Infrastructure, Networks & Equipment

    Sludge-to-Energy Companies

    Anaerobic digestion, incineration, and pyrolysis systems recovering energy from municipal and industrial sludge.

    37 providers

    This page is a good fit if you need:

    • Anaerobic Systems or Conventional Activated Sludge (CAS) capabilities
    • Suppliers with contractors sector experience
    • Providers operating in United Kingdom or Netherlands
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    Air Technology Systems logo

    Air Technology Systems

    United Kingdom

    Air Technology Systems (ATS) have been designing and supplying ventilation and odour control solutions to the water industry for over 20 years. Working closely with the main contractors/M&E Contractors in the industry, we have installed our systems into all major water companies. Our Range of services include: Surveys of existing ventilation and odour control systems. Upgrades, maintenance and modification of existing systems. The design, supply, installation and commissioning of new ventilation and odour control systems. We have our own experienced installation teams. We have our own NIC EIC registered electrical engineers. We work collaboratively with the client to ensure that the system design is optimised and meets the primary objectives e.g TOTEX, Level of performance etc. VENTILATION Our ventilation solutions are a combination of traditional and propriety techniques, including our innovative JETFLO system which maximises the ventilation efficiency and can reduce the overall extract volume, excellent for reducing condensation and ensuring fresh air is delivered where needed, this not only reduces energy consumption, but can reduce the size and cost of odour control units. ODOUR CONTROL Our unique alliance with Europe’s largest manufacturers of specialist odour control products, CMI Europe Environment, is a major strength. We can offer all proven odour control technologies, from carbon filtration and catalytic dry scrubbers, through to bio filtration and chemical scrubbing. Solutions often require a combination of these techniques. All equipment on the odour control plinth is sourced from CMI EE’s state of the art facility and is pre-assembled for inspection prior to dispatch. This provides us with a unique level of quality control. Our specialist rope access division allows us to gain access to places where mechanical scaffold/access is going to be either very difficult or cost prohibitive. Our wide range of expertise design and project management experience, combined with close collaboration with the client is the reason we have an excellent reputation in the industry.

    Accreditations
    Odour Control
    Alpha Plus Ltd logo

    Alpha Plus Ltd

    United Kingdom

    Founded in 1987 Alpha Plus Limited have been providing quality pipework, fabrication and installation of pipework, structures and mechanical plant for the utility, waste management, industrial / commercial and manufacturing sectors. Alpha Plus is committed to providing clients with innovative, cost effective, high quality solutions. We work closely with clients providing design, fabrication and installation to a high quality using approved standards and up to date technologies. We provide a wide range of services with a wealth of experience in the following areas: Pipework. Installation. Structural. Design and project management. Site Maintenance. Alpha Plus has successfully completed numerous contracts, varying in size from £10,000 to £3M+ , usually as lead mechanical installer of varying values in the following areas. Potable Water The installation of new and refurbishment of existing filters (RGF, DAF, GAC & RO), chemical dosing equipment and LP Block/Leopold flooring. Works include manufacture and installation of: Filter internals. Aeration and process pipework. Access steelwork. Launders. Weir plates. Installation of pumps, blowers and associated mechanical packages, trough plates, media and penstocks. Wastewater Installation of various designs of deep beds filters, submerged aeration filters, sequencing batch reactors, digesters, activated sludge plant, tertiary filters, centrifuges, screens, classifiers. Works include manufacture and installation of: Filter internals. Aeration and process pipework. Access steelwork. Launders. Weir plates. Installation of pumps, blowers and associated mechanical packages, trough plates, media and penstocks. Waste to Energy/Power Generation Installation of biogas CHP systems, waste incineration plants, electrostatic precipitator installations, gas scrubber installations, digester heating/circulation and internals. Works include manufacture and installation of: High pressure super heated/saturated and low pressure steam. Natural gas. Fuel oil. Compressed/instrument air. Chemical dosing pipework. Access and support structures. Pipe bridges. Large bore ducting up to 2000mm (mild steel and stainless). Ash transfer systems. GRP acid/alkaline pipework. Installation of pumps, driers, scrubber vessels, tanks and associated mechanical packages.

