaders in the design, manufacture and installation of precast concrete storage tanks. SETTLEMENT TANKS Settlement tanks can be supplied with either an integrated concrete coping top which supports the travel of either a full or half bridge scraper. Tank sizes range from 4.0m diameter to greater than 50.0m, designed to allow backfilling, enabling access to M&E equipment such as scraper bridge, motor and travelling wheels. Incorporating the patented EPDM jointing seals, the post tensioned settlement tanks can be designed to accommodate pipe work entries through the precast wall panels. Design and constructed to BS8110 and BS8007 and compliant to all relevant Euro Codes. FILTER TANKS The A-Consult tank system has been used to construct many types of filter tanks. The tanks can be designed as water retaining structures if necessary, with letter box opens to facilitate the trickling filtration systems. PROCESS TANKS In such a volume related sector the A-Consult precast concrete tank system offers extensive flexibility in both tank diameters and wall heights. Diameters start at 4m and increase in increments of approximately 350mm, wall heights start at 2m and increase in increments of 100mm topping out at 12m. STORAGE TANKS A-Consult tanks have been used for the storage of many different materials on both wastewater treatment plants along with sewage treatment plants. All materials used in the construction of our tanks are DWI or WRAS approved allowing the storage of potable water. LEACHATE TANKS With a 50-year design life the A-Consult precast concrete tank system offers a cost effective and robust solution to many process and storage applications.

    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

    Addicott Electrics Ltd logo

    Addicott Electrics Ltd

    United Kingdom

    Addicott Electrics specialise in the manufacture, installation and maintenance of Generator sets (up to 2500kw) and their associated control systems. Based at Teignmouth in Devon, the Company has over 30 years experience in the Generator Industry working with Public Utilities, Local Authorities, Hospitals, Police and Fire Services etc . AEL work with the client to ensure the generators selected is best suited to meet client’s own specification. All generators are constructed ‘in house’ and are of robust construction – and designed for manual, automatic or synchronised operation adapted to suit client own requirements: AEL offers a complete ‘turnkey’ package – supply of equipment, mechanical and electrical installation, commissioning and testing. All work is undertaken by Addicott’s directly employed skilled electrical and mechanical engineering team. Addicott Electrics is a full member of AMPS – the Association of Manufacturers of Power Generator sets. AEL also offer full after sales support and maintenance, refurbishment of existing plant and the hire of temporary generators.

    APL Construction Ltd logo

    APL Construction Ltd

    United Kingdom

    APL Construction was incorporated in February 2011 by Aidan Langan. The company headquarters are in South Lanarkshire, Scotland. APL Construction currently employs about 40 members of staff. The company turnover for 2023 was just over £5m. APL work mainly on Scottish Water projects however we have also carried out works on Severn Trent and Northumbrian Water projects. APL are capable in both water and wastewater sectors and carry out all the aspects of civil engineering required in these fields. The company continues to grow year on year and invests heavily each year on staff training, premises, fleet, plant, and equipment. The company currently has over £1m worth of owned plant at its disposal. Capabilities include: Cofferdams Deep drainage Concrete structures Groundworks Rising mains Butt fusion Pressure testing Ductile installations Ducting Cable laying Roadways Hard landscaping Additional information can be found on our website.

    Aquability OPS Ltd logo

    Aquability OPS Ltd

    United Kingdom

    Aquability OPS Ltd was established in 2015 and is a leading technical consultancy providing optimised process solutions in the wastewater treatment industry. We are trusted partners of water companies, contractors and consultants and a member of British Water - the trade body representing the supply chain to government and the water companies. Director, Nicola Henderson is a chartered Chemical Engineer with over 27 years experience in the water industry and is one of the UK’s leading SBR experts. She is well known in the industry and previous tenures include Director of British Water and Chairman of British Water’s Technical Forum and Municipal Group. After graduating from Bath University in 1990 with a degree in Chemical & Bio Process Engineering, Nicola started her career in wastewater treatment at British Steel, responsible for the operation of their water and wastewater treatment systems. She then spent 24 years working in the design and build arena where she gained widespread experience in the water industry across a number of fields. Aquability OPS draw on Nicola’s extensive experience to offer technical expertise and bid support in both municipal and industrial wastewater treatment. We combine a mix of technical knowledge and practical application, providing comprehensive, tailored services across four areas to provide: Process expertise to solve our clients’ wastewater treatment challenges. Leading SBR expertise to ensure your SBR plant is a success. Commissioning and operational support for effective commissioning and trouble free operation. Bid support to develop innovative cost effective solutions, focused and persuasive bid writing and creative, engaging presentations. Our services help our customers to win work, build knowledge, reduce delivery and operating costs and avoid compliance issues. Our goal is to deliver successful outcomes for our Clients and develop trusting and long lasting relationships.

