Infrastructure, Networks & Equipment

    Anaerobic Digestion Companies

    AD system providers, UASB, EGSB, CSTR, and plug-flow digesters for high-strength wastewater and organic waste.

    53 providers

    This page is a good fit if you need:

    • Anaerobic Systems or Conventional Activated Sludge (CAS) capabilities
    • Suppliers with food-beverage sector experience
    • Providers operating in United Kingdom or Netherlands
    Providers
    53
    Verified
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    Countries
    7

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    Showing 1-20 of 53

    53 results from 53 matched providers

    Ecosystems International logo

    Ecosystems International

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

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

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

    Brine Consulting

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

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

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

    Hangzhou Realize Technology Co., LTD.

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

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

    Process Water Treatment
    Wastewater Treatment
    Advanced Treatment Technologies
    +8 more
    manufacturing
    energy-production
    RCI Aquatech logo

    RCI Aquatech

    Verified
    India1-50 employees
    Mechanical Vapor Recompression (MVR) · Multiple Effect Evaporator (MEE) · Atmospheric Evaporator +76 more
    apac · europe · latam +1 more
    1 case studies

    Founded in 2009, formerly known as Red Circle Industries (RCI), RCI Aquatech creates custom wastewater solutions based on end users’ requirements, which allow for optimally chosen components resulting in a solution that meets or exceeds customer needs. RCI Aquatech’s wastewater treatment systems combine necessary process technologies to reach required state and federal discharge limits and comply with local regulations. Our systems focus on removal of pollutants such as heavy metals, greases, suspended solids, oils, high salt content, toxic compounds, phosphates and more. Using chemical-physical treatment (coagulation, flocculation, and sedimentation), biological treatment (aerobic and anaerobic) and wet chemical oxidation (persistent or toxic organics). Our expertise comprises the following technologies:  Filtration & softening systems  Physicochemical treatment (coagulation-flocculation)  Membrane filtration (UF & RO)  Ion exchange  Chemical oxidation  Biological treatment  Zero liquid discharge (ZLD) system

    Activated Carbon Filtration
    Microfiltration (MF) Systems
    Reverse Osmosis (RO) Systems
    +52 more
    manufacturing
    chemicals-pharmaceuticals
    Glanua Group logo

    Glanua Group

    United Kingdom

    Glanua is an industry leader in providing innovative and sustainable engineering solutions to design, build and operate critical water and wastewater infrastructure across Ireland and the UK. Glanua is passionate about solving today’s environmental challenges and delivering a decarbonised and sustainable world. At Glanua, we design, build, operate, and maintain innovative water and wastewater solutions that protect the environment and support the people who depend on them. Sustainability is at our core — it’s why we innovate, how we work and the future we’re building. We’re reimagining how the world treats water, using cutting-edge technology, smart design and fresh thinking to deliver cleaner, greener results for both industry and the public sector. With global ambitions and a track record of turning ideas into reality, we’re on an exciting journey of growth and impact. Glanua are a partner to major water utilities in Ireland and the UK, including Uisce Éireann (formally Irish Water), Thames Water, Yorkshire Water, Affinity Water and Northern Ireland Water. In the industrial sector, their clients include prominent names such as ABP, Glanbia, Kerry Group, and other key players in the food and beverage, pharmaceutical, and distillery industries. Core Values Glanua lives by our core values, including Safety and Well-being, Innovation, Integrity, Collaboration, Courage, Agility, Accountability, Diversity, and Inclusion. These values guide our actions and decisions, ensuring that we uphold the highest standards in everything we do. Our talented team comprises over 500 professionals across Ireland and the UK. Our UK office is headquartered in Hertfordshire and we also have offices in Reading, Sheffield, Northern Ireland, Galway and a manufacturing facility in Navan, Co Meath. Sustainability At Glanua, we understand the vital role we play in ensuring the delivery of safe and high-quality drinking water, as well as the proper treatment of wastewater before it is discharged into the environment. Committed to building today without compromising the environment for future generations, sustainability lies at the core of what we do. To strengthen our commitment, we have partnered with Earthshine, a leading sustainability consultant to develop our sustainability strategy that aligns with our values and ensures that every engineering solution we deliver contributes to a greener and more sustainable world. Future growth Glanua is on a growth trajectory, with ambitious plans to reach €400 million in the next five years. As we continue to expand our capabilities and service offerings, we remain committed to being at the forefront of sustainable engineering solutions, driving positive change in the water and wastewater infrastructure landscape in Ireland, UK, and internationally. Our growth is evident in the recent expansion of our team by over 150 people in 2023, bringing our total workforce to over 500 people. In 2024, we acquired O&M specialist company, Aqua Operations and in 2025, we acquired Anaerobic Digestion specialist company, Marches Biogas building a complete solutions provider in Water, Wastewater and Bioresources.