    Mapping & Modelling
    Accreditations
    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.

    Designers
    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.

    Asset Maintenance & Rehabilitation
    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
    Costain logo

    Costain

    United Kingdom

    Costain works with water and wastewater companies to shape, create and deliver pioneering solutions that improve water quality, affordability and resilience. Population growth, regulatory changes, energy costs and climate change are having a dramatic impact on water usage. The national approach to managing water supply is changing to meet these challenges. The Government and industry regulator are tasked with cutting wastage and preserving an increasingly valuable resource, while protecting consumers from higher water bills. The water sector team offers: Expert input into consultation documents, close work with Government and water companies and innovative delivery, all of which help to minimise costs to water users while meeting national investment needs. A manufacturing mindset: programme optimisation advisory services, standard product development, production controls, whole-life costing and lean delivery processes. Cross-sector best practice: we provide value for our clients by drawing on experience from across the company and by working closely with our decarbonisation experts to drive regional growth strategies. Technology integration: working with some of the UK’s leading asset and data analytics organisations we analyse large volumes of real time data to create greater benefits for our customers through optimised maintenance, pump operation, energy and chemical usage. Current water industry frameworks: Anglian Water – Strategic Pipeline Alliance Severn Trent Southern Water – CMDP JV Thames Water United Utilities – Maintenance Service Provider Yorkshire Water – Technical Services

    Programme Management
    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
    Enpure Ltd logo

    Enpure Ltd

    United Kingdom

    Enpure Limited is a process engineering company specializing in water, wastewater and sludge treatment as well as waste-to-energy solutions with a global presence. Based in Birmingham, UK, we are a wholly-owned subsidiary of SKion Water Group. Our extensive expertise, proven designs and advanced technologies enable us to provide treatment solutions incorporating our specialist knowledge in filtration, purification, sludge treatment, biogas upgrading and anaerobic digestion of various feedstocks including sewage sludge, food waste and farming by-products. We offer our capabilities in feasibility assessments, concept development, design & engineering, construction and commissioning of turn-key projects along with the operation and maintenance of assets.

    Treatment Process Technologies
    Contractors
    FLI Precast Solutions logo

    FLI Precast Solutions

    United Kingdom

    FLI Precast Solutions (formerly FLI Carlow) provide design, engineering and manufacturing services for the off-site manufacture of specialist concrete infrastructure and attenuation systems. Our markets include Water, Wastewater, Energy and Storm Attenuation in the UK & Ireland and bespoke projects globally. SERVICES INCLUDE Design, engineering and manufacturing services for the off-site manufacture of specialist concrete infrastructure and attenuation systems. Design to national and international water industry standards and our semi-precast modular designs make us the industry leader in off-site concrete engineering and manufacture. By early involvement and integrating with our clients’ design teams we can accelerate and improve design optimisation and reduce cost. The value is in the solution, and off-site manufacturing and fabrication leads to higher efficiencies and lower risks and costs. Framework agreements enable us to add more value through collaboration, innovation, economies of scale, supply chain partnering and cost management. Our products and designs are engineered to provide solutions to many challenges facing our clients: water retention, water storage, water conveyancing, water management, water treatment, fire-resistance criteria, chemical resistance parameters, infrastructural products, retaining walls, coastal erosion, decorative walls, to name a few. We are a solutions provider using innovative off-site concrete engineering and our industry leading semi-precast modular designs. The company is part of the FLI Group which is a diversified group of companies providing environmental solutions, services and technologies to private and public sector customers in the UK, France, Ireland and throughout the world. PRODUCTS INCLUDE Service reservoirs Process settlement tanks (PST / HST / FST / etc) Storm & attenuation tanks (network or site based) Process structures (ASP / TSR / GAC / RGF / etc) MCC service foundations Bund wall system Chambers Channel & lids Comms chambers Multi-purpose chambers Bespoke culverts Holding tanks Barriers Demountable fence supports (international airport approved) Ballast blocks Dry flow channelling Foundation bases Blast fence supports