    AUMA Actuators Limited logo

    AUMA Actuators Limited

    United Kingdom

    Based in Clevedon, near Bristol, North Somerset, AUMA Actuators Limited is the UK subsidiary of the global AUMA Reister GmbH and Co., the world’s largest manufacturer of electric valve actuators, operating on every continent, with 2,300 employees in 30 locations. AUMA Actuators Limited is the UK arm of global manufacturer AUMA Reister GmbH, manufacturing daily over 500 electric actuators for valves, penstocks and dampers. A trusted supplier to the UK water and wastewater industry, AUMA holds supply and maintenance frameworks with all major UK water companies. With a UK-based team of experts and a £2.5 million inventory held locally, AUMA ensures rapid response and fast-track call-off for urgent project requirements. AUMA provides electric actuators – including variable speed, explosion-proof and underwater variants – plus gearboxes for flow control across water and wastewater networks, backed by comprehensive service, maintenance, and support tailored to the specific needs of the UK water sector. Key Products • SQ and SA part and multi-turn actuators for Class A and B operation, torques from 10 Nm to 32,000 Nm extendable to 675,000 Nm with optional gearboxes. • SQR and SAR modulating actuators provide Class C control up to 1500 starts/hr. Torques from 15 Nm to 2,400 Nm depending on model chosen. • SQV and SAV variable speed actuators provide accurate close control of valve position and flow rate, with soft-open and soft-close ability that protect ageing assets while retaining speed of operation and emergency functions. Tripping torques from 10 Nm to 1000 Nm. Modulating versions SQRV and SARV are also available • Profox – compact actuators for part- and multi-turn applications – easy to set up, reliable and tough, for torque ranges up to 600 Nm (part turn) and 100 Nm (multi-turn) For explosive atmospheres, AUMA actuators are available with full ATEX certification. Please ask us for details. AUMA equipment is built for the digital world. Full Fieldbus integration, the ability to integrate and consolidate other plant signals and bidirectional control makes AUMA an ideal project partner, while the modular approach and versatile configuration of AUMA equipment makes it ideal when you are considering automation of existing assets.

    Bagnall Construction logo

    Bagnall Construction

    United Kingdom

    With over 25 years of expertise and experience in the construction and refurbishment of trickling filters both mineral filter media and structured plastic filter media. We pride ourselves on our reputation, customer care and service and our considerable expertise in this field. Offering a full build and refurbishment service, we supply and install filter bed walls, filter bed tiles, ventilation systems and various types of filter media. Our experience enables us to offer advice where required. For almost twenty years, we have specialised in the washing and cleaning of used filter media for re-use on site or to send to recycling facilities as appropriate; delivering significant cost and environmental advantages to the client. We have carried out scores of these projects giving us unrivalled experience in this field, with the opportunity to fine tune very effective methods tailored to each site and have developed a specialist portable washing system incorporating a Portafill 3000 wash plant.

    Bluewater Bio logo

    Bluewater Bio

    United Kingdom

    Bluewater Bio (BwB) is an award winning global specialist in technologies for cost-effective water & wastewater treatment. Headquartered in London, BwB’s range of best in class technologies have been deployed at over 100 sites globally. Next generation proprietary technologies With two fully commercialised technologies proven at utility scale, complemented by an active New Product Development pipeline, BwB’s capabilities now include: HYBACS (enhanced activated sludge process). FilterClear® (high throughput multi-media filtration). GHG-Tox® (nitrification and greenhouse gas monitoring). CFIC® (highly efficient UV system). Operational & Maintenance services (supporting a population equivalent of c. 1 million). World Class R&D team, based at Cranfield University, UK. Targets & goals BwB’s growing technology portfolio is focused primarily on the rapid upgrading, optimisation and monitoring of water and wastewater treatment plants. The company has a particular emphasis on reducing: Capital, operational and compliance costs. Energy & chemical consumption. Physical & environmental footprint. Greenhouse gas emissions. Construction and commissioning times. Combining its R&D expertise with a highly entrepreneurial business approach, Bluewater Bio not only develops its own innovations but also scours adjacent markets for complementary IP, licence opportunities and partnerships. Through this aggregation strategy, Bluewater Bio aims to be the natural choice for cost effective treatment, re-use and monitoring provision across the water, wastewater and process industries.

