Infrastructure, Networks & Equipment

    Sewage Treatment Plant Companies

    STP providers covering packaged, modular, and large-scale sewage treatment for municipalities and compounds.

    101 providers

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    • Suppliers with asset maintenance & rehabilitation sector experience
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    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.

    Networks - Water Supply
    Contractors
    Carlow Concrete logo

    Carlow Concrete

    United Kingdom

    Carlow Concrete is a market leader in water retaining precast concrete structures in both the United Kingdom and Ireland. Production at our state of the art plant in the South East of Ireland is carried out using the most modern and innovative methods and equipment, for the quality production of our products ensuring the highest standards of quality and specification compliance are achieved every time. As part of the Burren Precast Concrete Group, the company has the resources and infrastructure to meet the high demands of our customers in relation to quality of service and product. Our organisation benefits from a team with combined expertise of over 100 years in the precast industry. The company has the technical expertise, the flexibility in production methods and the resources to Interpret, Design, Manufacture and Assemble to the highest standards to meet the requirements of its customers, bringing modern methods of construction through the benefits of off-site construction, building information modelling (BIM) and highly experienced installation teams. Our expansive range of products are devised specifically for both water and wastewater projects and are unrivaled in terms of design, quality and ease of installation. Our solutions offer international, national and customer specification compliances and meet all water companies’ asset standards throughout the UK & Ireland. Site installations typically achieve 25% to 50% reduction in programme with fewer people and plant requirements, meaning substantial savings to both preliminary and direct costs. Stormwater attenuation. Flood alleviation. Service reservoirs. Precast filter bed wall and tile system. Activated sludge plant. Final/primary settlement tanks. Retaining walls.

    Storage Tanks
    Contractors
    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

    Treatment Works Products/Services
    EB Critical Group logo

    EB Critical Group

    United Kingdom

    EB Critical Group comprises of two entities; EB Critical Engineering Services and EB Critical Compliance. Both teams are highly skilled and experienced and offer national coverage for the UK’s water industry. EB Critical Engineering Services offer engineering and operational support to the UK’s water industry and industrial sectors. The team specialise in supporting Thermal Hydrolysis Process (THP) projects and highly critical steam plants. offering services such as 24/7 shift based operational support and monitoring, Steam Boiler Water treatment as well as being distributors for products supplied by Grundfos and ARI-Armaturen. Services/ Products available: Multi-skilled Engineering and maintenance Process reviews and consultancy Water industry operational support (emergency packages available) Steam system operations and management Steam boiler water treatment Technical boiler house risk assessments Steam and hot water boiler hire solutions Distribution of associated sector products. EB Critical Compliance offer Fire Safety provisions and specialist consultancy services, helping clients achieve total compliance for their critical industrial assets. Services/ Products available: Fire Risk Assessments Fire Extinguisher Supply and Maintenance DSEAR Assessments Legionella Risk Assessments Noise Assessments Electrical Inspections Industrial Human Factors Consultancy and Training. General Health and Safety Consultancy and Training

    Renewables & Energy Management
    Asset Maintenance & Rehabilitation
    Enisca Ltd logo