    Precast Concrete
    Concrete Works
    Gurney Environmental Ltd logo

    Gurney Environmental Ltd

    United Kingdom

    Gurney Environmental is a well established provider of systems and technologies used in the treatment of water and wastewater. From water supply to water re-use, we have designed and developed innovative, low cost and sustainable systems for the water and wastewater industries. Low CAPEX plus low OPEX equals low TOTEX. True sustainability is the benchmark for success with Gurney. We offer unique water and wastewater treatment systems, equipment and design including zero-to-low energy www and reservoir destratification systems. Our experience and knowledge of the water and wastewater treatment industries has successfully helped a wide variety of clients including major landowners (such as the Crown Estate) and many of the UK’s water utility companies. Our systems are today recognised internationally with a growing number of foreign municipals. Gurney has a total commitment to quality. Our systems and solutions represent the finest in long-term value, which is why we place such a strong emphasis on equipment with sturdy construction and fewer moving parts. Our commitment to a low total life cost is a key part of a commitment to quality.

    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
    JK Fabrications Ltd logo

    JK Fabrications Ltd

    United Kingdom

    With over 30 years of experience delivering expertise in the industry, JK Fabrications Ltd has become one of the front runners and will keep challenging ourselves and others to improve our Environment as we believe that; Our Environment, is our Future. At JK Fabrications, we are an engineering company that takes pride in our family roots, with an aim to continue to successfully grow our business. Our company values are incorporated into everything we carry out and we seek to work with like-minded companies. Established in 1998, JK Fabrications specialises in efficent, effective, and environmentally sensitive solutions to the Water Treatment, Waste Water, Waste to Energy, and Pharmaceuticals Industry. With over 30 years of experience delivering expertise in the industry, JK Fabrications has become one of the front runners and will keep challenging ourselves and others to improve our Environment as we believe that ‘Our Environment, is our Future’. With the ease of access to Northern Ireland’s principal motorway network and equal distance between both Belfast Airports and Dublin Airport, JK Fabrications’ 50,000 Sq/ft premises in Newry are the perfect location to produce and deliver your project. Design We have a fully equipped in-house design team with over 65 years of combined technical, manufacturing, and sector-specific experience, that are highly skilled and trained using the very latest design software. Manufacture We have built our reputation by producing specialised products for the waste-to-energy, wastewater, water treatment, and pharmaceutical industries. Our experienced welders and fabricators along with our state-of-the-art machinery make sure that each project is carried out to a high standard. Install We have an experienced installation team with a dedicated core team of engineers, mechanical fitters, and coded welders who have over 30 years of experience in the supply and installation of our fabricated products for a wide range of projects throughout the UK and Ireland. Commission Our experienced commissioning engineers will attend the site to oversee the installation of systems, plants, and equipment. They will commission, test, and optimise the equipment as well as provide the operators with operation and maintenance manuals. Products include: Stainless Steel Pipework | Stainless Steel Vessels (inc Pressure Vessels) | Mild Steel Pipework | Lamellas | Picket Fence Thickeners | Rectangular Bridge Scrapers | Half Bridge Scrapers | Conical Settlement Tanks