    Bramley Engineering (Lifting Gear) Ltd logo

    Bramley Engineering (Lifting Gear) Ltd

    United Kingdom

    Bramley Engineering ltd was established in Ivinghoe in 1981 by John & Davina Bramley following John’s apprenticeship and early career in South Africa. Now based in Leighton Buzzard and run since 2007 by Graham and Emma Bramley the company remains a family run business encompassing a hardworking, fun, and fair working ethos that benefits our customers, suppliers, and staff. Over the last 40 years the company has evolved to ensure it meets health and safety requirements, is up to date with legislation and has safe working practices. We became ISO registered in 2004 following a large project for the nuclear power sector, we have continued to develop our systems as demands and in-house practices have required it. Bramley Engineering manufactures many forms of lifting equipment including overhead cranes, gantries, monorails, jib cranes and davits. We specialise in bespoke lifting solutions and have over the years provided solutions for many varied situations. Using the latest in CAD technology Graham continues to improve and adapt his knowledge to the needs of the customer. Our customers are many and varied and include the water industry for whom we have been working for twenty-five years, construction companies both large and small and the rail sector. In 2018 we won a contract to provide a grid system of 18 cranes in Lincoln for Siemens rail, this project saw us win our first award for ‘working as one’ with the customer. This award was greatly appreciated as not only did it show the customers appreciation it reminded us that our working practices and ethos are in line with ‘lifting your expectations’. We are members of the Lifting Equipment Engineers Association (LEEA) whose knowledge and expertise are always on hand should we require assistance. They audit us annually and ensure we are up to date with latest legislation and that our working practices meet the needs of our customers. As well as the cranes and lifting solutions we provide LOLER examinations and sell all ‘below the hook’ lifting accessories. We have an online system that keeps records of all the equipment we have examined. Our customers can always have access to their certificates ensuring they are compliant with health and safety requirements. We hold stock of web and round slings, shackles and chain slings and welcome customers to visit our premises to discuss their needs. Bramley Engineering always welcome new and exciting challenges with both existing and new customers.  We relish the chance to expand our bespoke lifting portfolio and to use our extensive knowledge and innovative outlook to help others find their perfect lifting solution.  We are always striving to lift expectations.

    Bridges Electrical Engineers Ltd logo

    Bridges Electrical Engineers Ltd

    United Kingdom

    Bridges Electrical Engineers Ltd are a trusted intelligent engineering partner which specialises in MEICA engineering services. Our core purpose is to engineer sustainable assets which our valued customers are proud to own and operate. We provide customers with a comprehensive suite of in-house design, manufacturing, project management, and installation services including: Electrical Engineering Mechanical Engineering Project Delivery (Tier 1 & Tier 2) Capital Maintenance Services Full MEICA Design Off-Site Manufacture Packaged Plant Solutions Control Panels and MCCs Turnkey Delivery CompEx & DSEAR Specialising in high-performance, multi-disciplinary solutions, we serve our long-term client base with innovative, engineering solutions delivered through traditional site installation techniques or using modern methods of construction and off-site manufacture. Our services include packaged chemical dosing solutions, control panel and MCC manufacturing, skid and package plants, and off-site manufactured solutions. Operating as both a Tier 1 and Tier 2 our “all under one roof” approach provides expertise in areas like CompEx & DSEAR, 3D design and scanning, mechanical and electrical installation, and turnkey solutions.