    Networks - Water Supply
    Contractors
    PNR ITALIA Srl logo

    PNR ITALIA Srl

    Verified
    Italy51-200 employees
    Spray Evaporator · Self-cleaning Screen Filters
    apac · europe · latam +2 more
    19 case studies

    We produce a comprehensive range of spraying solutions, encompassing everything from small-scale nozzles to large industrial spraying systems. Our diverse product line includes various types of nozzles tailored to meet the specific requirements of every application and customer need. The company was established in Milan in November 1968, focusing on distributing parts and components for fire protection systems. Over time, we expanded our offerings to include a diverse range of industrial sprayers tailored to various applications. In addition to our distribution and manufacturing of fire protection system components and industrial sprayers, we specialize in designing and producing pneumatic spray nozzles for industrial use and tank washing nozzles. Our product line also encompasses a variety of complementary accessories essential for industrial washing, including filters, spray guns, and hoses. Furthermore, we offer ejectors, blower nozzles, swivel joints, and hose clamps to provide comprehensive solutions for our customers' needs. PNR Italia is part of the Tecomec Group and oversees four other affiliated companies to form PNR Company, a consolidated reality with a significant presence on the market.

    Microfiltration (MF) Systems
    Disinfection Technologies
    Disinfection Chemicals
    +7 more
    agriculture
    manufacturing
    Active Tunnelling Ltd logo

    Active Tunnelling Ltd

    United Kingdom

    As an industry leader since 1994, Active Tunnelling Ltd (ATL) is the UK’s most experienced independent, micro-tunnelling, auger boring, shaft sinking and pipe jacking company offering a comprehensive range of services to the water and civil engineering industries across the UK & Ireland. More than just a tunnelling company ATL delivers all encompassing projects solutions: whether it is a segmental shaft or complete project management from ‘tunnel’ to final landscaping, ATL delivers flexible, and tailor made solutions to suit any brief. ATL prides itself on its long list of clients that includes amongst others the UK’s leading construction companies and is proud to claim total satisfaction on every job. A dedicated and highly skilled/experienced sixty strong team are at the core of ATL’s success, this weight of experience backed by the UK’s largest independent specialist plant enables ATL to deliver on time every time. Services Our comprehensive range of services allows us to satisfy even the most demanding brief, even with short lead times you can place your trust in us leaving you to focus on other aspects of the project. Tunnelling and pipejacking: 1,000mm – 2,400mm diameter. Micro-tunnelling: 150mm – 900mm diameter. Auger boring: 150mm – 725mm diameter. Grouting. Shaft sinking. Cover slab construction. Timber headings. ATL offer Professional management team with over 30 years experience. Quick mobilisation to site. Technical support/design where required. Achilles UVDB Verify approved company. Quality Assured ISO 9001:2008 Registered Firm Cert. No. A11969. Fast response to enquiries. Fast and efficient service maintaining a high standard of safety. Specialist trenchless plant. A completed project to a high quality at a reasonable price. A willingness to work as one team with all parties to ensure satisfaction.