    Pipeline & Pipework Products
    Accreditations
    Nereda logo

    Nereda

    United Kingdom

    Nereda® technology from Royal HaskoningDHV offers sustainable wastewater treatment solutions for municipal and industrial water. The natural sewage treatment process purifies water with minimal or no chemical usage by using the patented aerobic granular sludge technology. Compared to activated sludge technologies, the biological treatment power of the technology is much larger, while saving up to 50% on energy costs, delivering high quality effluent for low costs and requiring only a quarter of the area of conventional activated sludge installations. Biomass in the process develops as fast settling aerobic granular sludge. These granules have excellent settling properties, so the process does not require a separate time-consuming decant phase like conventional SBR’s. All the biological treatment processes take place simultaneously in the granules, requiring only one tank. The technology is very versatile; it can be developed as a new build or used to retrofit existing conventional CAS or SBR plants. The benefits of the technology include: Excellent treatment results and settling properties: Compared to activated sludge technologies, the biological treatment power of the technology is much larger as a considerably higher concentration of biological active mass is applied that in addition has a much higher content of microorganism that are crucial for biological nitrogen and phosphate removal. Sustainable: Compared to conventional wastewater treatment processes, the technology not only has significantly lower energy consumption and associated greenhouse gas emission, but also produces, commonly without the use of waste generating chemicals, a remarkably high effluent quality. Cost effective: The technology results in construction costs that are lower than for conventional technology as for example, tank volumes are up to four times smaller and less equipment is required. Small physical footprint: Its footprint at sewage treatment plants is reduced due to the full nutrient removal process taking place in one single reactor. Easy to operate: It has proved in operation to satisfy the most stringent purification requirements. Thanks to the nature of the technology, plant operation is easy and process performance robust. The technology is proven and applicable for even the largest applications. Currently, there are over 70 wastewater treatment plants in operation or under construction all over the world

    Designers
    PLR Building Services Ltd logo

    PLR Building Services Ltd

    United Kingdom

    Here at PLR Building Services, our team brings extensive experience in the water industry, specialising in top-tier electrical installation work for framework companies across the utility companies. Our primary focus is on ensuring compliance with regulatory requirements for water systems. We offer a comprehensive electrical design package and project management services. Our team is equipped with the latest health, safety, and electrical qualifications to meet all your project requirements efficiently. As a NICEIC approved contractor, we excel in both new systems installation and the refurbishment of existing installations. Water treatment Wastewater treatment Sludge treatment Pumping stations Reservoirs Inspection Testing Electrical Design Project managing

    Contractors
    Water Pumping Stations
    SUEZ Advanced Solutions UK Ltd logo

    SUEZ Advanced Solutions UK Ltd

    United Kingdom

    Unique integrated water solutions and unrivalled expertise. Suez Advanced Solutions UK deliver innovative methods of water and wastewater management throughout the UK. Working with a wide range of customers in the industrial and utility sectors, SUEZ Advanced Solutions UK are focussed on tailored and integrated process solutions for measurable results. Suez Advanced Solutions UK’s suite of environmental technologies and services deliver optimised methods of water network management for the water sector. Utilising a wealth and depth of experience in water and sewerage networks, a wide range of pioneering and innovative process solutions are now successfully providing commercial benefits to water companies, and improving service quality for the end user. Our industrial water specialists deliver bespoke solutions based on the specific needs and process requirements of the customer, to provide reduced costs, energy and water consumption. Committed to continuous development through technical innovation, Suez Advanced Solutions UK transfer knowledge and expertise from a diverse range of industrial sectors, offering a comprehensive understanding of processes and relevant environmental and industry legislations.

    Asset Maintenance & Rehabilitation
    Asset Management
    Te-Tech Process Solutions logo