    Enisca Ltd

    United Kingdom

    Enisca is a multi-disciplinary design, engineering and construction business operating in the power and environmental sectors delivering innovative, sustainable and quality solutions for public and private sector clients in these markets. Enisca has developed and maintained strong partnerships and collaborative relationships in our industry. Our focus on safety, our customers’ needs, programme, cost and the efficiency of project delivery support our key objective of ensuring high levels of customer satisfaction. Design and construct Our experienced and skilled engineering teams work in partnership with our clients and related stakeholders from an optioneering stage through the cycle of design, construction, commissioning, training and handover to the aftercare of asset operation and maintenance. Process & MEICA design services. Feasibility ctudies and cite surveys. Carbon/energy and whole life cost assessment. Water treatment and pumping. Wastewater treatment and pumping. Industrial effluent treatment. Process plant and controls. Turnkey mechanical and electrical installation. Commissioning and training Our experienced skilled commissioning engineers (process, mechanical and electrical/control systems) endeavour to provide clients with a seamless, trouble free handover of completed projects from pre-commissioning through to process proving and training of operators. Power, control and automation Enisca Automation is the motor control centre and control systems integration division of Enisca. Enisca Automation provides a range of power distribution, control and automation solutions to a range of public, commercial and industrial clients. The Automation Division is TickIT accredited and our engineers work in partnership with our clients through the cycle of design, manufacture, commissioning, training and handover. Enisca Automation aftercare provision includes planned maintenance and service with emergency callout. MCC manufactured solutions to Form 2 and Form 4. ICA, SCADA, HMI and systems integration. G5/4 harmonic studies and reports. Power factor correction and surge protection. Thermographic surveys. Certified Profibus design and installation. Enisca Automation customers include a range of engineering & building services contractors, commercial and industrial business clients. Utilizing fully automated design, materials management, assembly and testing processes Enisca can supply product in compliance with the rigorous standards set out in BS EN 60439-1:1999 for low voltage switchgear and control gear assemblies, all products are fully CE certified. Process plant The in-house capabilities of our business set us apart. With the process, civil, mechanical, electrical and chemical engineering skills of our people we design and construct turnkey water and wastewater treatment and pumping solutions. In-house we design and manufacture water and wastewater process plant that can be incorporated into overall solutions. Our Power, Control and Automation Division designs, builds and commissions the motor control centres, automation software and SCADA systems that control our plants. Package treatment plants – Wastewater treatment for municipal and industrial applications. Package treatment plants – Potable water applications. Process plant manufacture. Screens. Scraper bridges. Picket fence thickeners. Package DAF plants. Package pumping stations and booster sets. Chemical dosing plants. Stormwater attenuation and pumping. Sampling and recording. Operation and maintenance Our operations and service engineers provide operation, maintenance, service and callout support. We have a strong, resourceful team to manage utility and industrial process plant installations. The Enisca Automation aftercare provision, includes planned maintenance and service with emergency callout.

    Networks - Water Supply
    Contractors
    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
    FP McCann Ltd logo

    FP McCann Ltd

    United Kingdom

    With sixteen divisions and twelve manufacturing plants, FP McCann is the UK’s largest precast concrete manufacture. They provide an extensive range of precast concrete solutions, including drainage, tanks, tunnels and shafts, rail, power and infrastructure, filter bed systems, walling, fencing, agricultural, architectural and structural building solutions, flooring, dock leveller pits and specialist precast products. McCann will customise their solutions to ensure they create maximum value for your project, accommodating your site conditions, design requirements and construction needs. The quality and reliability of McCann’s products and services are the foundation of their success. They are constantly developing and improving their solutions, whilst striving to exceed their customers’ expectations. McCann’s extensive range of precast drainage products include pipes, wide wall/manhole chambers/soakways, cover slabs, gullies, headwalls, box culverts, fall arrest systems, house inspection chambers, catchpits, flow control and valve chambers, hydrodynamic separators, rain harvesting systems etc. They also provide bespoke multipurpose tank chambers and panel systems. The geographical spread of their twelve modern precast manufacturing plants, coupled with their ability to deliver to their clients’ specifications on major projects across the UK and Ireland, has established McCann as a valuable and reliable partner. At McCann, they promise to build strong, sustainable relationships with their stakeholders. By implementing their corporate values, they aim to deliver on this guarantee through their products, services, communications and, above all, the behaviour of their people. They recognise the importance of operating with integrity and apply high standards of corporate governance in the conduct of their business.

    Precast Concrete
    FT Ductile Ltd logo

    FT Ductile Ltd

    United Kingdom

    Ductile Iron Pipe and Fittings FT Ductile supplies a wide range of high quality, ductile iron pipes, fittings and ancillary products to the water industry for both potable and dirty water. Large stocks at our premises allow us to fulfil many orders on a next-day basis. Whatever the size of project, we can provide a tailor-made solution to include the sourcing, supply, delivery and after sales service. We supply ductile iron pipes in a range of diameters, from 80mm to 1600mm. Over the years, the range of products supplied by FT Ductile has expanded to include everything from ductile iron pipes to flange adaptors and valves. We have a number of exclusive distribution agreements in place and all products conform to DWI standards. Ductile iron pipes are most commonly used for drinking water and sewage distribution, usually lined with cement mortar in order to prevent corrosion over time. The benefit of using ductile iron pipes in potable and waste water systems is that they are stronger and resistant to fracture. FT Ductile has supply chain links with companies in Europe, USA and the Far East which has given us strong foundations for understanding how other cultures and nationalities like to do business. This information is invaluable when we come to export our pipe products and services. Wherever you are based, and whatever you require, from individual items such as valves and fittings, through to more complex orders for lengths of ductile pipe and fittings, we will provide you with our best possible price. And you can rest assured that through our extensive transport links, our products will reach you in a safe and timely manner. To find out more regarding our ductile iron pipes and other products, please feel free to contact us.