    Cadman Cranes Ltd logo

    Cadman Cranes Ltd

    United Kingdom

    Cadman Cranes is a leading provider of lifting solutions in the UK with over 50 years’ experience and a reputation for quality, reliability and safety. At the very forefront of sustainability within the industry, Cadman Cranes offer responsible and collaborative turn-key solutions across all industries. From depots in Colchester and Brentwood, Cadman is ideally positioned to cover the East of England and beyond, living and breathing its mission to provide safe lifting solutions to industry and communities in a collaborate, considerate and sustainable way. Cadman has always placed great importance on delivering so much more than just crane hire. Its values are focussed on the success of its clients, its people and its community, and it takes great pride in going the extra mile on every job, no matter how big or small. Cadman Cranes add value to your hard work and offer a full-service lifting solution that goes far beyond just crane hire. It doesn’t just look for customers, it looks for partnerships based on trust, quality and safety. Services include: Contract lift services: Our complete package service is ideal for those who require a fully managed lifting solution, removing your risk and liability, and ensuring that we deal with all of the ‘heavy lifting’. Crane hire services: Cadman Cranes is the leading crane rental company in the East of England, providing crane hire across London, Essex, East Anglia, and all over the UK. With cranes available 24/7, 365 days a year, we are well positioned to keep your operations moving. Tank clearance, dredging, and grab solutions: Cadman Cranes offers innovative tank clearance solutions with our custom-designed grab attachment. The remote-controlled grab, mounted to the hooks of our mobile cranes, can reach up to 60 meters and handle a variety of materials, including sewage waste, sludge, grit, mud, and sand. This service is ideal for wastewater treatment plants, sewage facilities, digester tanks, aeration tanks, ports, and any industrial sites that require regular tank cleaning, maintenance, or dredging. Specialist lifting equipment for utility installation projects: Utilising our range of specialist lifting equipment, we have assisted on some of the most complex utility installation projects throughout the East of England, solving problems currently unimaginable by other mobile crane hire companies. Our innovative Compact Crawler Cranes, in combination with our remote-controlled telescopic hydraulic grab, have proved invaluable in providing the highest level of service and crane hire to the utilities sector. If you would like to work with Cadman Cranes or are looking to add a safe and considerate crane hire solution to your list of approved suppliers, Cadman would love to hear from you.

    Coleman James logo

    Coleman James

    United Kingdom

    At Coleman James, our purpose is to connect top talent with ambitious businesses in the built environment and rail sectors, helping companies and candidates grow and prosper. Dynamic, driven, capable, knowledgeable and culturally aligned; we employ a razor-sharp focus to searching for and selecting the very best people. We do this through our niche, dedicated team of award-winning recruitment consultants, who have over 200 collective years of experience and knowledge of your industry. We’re known for our long-standing relationships, enviable contacts book, broad network and our bespoke methodology, making us the specialist recruitment agency of choice for building services, civil engineering, construction, facilities management and rail. Ours is a consultative, tailored approach. Our clients don’t simply transact with us; instead, we build long-term, collaborative partnerships. We pay attention to the details, from pre-screening to psychometric testing, we match the right people to the right roles. We add value at every turn; we’re problem solvers who operate with absolute integrity, delivering customer excellence at every step and tangible results you can rely on.

    Concrete Repairs Ltd logo

    Concrete Repairs Ltd

    United Kingdom

    Concrete Repairs Limited (CRL) is a specialist asset maintenance contractor who is here to help you with the inspection, repair & refurbishment of your concrete water assets. CRL provide comprehensive repair and refurbishment services tailored to the needs of the water and wastewater sector throughout the UK. These include the inspection, repair, refurbishment and upgrading of service reservoirs, contact tanks, water towers & wastewater treatment plants. With over 65 years of experience, CRL understands the importance of maintaining water quality and supply to customers. Therefore, when planning repairs, we prioritise effective programming of the work and optimal utilization of the assets being repaired. Our choice of repair methodologies and materials always reflects this commitment. At CRL, we pride ourselves on being a reliable partner to the water companies. We collaborate closely with them to identify problems early, quantify the necessary repairs, and establish a timeline for refurbishment. Throughout this process, we focus on ensuring the longevity and optimal performance of the assets. CRL provide proven and successful cost-effective repair and refurbishment options which meet our clients’ objectives of upgrading and increasing the life of their structures. CRL is capable of undertaking individual projects of up to £20M, either under competitive tender, or through Partnering/Framework arrangements. Our broad experience across various sectors ensures we deliver efficient, robust, and technically advanced services.

    DAWSON-WAM Ltd logo

    DAWSON-WAM Ltd

    United Kingdom

    DAWSON-WAM are multi award winning, specialist civil engineering and piling contractors with operations throughout the UK and Ireland. The company undertakes both small and large-scale civil engineering and piling projects for residential, commercial and public authorities. The company was founded in 1971 and has grown to an organisation with an annual turnover in the region of £50M. Through DAWSON-WAM’s collaborative, problem solving approach we are able to offer a complete design and build service providing innovative, cost effective solutions to many of today’s construction related challenges. DAWSON-WAM also maintains an extensive, modern and highly capable plant fleet, complimented with regular annual investment. Please head over to our website to browse some of our previous works, and find out more about what we can do for you! Civils enquiries: est@dawsonwam.co.uk Piling enquiries: piling@dawsonwam.co.uk