    Te-Tech Process Solutions

    United Kingdom

    Te-Tech Process Solutions is a provider of traditional products and advanced process technologies for water and wastewater treatment. Our products cater for a range of client needs from standardised products to bespoke applications designed to meet the exacting needs of the client’s process. Our in-house capability includes process, mechanical and electrical design, off-site manufacture and assembly, MCC and Control Panel Manufacture and System Integration. Our extended services include digital engineering, service and maintenance, operational support and real time control. Advanced technology and innovation are at the core of our business enabling us to provide high quality, efficient solutions to our clients. Our business is founded upon 4 key areas of expertise: WATER & WASTEWATER TREATMENT Te-Tech deliver established water and wastewater products and processes, including: te-cyc TM: Cyclic activated sludge ‘Macrofloc’ biological wastewater treatment te-saf TM: Packaged submerged aerated filters te-ion TM: Advanced oxidation technology for water and wastewater treatment te-mem TM: Advanced membrane filtration te-mbr TM: Package advanced membrane filtration te-sewpas TM: Airlift sludge removal plant te-uv TM: UV disinfection AUTOMATION CONTROL & TECHNOLOGY Our MCC and control panels are provided into multiple sectors including process and water, marine, oil & gas, energy, nuclear, defence and building services. Our capabilities include: MCCs LV Switchboards Local Control Panels Software System Integration DIGITAL ENGINEERING Te-Tech utilise cutting edge digital technologies to provide innovative solutions to our client’s problems. Our digital engineering services support the whole life cycle of our clients’ assets from conceptual design, through design for manufacture and assembly (DfMA), installation on site, final commissioning, operation and maintenance and decommissioning at the end of the asset’s life. Our in-house software capability provides clients with the visualisation tools to precisely view and interrogate designs in a virtual world to minimise clashes, delays or abortive activities and to ensure that the delivered assets are acceptable to operators in the real world. Our BIM capability ensures our products and technologies create assets that are fit for the future and our virtual reality technology allows our teams and clients to fully immerse themselves in the design, optimisation and operation of our solution prior to manufacturing. Our asset optimisation capability helps clients get the best performance out of their assets, by integrating real time control and using data driven insight we can ensure the sustainability and efficiency of asset performance across its lifecycle. Our virtual environment shows the equipment in operation, with liquids moving and plant turning on/off according to the actual system control philosophy. This is an invaluable tool for HAZOPS, ALM and remote training of operators before the plant is constructed – reducing risk and time on site OFF-SITE MANUFACTURING & ASSEMBLY Te-Tech’s off-site manufacture and assembly capability provides standard products and engineered solutions to the water and wastewater sector, oil and gas and energy industries. Its primary focus is on solutions which are designed for manufacture and assembly DfMA; reducing on site construction time, reducing carbon footprint and minimising risk. At our Southampton based headquarters we have over 1000 sq. metres of internal manufacturing space as well as external areas for assembly and storage of larger materials and manufactured components. We design, manufacture and assemble to a range of different standards including CE/CA marking, EXC2 Structural Steel, BS and ASME welding procedures. Our strength within Te-Tech culminates in our integrated service, offering the complete process solution package, from digital design, automation and control through to off-site manufacture and on site assembly.

    Treatment Process Technologies
    Contractors

    Sludge-to-Energy Technologies: Anaerobic Digestion, Thermal Hydrolysis, and Combustion

    Sludge-to-energy converts the chemical energy contained in sewage sludge organic matter into useful forms: biogas (methane, CH4) via anaerobic digestion; heat and electricity from biogas combustion in CHP (combined heat and power); or thermal energy from sludge incineration. Sewage sludge energy content: raw primary sludge 23 to 28 MJ/kg DS (similar to biomass); digested sludge 12 to 15 MJ/kg DS (after organic destruction); digestion typically destroys 35 to 55 percent of VS (volatile solids) and generates biogas at 350 to 450 L CH4/kg VS destroyed. Specific biogas yield: primary sludge 400 to 500 L/kg VS added; WAS 200 to 300 L/kg VS added; mixed primary + WAS 300 to 380 L/kg VS added. Biogas composition: 60 to 70 percent CH4, 30 to 40 percent CO2, trace H2S (100 to 3,000 ppm), siloxanes (from personal care products - must be removed before engine use). UK water companies generate approximately 1.2 TWh/year of electricity from biogas CHP, meeting approximately 30 percent of their treatment energy demand.

    Thermal hydrolysis pre-treatment (THP) significantly improves anaerobic digestion performance. THP process (Cambi, EXELYS, Veolia Biothelys): dewatered sludge (16 to 18 percent DS) is pasteurised at 165 to 180 degrees C and 6 to 8 bar for 20 to 30 minutes, then flash-cooled to atmospheric pressure ('flash'); cell walls are ruptured, releasing intracellular organics and improving biodegradability. Post-THP digestion: volatile solids destruction increases from 35 to 45 percent (conventional) to 55 to 65 percent (THP + digestion); biogas yield increases 30 to 50 percent; digester feed can be increased from 4 to 6 percent DS to 10 to 12 percent DS (reducing digester volume by 50 percent). UK THP installations: Cambi systems at Beckton (Thames Water, 6 trains, 80,000 tonnes DS/year), Davyhulme (United Utilities), Edinburgh (Scottish Water). THP also achieves Enhanced Treated Sludge (ETS) classification under ADAS Safe Sludge Matrix, enabling agricultural land application without the restrictions of conventional digested sludge.