    Treatment Works Products/Services
    Networks - Sewerage
    Gardner Denver Ltd – Robuschi logo

    Gardner Denver Ltd – Robuschi

    United Kingdom

    In a competitive and evolving global market, our long history of supplying aeration equipment in wastewater treatment plants that best meets customer specific requirements, makes Robuschi a trusted and reliable partner for the environmental industry. Cost-effective solutions for new plants or refurbishments of existing installations are a major focus of our product excellence and application expertise. Therefore, as a global supplier of environmental solutions, we lead the market in developing innovative technologies that support our customers in reducing life cycle costs, increasing efficiency, meeting legal requirements and, finally, improving the quality of product or services they want to provide to their own customers. In wastewater treatment plants, power consumption mainly comes from aeration machines. Robuschi supplies PD blowers and screw blowers, able to provide significant energy saving, depending on plant configuration. Additionally the Robox Energy combines the technological advantages of Robuschi screw compressor and permanent magnet motor with Smart Process Control tool to halve wastewater treatment plant running costs. Ecological sustainability is part of the Robuschi strategy, focusing on promoting environmentally friendly promoting, enhancing energy saving and protecting natural resources.

    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
    Kent Stainless Ltd logo

    Kent Stainless Ltd

    United Kingdom

    Solids Technology International was established in 1979 in Dublin, Ireland to develop high-performance belt filter dewatering equipment and innovative solutions for the water and wastewater industry. In 2002 the company was taken over by Kent Stainless. The manufacturing facility includes 3D laser cutting, CNC sheet, electro-polishing and bead blasting finishing plants. Employing over 100 people and resources including over 50 people with mechanical or electrical trades and over 20 design engineers working utilising 3D design packages gives Solids Technology the capability to supply turnkey thickening, dewatering and poly preparation solutions. Today there are over 800 Solids Technology belt filter systems worldwide and are one of the leaders within the marketplace for Stainless steel, fully enclosed, automated high-performance dewatering and thickening system. Our product range includes: Filter Belt Presses, Gravity Belt Thickeners, Poly Preparation Systems.

    Treatment Process Technologies
    Asset Maintenance & Rehabilitation
    KGN Pillinger logo

    KGN Pillinger

    United Kingdom

    Advanced Pumping & Engineering Solutions With a heritage dating back to 1926, KGN Pillinger is a trusted partner in engineering and manufacturing advanced pumping solutions for the UK’s critical water infrastructure. We combine decades of experience with a progressive investment in technology to deliver robust, reliable, and compliant systems designed for long-term performance. We specialise in the design and in-house manufacture of water and wastewater pumping equipment built to withstand the demands of the water sector. Our proven resilience and expertise have made us a trusted supplier to major UK Water Utilities and the Ministry of Defence. Capabilities Our core capabilities include: Bespoke water boosting systems for network resilience. Packaged pumping stations for sewage and wastewater management. Durable pumping equipment engineered for all sectors. Integrated lifecycle support and maintenance services. Design & Manufacturing Excellence Our end-to-end project management ensures quality and accountability from concept to commissioning: Advanced 3D CAD Design and Building Information Modelling (BIM) support for seamless project integration. In-house fabrication and assembly using 316L Stainless Steel as standard for superior corrosion resistance and asset longevity. A state-of-the-art, fully equipped UK manufacturing facility ensuring quality control and supply chain security. Lifecycle Support for Critical Infrastructure Our dedicated Service Division ensures the operational reliability of your assets: Emergency support and nationwide services to ensure uninterrupted service. Professional installation, commissioning, and planned maintenance contracts. All KGN engineers are CSCS certified, CRB checked, and trained for confined space work, ensuring safe and compliant service on critical infrastructure sites. KIWA Certification KGN Pillinger is the only UK company holding KIWA certification for both: Above-ground AV and EV variable speed booster sets. Below-ground UPOD Underground Plant Room. This dual certification underscores our commitment to meeting the highest industry standards for quality, compliance, and energy efficiency. To discuss your specific project requirements, contact our engineering team: 📞 0208 681 0097 | 📧 sales@kgnpillinger.com | 🌐 www.kgnpillinger.com