    Donegan Civil Engineering logo

    Donegan Civil Engineering

    United Kingdom

    Founded in 1992 by Managing Director Valentine J Donegan and built on a personal reputation, Donegan Civil Engineering is a family-owned award-winning business that delivers the capabilities, expertise, innovation and experience to undertake large scale projects as either principal contractor or specialist sub-contractor. Our areas of expertise for the private and public sector includes: Shaft-Sinking Pipe-Jacking TBM Tunnelling Micro Tunnelling Hand Driven Tunnelling (including Timber Headings) Complex Sewer Connections S185 Utility Diversions and Crossings Pipeline Construction Opencut Drainage Large Cofferdam Excavations Reinforced Concrete Structures With a proven 30-year track record of delivering a range of projects, Donegan Civil Engineering continues to build on our fantastic reputation to continue to collaborate and innovate to ensure we continue to deliver for our long list of established clients and potential new clients. We own, maintain and operate an extensive fleet of general civil engineering and specialist plant and equipment including; tunnel boring machines, micro tunneling systems, pipejacking systems, shaft-sinking equipment, cranes, wheeled & tracked excavators, generators and light and heavy goods transport. Our continued investment in up-to-date technologies and equipment, as well as the continued development of our highly skilled operational teams has reinforced and enhanced our capability in all areas of operations. As a business we endeavor to develop long-lasting relationships with our clients, and our business has grown predominantly from repeat work and framework opportunities. Our ethos is simple; construction is about providing a service and as such we always work collaboratively and flexibly with our clients in a spirit of openness and honesty. We work diligently with our clients to find innovative solutions to traditional construction problems whilst applying the latest information and construction technologies to help drive efficiencies and reduce waste in our processes without compromising on quality.

    Drive Systems Limited logo

    Drive Systems Limited

    United Kingdom

    With over 35 years experience and knowledge of manufacturing variable speed electrical control systems, Drive Systems Ltd provide fixed and variable speed drives, control panels and will commission and install both the mechanical equipment and electrical supplies, as required. Drive Systems Limited is a wholly owned independent company founded in 1986 by its present directors to promote the use of packaged inverter drive systems into a wide range of industrial applications so that they could benefit from the flexibility of control and the large potential energy savings that this, then, emerging new technology could provide. Many areas of industry, from pet food manufacturers to woodworking machine makers and from the nuclear industry to the water companies became valued customers and benefited from bespoke packaged drive systems tailored to their specific application. The water companies soon became the source of the majority of the companies workload, with inverter based drive systems being developed for wet well submersible pump systems, rectangular bacteria bed distributors (both rope hauled and independently driven) and for circular filter bed distributor drives. This latter drive system, enjoying patent protection of its principles of operation, has been a huge success and over 2000 systems have been supplied into all of the UK`s Water Companies, as well as to numerous overseas locations. Drive Systems has recognised the need, not only to provide products and packaged control systems, but also to provide an installation and commissioning service which ensures optimised performance from the existing plant. Drive Systems site programme includes installation of both mechanical and electrical equipment on prepared foundations. The service is not complete without the inter connection of all items of equipment, including cables, cable trays and ducts, as required. Lighting, heating, ventilation are a natural extension of this work. Drive Systems can provide Fixed and variable speed drives for pumps and fans Control panels and cabinets designed for specific applications Percolating circular filter bed drives and control Percolating rectangular filter bed drives and control Complete installation both mechanical: cabling and electrical supplies Commissioning and test Servicing and repairs

    Dunphy Combustion Ltd logo

    Dunphy Combustion Ltd

    United Kingdom

    Dunphy have extensive experience in manufacturing, installing and maintaining ultra low NOx burners for sludge and wastewater treatment processes. Our burner designs mitigate the formation of thermal NOx through staged combustion supported by CFD optimised combustion heads and advanced touchscreen digital boiler/burner controls. When used with a correctly dimensioned boiler, NOx emissions are inherently low at 35mg. per kWh on gas and biogas. Burner components are designed and manufactured in materials which resist corrosion thus reducing expensive maintenance downtime. Design options also include sluice burners, retractable heads and web based software for the remote management of burners and boilers. Our factory laboratories have facilities to test the critical fuel characteristics of recovered sewerage biogases – including key calorific variations. This data then informs the engineering design of burners and boiler shells to optimise specific site combustion efficiency. Dunphy also specialise in the off-site manufacture of modular boiler houses for wastewater treatment sites. Our assembly hall adjacent to our main factory complex allows the construction of double tier containerised plant rooms which are delivered to site fully equipped and tested. The plant is ATEX compliant and we prepare all FDS reports, DSEAR analyses, SIL and risk assessments. Examples of our prefabricated energy centres can be seen on Thames Water, Severn Trent and Scottish Water sites – as well as municipal waste to energy locations. Dunphy customers benefit from direct contact with our engineers through the processes of project design, equipment manufacture and testing, installation and commissioning thus by-passing the alternative, lengthy third party contractual chain. Our customers include: Dŵr Cymru Welsh Water Uisce Éireann Northumbrian Water Severn Trent Scottish Water Southern Water Thames Water United Utilities Wessex Water Yorkshire Water