    Sludge combustion (incineration and co-incineration): dedicated mono-incineration destroys all organics, pathogens, and pharmaceuticals/microplastics; produces non-leaching ash (rich in phosphorus, 10 to 15 percent P2O5) suitable for phosphorus recovery via thermal/acid extraction (Ash2Phos, Stuttgarter Verfahren) or direct cement clinker incorporation. Incineration process: fluidised bed combustion (FBC, Andritz, Veolia, Babcock and Wilcox) at 850 to 900 degrees C is preferred for sludge (self-sustaining combustion at DS greater than 35 percent NCV greater than 5 MJ/kg; supplementary fuel if below); waste heat recovered as steam for turbine electricity generation or heat export. Air emission controls (WID/IED Annex VI): selective non-catalytic reduction (SNCR) or selective catalytic reduction (SCR) for NOx; bag filters for particulates; activated carbon injection for dioxins and mercury; wet scrubber for SO2 and HCl; dioxin TEQ less than 0.1 ng/Nm3. Gate fee for dedicated sludge incineration: GBP 60 to 120 per tonne wet cake (25 percent DS). Co-incineration in cement kilns and power stations: lower gate fee (GBP 30 to 80/tonne) but requires dried sludge (greater than 90 percent DS) and pre-approval under co-incineration permit conditions.

    Frequently Asked Questions

    How much energy can be generated from sewage sludge?

    Sewage sludge energy generation from anaerobic digestion + CHP: a 100,000 PE WwTW producing approximately 5 tonnes DS/day of mixed sludge: biogas yield approximately 300 L/kg VS added at 65 percent VS content: total biogas approximately 975 m3/day; CHP engine at 38 percent electrical efficiency and 45 percent thermal efficiency: electrical output approximately 87 kW (2,100 kWh/day); thermal output approximately 103 kW (2,500 kWh/day heat). Treatment energy demand for 100,000 PE WwTW: approximately 3,000 to 5,000 kWh/day electrical. Thus, biogas CHP typically offsets 30 to 50 percent of site electrical demand. UK industry averages: 0.15 to 0.25 kWh electricity generated per m3 wastewater treated. With THP pre-treatment, biogas yield increases 30 to 50 percent, potentially covering 50 to 70 percent of site energy demand. UK water industry target (Ofwat, Water 2020): energy self-sufficiency; some advanced sites (Anglian Water Cambridge WWTP, Severn Trent Coleshill) claim greater than 100 percent energy self-sufficiency via maximised sludge co-digestion with food waste or FOGS (fats, oils, grease, and sugars).

    What is thermal hydrolysis and how does it improve biogas yield?

    Thermal hydrolysis pre-treatment (THP) applies high temperature (165 to 180 degrees C) and pressure (6 to 8 bar) to dewatered sludge for 20 to 30 minutes before anaerobic digestion. The process ruptures microbial cell walls and hydrolyses complex polymers (proteins, lipids, carbohydrates) that are resistant to enzymatic attack in the digester. Effect on digestion: (1) VS destruction increases from 35 to 45 percent (conventional) to 55 to 65 percent (THP+AD); (2) Biogas yield per tonne VS added increases by 30 to 50 percent; (3) Higher digester feed concentration possible (10 to 12 percent DS vs 4 to 6 percent without THP) - reduces digester volume by 40 to 50 percent; (4) Improved dewatering of digested sludge (30 to 35 percent DS on centrifuge vs 18 to 25 percent without THP). Commercial systems: Cambi (Norway, market leader), EXELYS (Veolia, continuous vs batch), BioThelys (Veolia), Haarslev, Sustec. Capital cost: GBP 3 to 8 million for a 5 to 20 tonne DS/day system. THP also achieves Enhanced Treated Sludge status enabling broader agricultural land application options.

    Can sludge be used as a fuel?