    Health & Safety
    Accreditations
    PBJ Engineering Services Ltd logo

    PBJ Engineering Services Ltd

    United Kingdom

    Do you need Thermal Hydrolysis Plant operational support, training and maintenance? Does your critical water process equipment require contract support and safety assurance? Visualise your assets and maintain operational efficiency through our 360 degree image capture. Invest in your operations through our professional training and technical support services. PBJ Engineering delivers a range of services to support your wastewater treatment and process facilities – we specialise in THP systems and Steam Boiler services, including CEA and BOAS accreditation.  Our team is available nationally to support you, on a contract, project or emergency basis. Supporting your facility and team with a programme custom designed to your needs, typically includes elements of: Whole System Contracts Consultation and Best Practice Commissioning and Maintenance Optimisation and Monitoring Refurbishment and Rebuild Component Fabrication and Supply Training for BOAS and CEA accreditation Some of our typical on-site activities include full capabilities in; Thermal Hydrolysis Plants Steam Boilers Sludge Dewatering Processes Water Treatment Coil and Heat Exchangers Pumps Our ancillary support services includes; 360O Image Capture – Virtual Plant Training and Maintenance Boiler Log Books – Custom design & print Boiler House design – Advice and guidance Equipment – Hire services and component spares Our priority is the safety of all personnel and the operational efficiency of your facilities.  We work with you and your team, to maintain and support your infrastructure – protecting your people, investment and optimising your asset performance. Our team is qualified with CITB / SMSTS, Achilles, and CEA / BOAS. Project involvement includes: Thames Water: Basingstoke THP (commissioning, operation, training, optimisation, maintenance) Beckton THP (energy surveys) Chertsey THP (operation, training, optimisation) Crawley THP (commissioning, operation, training, maintenance, part supply) Crossness THP (operation, optimisation, energy reduction, training, energy surveys) Longreach THP (operation, training, optimisation) Oxford THP (operation, optimisation, fault finding) Riverside THP (water treatment installation, design, energy surveys) Severn Trent: Finham THP (operational support) Strongford THP (operation, training) Southern Water: Goddards Green THP (operational support & performance monitoring) Others: Nestles – Trowbridge – steam boiler operational contract (24 hour call out) Heathrow airport – hot water boiler – scale cleaning

    Renewables & Energy Management
    Asset Maintenance & Rehabilitation
    Quantum Engineering Developments Ltd logo

    Quantum Engineering Developments Ltd

    United Kingdom

    Quantum Engineering Developments Limited specialises in the design, construction installation and commissioning of surge control systems, compressed air systems and booster pump sets. Surge Control Systems Surge conditions, or ‘water hammer’ can occur due to starting or stopping a pump, or failures in the power supply, controls or valves. Quantum Engineering is the leading UK supplier of surge vessels and related control equipment for the alleviation of this effect. All systems can include a patented QUBE controller, developed especially for surge vessel and accumulator control in complex variable flow rate and multi-pump systems. Packaged Booster Pump Sets The company supplies booster sets suitable for applications in final effluent and potable water booster pumps for sewage and water treatment installations. Control Panels Quantum Engineering specialises in the construction of multi-compartment control panel suites to suit the requirements of most UK water authorities. Electrical control panels are available with relay, PLC and microprocessor controlled logic systems, including variable speed drives and soft start, as well as conventional DOL and STAR/DELTA starters. Accreditation All systems are factory tested in house, and are assembled and fitted to meet current statutory requirements, including UK pressure systems legislation and DWI Regulations 25 and 31. Recent Contracts QED supply and install surge vessels via both main contractors and direct with the end users, to nearly all of the UK water companies on both new and replacement/refurbishment projects. What can Quantum do for you today?