    EPC and Design-Build Delivery for Water and Wastewater Treatment Plant Projects

    Water treatment plant construction projects are delivered through several contracting models, each with distinct risk allocation and owner involvement implications. Design-bid-build (DBB) gives the owner maximum design control and allows competitive bidding on construction, but creates interface risk between the designer and contractor and longer overall project timelines. Design-build (DB) transfers both design and construction responsibility to a single entity, reducing interface risk and typically compressing schedule, but requires the owner to define performance requirements clearly in the basis of design before contract award. Engineering, procurement, and construction (EPC) adds procurement responsibility to the contractor scope, appropriate for process-intensive plants where equipment selection is integral to the process guarantee.

    Civil, mechanical, and electrical integration is the primary source of cost overruns and schedule delays in water plant construction. Mechanical equipment submittals that arrive late cascade into concrete foundation delays; electrical raceway conflicts with process piping discovered in the field generate expensive rework. Contractors with in-house design capability in all three disciplines, using a coordinated 3D building information modeling (BIM) workflow, consistently deliver better construction coordination than those who subcontract design and rely on 2D coordination drawings. Ask contractors to describe their clash detection and coordination process during proposal evaluation.

    Commissioning and startup for biological treatment processes—activated sludge, anaerobic digestion, biological nutrient removal—requires significantly more time and process expertise than mechanical equipment startup. Seeding and acclimation of biological cultures to design loads can take 60–120 days, during which the plant may not meet permit limits and a regulatory variance or temporary operating limit may be required. EPC contractors who include a process commissioning team with microbiological and process control expertise as part of their contract scope—not as an owner responsibility—provide substantially better performance milestone accountability.

    Frequently Asked Questions

    What is the difference between a design-build and an EPC contract for water plant construction?

    Design-build contracts combine design and construction under a single contractor responsible for delivering a complete facility meeting the owner's performance requirements. EPC (Engineering, Procurement, and Construction) contracts additionally transfer equipment procurement responsibility to the contractor, who selects, purchases, and is responsible for all major process equipment as part of the lump-sum price. EPC is the appropriate model when the contractor's equipment selection directly determines whether the process performance guarantee is achievable—as is the case for most water and wastewater treatment plants with defined effluent quality requirements.

    How should I structure a process performance guarantee in a water plant construction contract?

    A process performance guarantee should specify: the effluent quality parameters and limits to be met (tied to your regulatory permit or design basis), the influent quality envelope within which the guarantee applies, the test protocol for demonstrating compliance (typically a 30-day performance test at defined flow rates), the financial remedy if the contractor fails the performance test (liquidated damages plus obligation to remediate), and the boundary conditions that would relieve the contractor of guarantee obligation (e.g., influent quality consistently outside the design envelope). Vague guarantees referencing 'best efforts' or 'industry standards' are not enforceable.

    What commissioning milestones should be specified for a new water treatment plant?

    Commissioning milestones should include: mechanical completion (all equipment installed and pre-checked), wet commissioning (system filled, pumps operational, all instrumentation calibrated), cold performance testing (hydraulic and mechanical systems at design flow without process chemistry), chemical system startup (chemical dosing operational and validated), process performance test (effluent quality demonstrated against permit limits over a defined period), and beneficial use acceptance (owner acceptance of the plant for permanent operation). Biological treatment plants require a separate biological startup and acclimation milestone before the effluent quality test can be scheduled.

    How do I evaluate a water plant construction contractor's relevant experience?

    Request a project list filtered to plants of comparable process type (activated sludge vs. physical-chemical vs. membrane), comparable flow rate and capital value, and comparable contractual model (EPC vs. design-build). Visit at least two reference plants and speak directly with both the owner's project manager and the plant operations manager—construction quality and process performance are visible years after project completion, and operators see problems that owners may not surface. Ask specifically about commissioning challenges, change order history, and whether the plant met its permit performance requirements within six months of startup.

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