    Networks - Water Supply
    Contractors
    Industrial Pipework Services logo

    Industrial Pipework Services

    United Kingdom

    At Industrial Pipework Services, we provide bespoke engineering services. With over 25 years’ experience IPS can offer complete mechanical engineering solutions including design, manufacture & installation services. Our experienced workforce are trained to the highest standards. IPS is situated within easy access to the M4 corridor approximately 30 minutes North of Cardiff. The company embraces innovative thinking while utilising the latest technology. IPS operating base comprises of 30,000 square foot of workshops, offices and assembly areas.  The Workshops are fully segregated for the manufacture of both carbon steel and stainless-steel products and are serviced by dedicated overhead gantry cranes. With over two decades of engineering experience the company strives to combine first class engineering and design to deliver the high quality that is required.  The Company maintains a proactive approach, working closely with our Clients to achieve our collective aims for each scheme. This ambition is underpinned by an uncompromising commitment to attain the highest standards of health, safety and environmental care. IPS provides continued excellence in design, manufacturing and installation gained from many years experience within the industry. Our In-House design capability allows the company to provide a full engineering design service using the latest Auto CAD software packages. IPS offers a design service for both pipework and steelwork systems from proposal drawings to the production of as built drawings. IPS Design Office provides all relevant AutoCAD drawings for steelwork and pipework, Isometric drawings for fabrication, general layout drawings for plant and equipment and As Built drawings. Structural steelwork calculations and flow characteristics are also provided as required. IPS offer a full 3D surveying services and production of cloud point data for project modelling. IPS operates primarily within the Water Industry and provides services for both clean water and sewage. IPS is a Tier One Mechanical Engineering Specialists Provider to Dŵr Cymru Welsh Water and the Strategic Alliance. IPS operate nationally and have delivered projects throughout the UK for many Water Utility companies including Anglian Water, Thames Water and Bristol Water. Continual improvement into our infrastructure and the development of new IT systems has brought us to a level consistent with the requirements of our clients. IPS offers a complete project management service, including operation of Principal Contractor role as well as delivering turnkey projects. Experience gained in the water industry has enabled us to manage the competing demands of cost, quality and safety for all our projects.

    Networks - Water Supply
    Contractors
    Intelect logo

    Intelect

    United Kingdom

    At Intelect, we have over 25 years experience in providing engineering expertise to clients in process industries. Intelect have worked with Northumbrian Water and its Tier 1 suppliers and partners for over a decade, and during this time, we have provided services in design, electrical installation, control panels and pipework services. Our attention to detail, quality, and attitude to Health and Safety has been consistently recognised by our clients over the years, with us receiving numerous awards for the projects we have completed. Our flexible workforce of apprentices, engineers and project managers allows us to efficiently complete any project to our client’s requirements. On-going innovation and investment in our business means that we have the latest training and technology to execute high quality engineering projects, from design through to commissioning, all whilst maintaining best practices in Health and Safety. Intelect are committed to working in partnership with both contractors and suppliers within the utility sector, sharing our expertise and knowledge to help support companies who provide utilities to homes and businesses across the North East and the rest of the country.

    Networks - Water Supply
    Contractors

    Biogas Recovery and Organic Stabilization Through Anaerobic Digestion of Wastewater

    Anaerobic digestion (AD) converts organic matter in wastewater and sludge into biogas (typically 60–70% methane) and stabilized biosolids through a cascade of microbial processes: hydrolysis, acidogenesis, acetogenesis, and methanogenesis. Upflow anaerobic sludge blanket (UASB) reactors are the dominant high-rate AD technology for industrial and municipal wastewater treatment, operating at hydraulic retention times (HRT) of 4–8 hours versus 20–30 days for conventional digesters. Expanded granular sludge bed (EGSB) and internal circulation (IC) reactors further improve volumetric loading rates for high-strength industrial effluents.