    Accreditations
    Salix River and Wetland Services logo

    Salix River and Wetland Services

    United Kingdom

    Salix River & Wetland Services are bioengineering technical specialists, involved in the supply, contract and design elements of river, wetland and coastal projects. Salix has extensive experience working within all river types across the UK, providing innovative vegetated, sustainable solutions for soil erosion and wetland creation. SUPPLY Our in-house product range specifically developed for erosion control and habitat creation includes Coir Rolls, Coir Pallets, Rock Rolls, Rock Mattresses, Rock Bags and the world’s highest performing range of Composite Turf Reinforcement Mats – VMax C350 & C500. We also provide hydraulically applied solutions such as TerrAffix. We have the largest native wildflower and wetland plant nursery in the UK. Salix are the only company to manufacture coir rolls and pallets within the UK, providing a massive reduction in carbon. Salix rock products allow natural sediment accretion and vegetation establishment, unlike harder solutions such as rock armour or gabions. CONTRACTING Salix’s contracting division undertake works for local authorities, public bodies, utility companies, main contractors & private clients, having been involved in a diverse range of projects across the UK. Salix has unrivalled specialist equipment for fluvial environment, including a Mackenzie ‘Muck’ Spider excavator. The Spider has four independent legs, with the ability to access logistically challenging of sites. Salix also has long reach excavators, floating pontoons, hydroseeders and truxor available for a diverse range of specialist fluvial and intertidal activities.

    River & Coastal Flood Protection
    Contractors
    SAVECO Environmental Limited logo

    SAVECO Environmental Limited

    United Kingdom

    SAVECO Environmental Limited is a member of the globally operating WAMGROUP – market leaders in bulk materials handling since 1968. SAVECO provides state-of-the-art solutions to customers in the United Kingdom and in the Republic of Ireland, providing a comprehensive product range of machines and equipment designed for effluent pre-treatment and sludge treatment in both municipal and industrial wastewater treatment plants, as well as livestock farming and biogas plants. Delivering innovative, market-oriented, and industrially manufactured products, SAVECO has a proven track record of success – working on major projects with Tier 1 & 2 Contractors as well as leading water utilities. SAVECO is determined to supply the most comprehensive range of equipment available to deliver a one-stop solution to its customers. SAVECO assures customers in any place in the world the highest possible quality product and service at a fair price.

    Accreditations
    Sewaco Ltd logo

    Sewaco Ltd

    United Kingdom

    Sewaco Ltd specializes in design, manufacture, supply and construction of purpose built plant and equipment for use in water supply systems and treatment of municipal sewage and industrial waste water. Our range of products includes: HYCOVER Static & Rotary distributor systems (from 5 l/s up to 980 l/s flow range) with optional auto cleanse and electro pneumatic belt drive mechanism, respectively. HYRATE Polytower biofilter systems using modular plastic media for: High Rate (BOD/COD reduction), upstream of existing treatment plant. Secondary ( BOD removal only or combined BOD removal/Nitrification). Tertiary Nitrification applications, downstream of existing secondary treatment processes. HYRATE Polytowers can easily incorporate natural ventilation or air extraction systems for odour control purposes, as required. Factory built timber support matrix for secondary modular plastic media support. Modular media installation and re-packing undertaken by our experienced site team.

    Treatment Works Products/Services
    Asset Maintenance & Rehabilitation
    SPP Pumps Ltd logo

    SPP Pumps Ltd

    United Kingdom

    For more than 140 years SPP Pumps has been a leading designer and manufacturer of centrifugal pumps and associated systems, a global principal in design, supply and servicing of pumps, pump packages and equipment for a wide range of applications and industry sectors. This includes water and wastewater treatment, oil and gas production, airports, hotels, construction, mining and for large industrial plants. Low life cost and environmental considerations are fundamental design priorities. With its exceptional expertise and experience, the company’s robust, trusted engineering has provided critical performance across the water industry. As a UK manufacturer, SPP are a leading supplier of clean and wastewater pumps to the Water Industry and has long established Framework agreements with many of the major Utilities throughout the UK and Northern Ireland. SPP Pumps has extensive experience of designing and delivering highly efficient ‘Pump as Turbine’ (PaT) solutions capable of rapid return on investment. Small hydro-electric power production provides a convenient, cost-effective source of renewable energy.

