What CSO Group Ltd does

CSO Group Ltd is a privately owned UK-based limited company (registered in England & Wales, No. 11259688, headquartered at Chequers Barn, Bough Beech, Edenbridge, Kent TN8 7PD) that designs, manufactures, and supplies environmental pollution control equipment for the Energy from Waste, Waste Water Treatment, Municipal Solids Waste, and General Industrial sectors. The company operates with 1-10 employees and runs a 3D BIM design facility using the Autodesk suite to support enterprise sales and project specification. Its core proprietary technology, Terminodour™, is a low-voltage oxidation and ionisation system for odour abatement that has been granted Best Available Technology (BAT) status under the European Commission's BREF documentation for Waste and Waste Water industries. CSO also distributes complementary world-class equipment through principal partnerships, including Lackeby Products (Swedish heat exchangers, Roto-Sieve® drum screens, floating decanters, and solids handling equipment), Weber Kunststofftechnik (German thermoplastic tanks), and Fluiteco (sludge screw presses), creating an integrated portfolio spanning odour control, biogas desulphurisation, fine and storm screening, flow regulation, heat exchange, tank flushing, pasteurisation, and chemical handling.

The company's revenue model combines bespoke equipment manufacturing (design, manufacture, supply, install, commission), engineering project services (turnkey delivery with civil, mechanical, electrical, and instrumentation scope), and distribution margins on partner products. Go-to-market is anchored on direct enterprise sales to major UK water utilities (Severn Trent Water, United Utilities, Dwr Cymru Welsh Water, Scottish Water, Northern Ireland Water, Irish Water) and large industrial accounts (ReFood/SARIA Group, Biffa, ABP Food Group, EMR), with a documented international distributor network covering ASEAN, Canada, Denmark, Germany, New Zealand, Spain, Sweden, and the USA. Marketing relies on industry trade shows (Water Equipment Show 2025, ADBA Expo 2025), a sector-organised website, an active LinkedIn presence, and an extensive case study library. The company holds ISO 9001, ISO 14001, ISO 45001, CHAS Accredited Contractor, and Cyber Essentials certifications, with named single-project contract values reaching £1.8m (Scottish Water Kirkcaldy WWTW).

The business originated in 2018 manufacturing and distributing Combined Storm Overflow equipment and odour control systems for the UK wastewater sector, then expanded sector-by-sector into Energy from Waste, Municipal Solids Waste, and General Industrials, and extended internationally via partner companies with completed projects in North America, Continental Europe, and the Middle East. CSO's stated mission is "Protecting the world's rivers, oceans and the air we share, for our generation and those that will follow." No revenue, funding, ownership, or management team information is publicly disclosed.

Name

CSO Group Ltd

Legal name

CSO Group Ltd

Website

https://csogroup.co.uk

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

1–10 employees

Short description

CSO Group Ltd is a privately owned UK manufacturer and distributor of pollution control equipment for Energy from Waste, Waste Water Treatment, Municipal Solids Waste, and industrial sectors, combining proprietary BAT-certified technologies such as Terminodour™ with UK and Ireland distribution of Lackeby and Weber Kunststofftechnik products.

Ownership category

akta.pro rank

Product category

Environmental Pollution Control Equipment

NAICS

Commercial and Service Industry Machinery Manufacturing (333310), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Misc Industrial & Commercial Machinery & Equipment (3590), Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564), General Industrial Machinery & Equipment (3560)

akta.pro primary industry

Industrial Waste Handling & Compaction Equipment (Balers, Compactors) (IMAHALAI)

akta.pro secondary industries

Chemical Tank Cleaning, Decontamination & Turnaround Waste Services (BPALAHAH), Chemical Processing Equipment (Reactors, Mixers, Agitators) (IMAHAEAA)

Keywords

• Pollution control equipment
• Odour abatement systems
• Wastewater treatment equipment
• Biogas desulphurisation
• Anaerobic digestion equipment

Headquarters

HQ city

Edenbridge

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Supply Chain, Marketing or Sales, Infrastructure

Revenue model

1. Equipment Manufacturing & Supply: CSO Group manufactures equipment including biogas desulphurisation systems, odour control systems (Terminodour™, Kombi-Skrub range), pasteurisation systems, heat exchangers, screens, solids handling equipment, flow regulators, chemical storage and handling systems, tank flushing systems, floating decanters, storage tanks, and bending weirs. Equipment is sold as bespoke systems designed, manufactured, supplied, installed and commissioned for specific client applications.
2. Engineering Design & Project Services: CSO Group provides turnkey engineering solutions including design, manufacture, supply, installation, testing and commissioning of complete systems. Projects include full scope works with civil, mechanical, electrical and instrumentation components. Revenue is generated through project contracts with utilities and industrial clients.
3. Distribution of Partner Products: CSO Group distributes complementary products and services from its partners including Lackeby (Sweden - heat exchangers, screens, solids handling), Weber Kunststofftechnik (Germany - storage tanks), and Fluiteco (depackaging systems, sludge screw presses). Revenue is generated through product distribution margins.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

CSO Group designs, manufactures, supplies, installs and commissions environmental pollution control equipment for the Energy from Waste, Waste Water Treatment, Municipal Solids Waste, and General Industrial sectors. Core equipment categories include tank flushing systems, odour abatement systems (Terminodour™, Phot-OX, Kombi-Skrub range), biogas desulphurisation systems, drum and storm screens, heat exchangers, flow regulators, chemical storage and dosing systems, solids handling equipment, storage tanks, floating decanters, pasteurisation systems, and bending weirs. The company also distributes complementary products from its principal partners Lackeby (Sweden), Weber Kunststofftechnik (Germany), Fluiteco, and BGU Umweltschutzanlagen (Germany).