    Yes. Dried sewage sludge (DS greater than 90 percent) has a net calorific value (NCV) of 10 to 15 MJ/kg DS (compared to biomass 14 to 19 MJ/kg and coal 25 to 35 MJ/kg) - sufficient for co-incineration as a substitute fuel. Applications: (1) Cement kiln co-incineration: dried sludge pellets replace coal in cement clinker production; ash incorporated into clinker (recovering inorganic minerals including phosphorus); requires pre-approval under co-incineration permit; typical acceptance criteria DS greater than 90 percent, NCV greater than 10 MJ/kg, heavy metal limits per IED Annex VI; gate fee GBP 30 to 80/tonne dried pellets; (2) Power station biomass co-firing: dried sludge co-fired with biomass at less than 5 percent of fuel blend; permitted at some Drax-type biomass stations; requires similar quality specification; (3) Dedicated sludge incineration with energy recovery: fluidised bed combustion at 850 to 900 degrees C; gate fee GBP 60 to 120/tonne wet cake at 25 percent DS; electricity generated approximately 0.2 to 0.5 MWh/tonne DS (depending on moisture content); (4) Pyrolysis/gasification (emerging): thermal conversion at 500 to 800 degrees C in oxygen-limited environment produces syngas and biochar - limited commercial scale as of 2024.

    What regulations govern sludge-to-energy incineration?

    UK and EU sludge incineration regulations: (1) EU Industrial Emissions Directive (IED, 2010/75/EU), Annex VI: applies to dedicated waste incineration plants (capacity greater than 3 tonnes/hour) and co-incineration plants; sets emission limit values (ELVs): total dust less than 10 mg/Nm3; NOx less than 200 mg/Nm3; SO2 less than 50 mg/Nm3; HCl less than 10 mg/Nm3; CO less than 50 mg/Nm3; dioxins/furans less than 0.1 ng TEQ/Nm3; mercury less than 0.05 mg/Nm3; (2) UK: IED transposed in Environmental Permitting Regulations 2016 (EPR), Schedule 13, Part 2; regulated by EA (England), NRW (Wales), SEPA (Scotland); Environmental Permit required; (3) Best Available Techniques (BAT) conclusions: BREF documents for waste incineration (updated 2019) specify BAT-AELs for UK/EU facilities; (4) EU Sewage Sludge Directive (86/278/EEC): regulates agricultural disposal; under revision 2024 to include microplastics, pharmaceuticals, and PFAS limits; ash from sludge incineration is regulated as waste under EWC code 19 01 07/19 01 11 (hazardous if heavy metal thresholds exceeded); (5) UK EPR Schedule 3B: phosphorus recovery from sludge incineration ash is encouraged under resource recovery provisions.

    Case Study·Wastewater sludge energy recovery
    Challenge

    A regional water company in Yorkshire managing six WwTW with a combined output of 28,000 tonnes DS per year had an ageing CHP fleet averaging 32% electrical efficiency. Rising natural gas prices for digester heating and increasing sludge disposal costs (GBP 68 per tonne wet cake) were eroding the business case for the existing mesophilic digestion and centrifuge dewatering chain.

    Approach

    The company invested in thermal hydrolysis pre-treatment (Cambi THP) at its largest 280,000 PE works, enabling high-solids digestion at 10% DS feed and achieving 60% VS destruction. A new high-efficiency CHP engine (Jenbacher J620, 43% electrical efficiency) replaced two ageing units. Dried biosolids at 92% DS were secured under a 10-year co-incineration contract with a local cement manufacturer at GBP 45 per tonne, saving GBP 23 per tonne versus the previous land-bank contractor route.

    Outcome

    Biogas production increased by 44% per tonne DS input. CHP electricity output rose from 1.8 MW to 2.9 MW, meeting 87% of the works' electricity demand. Sludge disposal cost fell by GBP 336,000 per year. The project achieved positive NPV in year 8 on a GBP 6.2 million capital investment. Carbon reporting showed 1,820 tonnes CO2e reduction per year from grid electricity displacement.

    Questions to Ask Shortlisted Providers

    1. 1

      What is the current biogas yield per tonne VS destroyed and how does this compare to theoretical maximum for the sludge feedstock?