    Asset Maintenance & Rehabilitation
    Steve Vick International Ltd logo

    Steve Vick International Ltd

    United Kingdom

    Steve Vick International (SVI) is dedicated to delivering cost-saving solutions for damaged, redundant or outdated underground pipework. Since its foundation in 1981, SVI has been at the forefront in developing products and techniques for the repair, renovation and decommissioning of pipes. Predominantly our work has been in the gas industry but increasingly we are undertaking projects in the water and nuclear sectors. We are the UK’s leading producer of Pipe Coil Trailers and offer a range of Pipe Handling equipment such as Handlers, Crackers and Cutters. Some of our latest innovations include the PE Pipe Cutter, the Pipe Feeder for Pre-Insulated coiled pipe, PE Live Head for Live Mains Insertion, the Perpetual Pipe Pusher, FBOS (Foambag Operation on Stubs) and SMARTester. WATER: For over 20 years water utilities and their contractors in the UK and overseas have used our pipe handling equipment to improve their efficiency and safety. Today our products include Pipe Handlers, Pipe Coil Trailers and Pipe Cutters as well as our patented DRAINBLOCK™ and RATBLOCK™ sealing systems. GAS: In the UK we are major suppliers to all the gas distribution networks. Many of the techniques we have pioneered have become the preferred methods of working in the industry and our resin foam sealant products and associated equipment are key to many of the cost-saving renovation processes used. NUCLEAR: SVI offer solutions to the problems associated with decommissioning and sealing disused pipework, ducts, sleeves and ventilation shafts. Our technology can also be designed for the mass filling of large and complex voids and is a lightweight alternative to cement grout. We have worked at Hinkley, Sellafield, Harwell, Chapelcross and Hunterston. CONTRACT SERVICES: A rapidly expanding part of our business is our Contract Service department who are well known for their work in the field of renewing and repairing underground gas pipes, for the UK Gas Distribution Networks. However, they are becoming increasingly involved in projects being undertaken by water utilities, electricity providers, rail networks, civil engineers, construction companies and local councils. This reflects the range of skills and expertise available to solve on-site problems associated with pipe repair, renovation, and diversion. Located strategically around the UK the highly skilled team can provide a fast response, emergency repairs and a rapid call out service which is offered 24 hours a day, 7 days a week. HIRE: We offer specialist plant and equipment for the Utilities Industries. Products available for hire include our Pipe Handlers, Perpetual Pipe Pusher, Pipe Coil Trailers, Rapid Rotary Cutters, Rapid Window Cutters, MACAW Pipe Crackers, CRACKERJACK and Mini Purge. All our hire equipment comes with onsite support from our highly experienced engineers and our products are fully maintained and serviced at our depots. All equipment is also available to purchase. SMARTester: SMARTester is the wireless pressure test system, that ensures absolute traceability and best practice. The system combines: SMARTester pressure sensor, an intuitive App and a Dashboard database of test evidence. Together the 3 components work to give you confidence that your tests are highly accurate, fully compliant and that evidence is traceable.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    Vogelsang logo

    Vogelsang

    United Kingdom

    Vogelsang are suppliers of Rotary Lobe pumps which are typically used in the waste water treatment sector to pump raw sewage and sludges, where the dry solid content is between 6% and 15% (by weight). Their use on an anaerobic digestion facility on a sewage treatment plant is very common application. The pumps are able to pass foreign bodies, can handle on a suction lift application (with a repeated self priming requirement) and are largely insensitive to dry running. The reversibility of the lobe pumps makes them suitable for membrane applications where running the pump in reverse allows for a cleaning of the membrane. We also offer inline RotaCut macerators and XRipper twin shaft grinders / shredders which are used to protect a downstream pump. These products too are in widespread use in the UK waste water treatment sector and are bespoke specified and manufactured to suit a specific application. The XRipper is suitable for both pipework and open channel applications and as with all of our products are robust and can be easily serviced by the end user without the need to remove it from site, ensuring the whole-of-life cost of ownership is minimised. We operate out of a facility in Crewe in Cheshire that has a comprehensive spares parts store. The company can provide both a field service and repair workshop service.