    Biogas energy recovery is central to the economic case for AD at scale. A 10,000 m³/day municipal WWTP with co-digestion of food waste can generate 2,000–4,000 Nm³/day of biogas, sufficient to cover 50–100% of plant energy demand when converted to electricity and heat via combined heat and power (CHP) systems. Biogas upgrading to biomethane (greater than 97% CH₄) using pressure swing adsorption (PSA), water scrubbing, or membrane separation enables grid injection or compressed natural gas vehicle fuel use—both of which can generate renewable energy certificates with additional revenue value.

    Digestate and biosolids management downstream of anaerobic digesters requires careful planning. Anaerobically digested biosolids can meet Class B or Class A (EQ) pathogen reduction standards under EPA 40 CFR Part 503 depending on digester operating temperature and retention time, with Class A biosolids commanding the highest reuse value for land application. The digestate liquid fraction (centrate or filtrate from dewatering) is high in ammonium and phosphate and must be managed to avoid short-circuiting the plant's nutrient removal system—struvite precipitation or air stripping are options for high-strength centrate.

    Frequently Asked Questions

    What is a UASB reactor and what wastewater types is it suited for?

    A UASB (Upflow Anaerobic Sludge Blanket) reactor treats wastewater by flowing it upward through a dense bed of anaerobic granular sludge, achieving high organic removal rates in compact footprints without mechanical mixing. UASB reactors are best suited for soluble, biodegradable wastewater with COD above 1,000 mg/L—brewery, dairy, food processing, paper mill, and sugar refinery effluents are classic applications. They are not appropriate for high-solids or inhibitory wastewaters (high oil, sulfide, or heavy metals) without pre-treatment, as these materials disrupt granule structure and methanogenic activity.

    How much biogas can I expect from anaerobic digestion of wastewater sludge?

    Typical biogas yield from primary sludge is 400–500 L/kg VS destroyed; from waste activated sludge (WAS), 250–350 L/kg VS destroyed, with blended sludge digestion yielding around 350–450 L/kg VS destroyed depending on volatile solids content and feed consistency. At 65% methane content, each Nm³ of biogas contains approximately 6.5 kWh of energy. A 100,000-population-equivalent municipal WWTP digesting blended sludge can expect 2,000–4,000 Nm³/day of biogas under normal operating conditions, subject to feed quality and digester temperature control.

    What are the main causes of anaerobic digester upsets and how are they prevented?

    The most common causes of digester upset are organic overloading (which drives volatile fatty acid accumulation and pH drop), inhibitory compounds (ammonia above 3,000 mg/L, sulfide above 200 mg/L free H₂S, or heavy metals), and temperature fluctuations that disrupt methanogenic microbial activity. Prevention relies on COD loading rate monitoring, regular VFA-to-alkalinity ratio testing (target below 0.3–0.4 for stability), and controlled feed increases when introducing new waste streams. Maintaining mesophilic digestion temperature at 35–37°C within ±1°C is critical—rapid temperature swings have more impact on methanogens than sustained steady-state variation.

    What are the regulatory requirements for biosolids land application from anaerobic digestion?

    In England and Wales, biosolids produced by anaerobic digestion must meet the requirements of the Safe Sludge Matrix (developed by Water UK and the Agriculture and Horticulture Development Board) for safe use on agricultural land. The matrix specifies digestion and pathogen reduction treatment requirements for different crop types and application timings. Thermophilic digestion (above 55 degrees C) achieves the higher pathogen reduction standard required for unrestricted application to crops grown for direct human consumption. The biosolids must also comply with the Biosolids (Use in Agriculture) Regulations 1989 (as amended) for heavy metals and nitrogen loading limits.

    Case Study·Food and drink processing cooperative, West Yorkshire, UK
    Challenge

    A cooperative processing approximately 800 m3/day of high-strength effluent (COD 6,000 to 12,000 mg/L) from dairy and brewery operations was spending GBP 400,000 per year on mains electricity to aerate an activated sludge plant that was barely meeting its EA permit BOD limit. The site had no energy recovery from its organic waste.