      A significant gap between actual and theoretical yield indicates inhibition (ammonia, VFA, sulphide) or incomplete hydrolysis; identifying the limiting step determines whether THP, co-digestion, or operational changes will unlock the most value.

    2. 2

      Is the digester operating at mesophilic or thermophilic temperature and what is the HRT?

      Thermophilic digestion (55 degrees C) achieves higher VS destruction and meets Enhanced Treated Sludge pathogen requirements but is more sensitive to process upsets; HRT below 15 days in mesophilic systems risks incomplete digestion and reduced biogas yield.

    3. 3

      What is the H2S concentration in the biogas and has siloxane removal been installed before the CHP engine?

      H2S above 100 ppm corrodes CHP engine components and requires iron sponge or biological desulphurisation; siloxanes above 1 mg/Nm3 Si form abrasive silicon dioxide in engine cylinders, reducing engine life to 30 to 50% of design.

    4. 4

      What is the secured biosolids end-use route and what are the gate fees or revenues for different routes?

      Whole-life economics of sludge-to-energy investment depend critically on whether biosolids can access agricultural land application (lowest cost) or must go to incineration/cement kiln (GBP 30 to 120 per tonne gate fee).

    5. 5

      What is the GGSS (Green Gas Support Scheme) eligibility for biomethane injection as an alternative to CHP?

      Ofgem GGSS pays a production tariff for biomethane injected to the gas grid; for sites close to a gas distribution network, biomethane injection may deliver greater revenue than CHP for the same biogas volume, depending on contract terms.

    What Drives Cost in This Category

    Thermal hydrolysis pre-treatment capital and operating cost

    Cambi THP systems for 5 to 20 tonnes DS/day cost GBP 3 to 8 million installed; operating costs include steam generation (from waste heat or gas boiler) at 700 to 900 kWh per tonne DS processed.

    CHP engine capital cost, efficiency, and maintenance

    Gas CHP engines (500 kW to 3 MW) cost GBP 800 to 1,500 per kWe installed; electrical efficiency ranges from 36% (older units) to 44% (Jenbacher J620); major overhaul at 40,000 hours costs GBP 150,000 to 400,000.

    Biogas cleaning (H2S removal and siloxane removal)

    Iron sponge H2S removal costs GBP 0.5 to 2 per 100 Nm3 biogas treated; activated carbon siloxane removal costs GBP 1 to 3 per 100 Nm3; together these protect CHP engine life and are essential capex for long-term CHP economics.

    Biosolids end-use route gate fees and transport

    Agricultural biosolids application costs GBP 20 to 60 per tonne DS including transport and spreading; cement kiln co-incineration costs GBP 30 to 80 per tonne dried; dedicated incineration costs GBP 60 to 120 per tonne wet cake at 25% DS.

    Key Regulations & Standards

    Environmental Permitting Regulations 2016 Schedule 13 (Waste Incineration)

    Sludge incineration plants must hold an EA Environmental Permit; continuous emission monitoring (CEM) required for NOx, CO, SO2, HCl, dust, and total organic carbon; IED ELVs must be met at all times; permit surrender requires site remediation.

    Green Gas Support Scheme (GGSS, Ofgem, 2021)

    Biomethane produced from anaerobic digestion of sewage sludge (eligible feedstock) qualifies for GGSS tariff payment on injection to the gas grid; tariff rates differentiated by technology type and volume; 15-year support period from registration date.

    Climate Change Levy (CCL) and Enhanced Capital Allowance (ECA)

    CHP plants certified under the CHPQA scheme attract CCL exemption on gas used in qualifying CHP; heat and electricity outputs must pass quality thresholds (QA, QE) for full CCL exemption benefit.

    Sludge (Use in Agriculture) Regulations 1989 and Safe Sludge Matrix

    Biosolids produced from thermal hydrolysis + digestion qualify as Enhanced Treated Sludge under the Safe Sludge Matrix; enables application on all agricultural crops except those eaten raw and uncooked; sludge analysis records must be retained for 10 years.