    Networks - Sewerage

    Process Selection and Regulatory Compliance in Municipal Sewage Treatment

    Municipal wastewater treatment plant design is governed by a hierarchy of regulatory requirements that flow from the Clean Water Act through NPDES permit conditions to specific technology-based and water quality-based effluent limits. Technology-based effluent limits (TBELs) establish minimum treatment performance—secondary treatment under 40 CFR Part 133 requires BOD₅ removal to 30 mg/L and TSS to 30 mg/L on a monthly average. Water quality-based effluent limits (WQBELs) may be significantly more stringent based on the assimilative capacity of the receiving water, adding nutrient limits (total nitrogen, total phosphorus), toxicity requirements, and temperature constraints.

    Process selection for secondary treatment typically comes down to activated sludge variants, trickling filters (with or without recirculation), and rotating biological contactors for smaller systems. Extended aeration, sequencing batch reactors (SBR), and membrane bioreactors (MBR) offer advantages in footprint, effluent quality, and operational flexibility. MBR systems produce consistently high-quality effluent suitable for reuse applications and eliminate secondary clarifiers, but their higher energy consumption and membrane replacement costs must be weighed against these advantages over the plant's design life.

    Nutrient removal—biological nitrogen and phosphorus removal—has become a near-universal requirement in new and upgraded municipal plants discharging to nutrient-sensitive water bodies. Biological nutrient removal (BNR) process configurations such as A²/O, four-stage Bardenpho, and UCT (University of Cape Town) process achieve nitrogen and phosphorus removal through carefully staged anaerobic, anoxic, and aerobic zones. Chemical phosphorus removal using alum or ferric chloride supplementation provides insurance against biological process upsets but generates additional chemical sludge. Providers experienced in BNR process optimization are essential for plants operating under tight nutrient permit limits.

    Frequently Asked Questions

    What is the difference between secondary and tertiary sewage treatment?

    Secondary treatment removes dissolved and suspended organics through biological processes—activated sludge, trickling filters, or equivalent—achieving typical effluent quality of BOD₅ below 30 mg/L and TSS below 30 mg/L. Tertiary (or advanced) treatment adds one or more additional process steps to meet more stringent effluent requirements: sand or membrane filtration to reduce TSS further, biological or chemical nutrient removal to reduce nitrogen and phosphorus, and disinfection (UV, chlorination) before discharge. Many NPDES permits for discharges to sensitive water bodies now require tertiary or advanced treatment as a baseline standard.

    How do I determine if my activated sludge plant needs biological nutrient removal upgrades?

    Check your current NPDES permit for total nitrogen (TN) and total phosphorus (TP) effluent limits. If TN limits are below 10 mg/L or TP limits are below 1 mg/L, you likely need a biological nutrient removal configuration. If you are approaching permit renewal in a nutrient-impaired watershed, anticipate that these limits will be applied or tightened. Request a feasibility study from a plant design firm evaluating BNR retrofit options for your existing tankage configuration before committing to a full upgrade design.

    What causes bulking in activated sludge and how is it corrected?

    Bulking—poor sludge settling caused by filamentous bacterial overgrowth—raises the sludge volume index (SVI) above 150–200 mL/g and can cause clarifier overflow and permit violations. Filamentous bulking is typically triggered by low dissolved oxygen in the aeration basin, low F/M ratio (extended SRT), nutrient deficiency, or septic influent. Corrective actions include DO aeration adjustment, selective chlorination of the return activated sludge (RAS) to selectively kill filaments, and process control changes to the SRT. A knowledgeable process engineer should diagnose the filament type microscopically before applying corrective measures, as different filaments respond to different interventions.

    What should I evaluate when selecting a design-build contractor for a new wastewater treatment plant?

    Evaluate the contractor's experience with the specific process configuration you require (activated sludge, MBR, BNR), not just general wastewater construction. Review their commissioning track record - ask specifically how many plants have achieved permit compliance within six months of startup and what the most common commissioning challenges were. Confirm that the contractor's process performance guarantee is backed by a financial bond or retention mechanism, and clarify who is responsible for process optimization during the warranty period if the plant struggles to meet permit limits.