    Approach

    A high-rate UASB anaerobic digestion system was installed ahead of the existing aerobic polishing stage. The UASB was sized for 80% COD removal at a volumetric loading rate of 8 kg COD/m3/day. Biogas produced was captured and fed to a 120 kW CHP unit supplying electrical and thermal energy to the site.

    Outcome

    Aerobic aeration energy demand fell by 75% as COD load to the aerobic stage dropped from 6,000 to under 1,200 mg/L. The CHP unit generated approximately 650 MWh of electricity per year, offsetting GBP 130,000 of annual energy spend. Overall treatment operating costs fell by 58% in the first full operating year.

    Questions to Ask Shortlisted Providers

    1. 1

      What volumetric COD loading rate is the anaerobic system designed for, and what is the minimum COD concentration in the feed at which granule stability can be maintained?

      Granule stability in UASB and EGSB reactors is concentration-dependent; low COD feed or dilute process streams may not sustain stable anaerobic performance.

    2. 2

      What biogas yield (Nm3 per kg COD removed) do you guarantee, and how is this validated in the commissioning protocol?

      Biogas yield directly determines the energy offset value from the project; an unguaranteed yield leaves the commercial case for the investment unvalidated.

    3. 3

      How does the system manage inhibitory compounds such as high sulphate, ammonia, or heavy metals that may be present in our effluent?

      Inhibitory compounds are the most common cause of anaerobic digestion performance failure and must be assessed against site-specific effluent characterisation data.

    4. 4

      What biogas conditioning and safety systems are included, and is the system designed to ATEX Zone 1 or Zone 2 explosive atmosphere classification?

      Biogas handling areas are explosive atmospheres requiring ATEX-compliant equipment; this classification must be confirmed before specifying instruments, electrical systems, and maintenance procedures.

    5. 5

      What happens to digestate and effluent from the anaerobic stage, and does the downstream polishing treatment maintain compliance with EA consent limits even when the anaerobic stage is offline for maintenance?

      Anaerobic systems require periodic maintenance windows; the downstream treatment chain must be able to handle the full raw effluent load without permit breaches during these periods.

    What Drives Cost in This Category

    Reactor volume and organic loading rate

    Higher volumetric loading rates reduce reactor volume and capital cost but require stable granular sludge and controlled feedwater composition; lower loading rates increase vessel size and civil cost.

    Biogas utilisation infrastructure

    CHP unit, gas conditioning (desulphurisation, moisture removal), and grid connection or gas storage equipment can represent 30 to 50% of total project capital cost but drive the energy offset revenue.

    Effluent COD concentration and consistency

    Highly variable COD feed requires equalization capacity upstream of the anaerobic stage; equalization tankage adds civil cost but protects anaerobic performance and biogas yield consistency.

    Digestate management

    If digestate cannot be land-spread under agricultural reuse regulations, dewatering and off-site disposal costs can significantly erode the economic case for the anaerobic investment.

    Key Regulations & Standards

    Environmental Permitting Regulations 2016

    Waste management activities including anaerobic digestion of industrial effluent may require an Environmental Permit covering waste inputs, biogas management, and digestate disposal.

    Biogas Safety Management System (DSEAR 2002)

    Dangerous Substances and Explosive Atmospheres Regulations require ATEX zone classification and risk assessment for all biogas handling areas including reactor headspace, gas storage, and CHP plant.

    Biosolids (Use in Agriculture) Regulations 1989

    Governs the land application of digestate and biosolids, including heavy metal loading limits and treatment requirements for pathogen reduction on different crop types.

    EA Guidance on Biogas and Biomethane

    Sets out the regulatory requirements for biogas flaring, CHP combustion, and grid injection of biomethane, including permitted development rights and permit exemptions for small installations.