    Case Study·Inland market town, 28,000 PE, East Midlands, UK
    Challenge

    A 30-year-old activated sludge works serving a growing market town was receiving effluent quality enforcement notices from the Environment Agency for consistent phosphorus exceedances above its 1 mg/L P consent, and the existing final settlement tanks were hydraulically overloaded at peak flow.

    Approach

    The works was upgraded under a design-build contract to a 4-stage Bardenpho BNR configuration with enhanced final settlement tank capacity and ferric sulphate dosing as a phosphorus removal backup. A new tertiary disc filter was installed to protect the downstream UVT and ensure final effluent TSS consistently met 10 mg/L for UV disinfection effectiveness.

    Outcome

    Total phosphorus in final effluent fell consistently below 0.5 mg/L within 3 months of commissioning, providing a 50% compliance margin against the 1 mg/L consent limit. Final settlement tank hydraulic capacity was restored with 25% headroom for population growth. The Environment Agency enforcement notices were closed following 6 consecutive months of compliant monitoring data.

    Questions to Ask Shortlisted Providers

    1. 1

      What is the design basis for peak wet weather flow, and does the treatment process maintain consent compliance at that flow or only at dry weather flow?

      Many treatment plants fail permit limits during storm events precisely because the process was designed only to average dry weather flow conditions.

    2. 2

      What nutrient removal configuration are you proposing, and what evidence do you have of it achieving our permit limits at comparable loading rates?

      Biological nutrient removal performance varies significantly between process configurations and loading conditions; evidence from comparable operating plants is essential.

    3. 3

      How does the process performance guarantee address the ramp-up period for biological cultures, and what is the contractual position if the plant does not meet consent limits within 6 months of commissioning?

      Biological commissioning routinely takes 3 to 6 months; the contract must define clearly whether the performance bond covers this period or only post-commissioning steady state.

    4. 4

      What are the energy consumption targets for the new works in kWh/m3 treated, and how do these compare with your reference plants of similar size?

      Energy is the largest operational cost driver at sewage treatment works; a poorly designed aeration system can double or triple energy cost versus a well-optimised design.

    5. 5

      How will biosolids from the upgraded works be managed and disposed of, and does the proposed process produce a biosolids quality suitable for agricultural recycling under the Biosolids (Use in Agriculture) Regulations?

      Biosolids disposal is increasingly constrained; a process producing a quality suitable for agricultural reuse avoids landfill and incineration costs that can represent 30 to 50% of operational cost.

    What Drives Cost in This Category

    Design population equivalent and flow rate

    Treatment works cost scales roughly with the 0.6 to 0.7 power of flow rate; a doubling of design PE does not double the cost but does significantly increase civil, mechanical, and electrical scope.

    Nutrient removal requirements

    Adding biological nutrient removal to a standard secondary treatment design typically increases capital cost by 20 to 40% due to additional tankage, recycle pumps, and blower capacity.

    Tertiary treatment and UV disinfection

    Tertiary filtration and UV disinfection stages to meet tight TSS and E. coli limits add approximately GBP 500,000 to GBP 2,000,000 to a medium-sized works upgrade depending on design flow and UV dose requirement.

    Biosolids management infrastructure

    On-site sludge thickening and dewatering to produce a cake suitable for agricultural reuse requires capital investment in centrifuges or belt presses and chemical conditioning, but reduces off-site haulage and disposal cost over the asset life.

    Key Regulations & Standards

    Environmental Permitting Regulations 2016

    Requires all sewage treatment works with discharges to controlled waters to hold an Environmental Permit specifying effluent quality consent conditions, including BOD, SS, ammonia, and phosphorus limits.

    Urban Wastewater Treatment (England and Wales) Regulations 1994

    Implements the EU UWWTD in the UK, requiring secondary treatment as a minimum for all agglomerations above 2,000 PE and more stringent nutrient removal for discharges to sensitive areas.

    Biosolids (Use in Agriculture) Regulations 1989 (as amended)

    Sets quality and application rate limits for sewage biosolids applied to agricultural land, including heavy metals, pathogen, and nitrogen content requirements.

    BS EN 12566 series

    Standards covering small wastewater treatment systems for up to 50 PE, specifying performance testing and installation requirements for packaged treatment units.