Product overview

CSO Group Ltd is a privately owned UK company providing environmental pollution solutions for Energy from Waste, Waste Water Treatment, Municipal Solids Waste, and General Industrial sectors. The product portfolio consists of multiple distinct equipment categories that work together to provide comprehensive treatment solutions: Tank Flushing Systems (VacFlush™, Tipping Buckets, Flushing Gates, Flushing Drums, Pivoting Jet Cleaners) for automated tank and sewer cleaning; Odour Control solutions including Terminodour™ (BAT-certified ionisation system), Photo-Oxidation (UV-C VOC destruction), and Kombi-Skrub systems (BiOC biological, Ammonia Scrubbers, Bio Trickling Filters, Catalytic Iron Filters, Dry Chemical Scrubbers, Wet Chemical Scrubbers); Biogas Desulphurisation (Biological, Adsorption, Chemical); Heat Exchangers (Sludge/Water, Sludge/Sludge, Air/Water); Screens (Pump Action Screen for CSOs, Static Wave Screen for CSOs, Lackeby Roto-Sieve® Drum Screen, Lackeby Roto-Sieve® Septic Unit); Flow Regulators (Balance, Compact, Jet); Chemical Storage, Dosing & Handling Systems; Solids Handling equipment (Lackeby Shaftless Screw Conveyors, Shaftless Screw Press, Piston Press, Receiving Units, Fluiteco Sludge Screw Press); Storage Tanks (Weber Kunststofftechnik products); Lackeby Floating Decanter; Pasteurisation (3VP system); Bending Weir; and Viroxx UV-C air purification systems. The company also distributes products from principals including Lackeby Products (heat exchangers, screens, solids handling), Weber Kunststofftechnik (tanks), and BGU Umweltschutzanlagen.

Differentiator

Problem solved

Functional benefit

Products and services

• VacFlush™ Tank Flushing System Vacuum flushing system for cleaning tank floors and sewers without hazardous man entry. Suitable for circular tanks up to 65m diameter, rectangular tanks up to 150m length, and sewer networks up to 250m in length. Designed for water utilities and industrial operators.
• Tipping Buckets Simple, cost-effective system for cleaning storm water storage tanks. Easily retrofitted into existing tanks with stainless steel construction. Designed for water utilities.
• Flushing Gates Low-cost solution for cleaning storm water storage tanks and sewer networks up to 150m in length, using storm water as the flushing media. Designed for water utilities.
• Flushing Drums Automatic cleaning device for storm water storage tanks and channels using combined storm water, with no external energy supply required. Designed for water utilities.
• Pivoting Jet Cleaners Cost-effective means of cleaning storm water storage tanks, reaching all floor areas during tank emptying periods. Designed for water utilities.
• Terminodour™ Odour Abatement System Proprietary low-voltage oxidation and ionisation system for odour abatement. Uses ionised air to eliminate odours within structures, ensuring compliant discharge to atmosphere with superior indoor air quality, reduced corrosion, and safer working environments. Granted BAT status in BREF documentation for Waste and Waste Water industries. No water or chemicals required for operation. Designed for water utilities, AD/biogas plants, and municipal solid waste transfer stations.
• Phot-OX Photo-Oxidation System UV-C based technology for destroying Volatile Organic Compounds (VOCs) and other organic and inorganic odours in waste air streams. UV lamps create ozone that oxidises contaminants, which then pass through a catalytic module completing the reaction and converting unreacted ozone back to oxygen. Granted BAT status in BREF documentation. Designed for industrial and waste processing operators.
• Kombi-Skrub BiOC Biological Desulphurisation System Biological desulphurisation system using naturally existing sulphur bacteria to reduce H2S from exhaust gases, producing sulphuric acid usable as fertiliser. Designed for AD/biogas plant operators and industrial processes.
• Kombi-Skrub Ammonia Scrubbers Highly effective system for removing ammonia from gas streams to protect downstream plant equipment. Designed for AD/biogas plants and industrial processes.
• Kombi-Skrub Bio Trickling Filters (BTF) Bio trickling filter providing ideal conditions for sulphur reducing bacteria to thrive, achieving 90–99% H2S removal using counter-current air and water contact. Designed for AD/biogas plants and wastewater treatment operators.
• Kombi-Skrub Catalytic Iron Filters (CIF) Roughing filter for removal of high H2S loads, protecting and extending the life of downstream polishing media with up to 80% H2S removal. Designed for AD/biogas plants and wastewater treatment operators.
• Kombi-Skrub Dry Chemical Scrubbers Dry media bed system using powerful oxidising agents to change the chemical structure of odourous compounds, with modular design and low pressure loss. Designed for AD/biogas plants and wastewater treatment operators.
• Kombi-Skrub Wet Chemical Scrubbers Effective abatement system for high air volumes with high or variable odour challenges, with 2 or 3 chemical stages achieving >99% H2S abatement. Designed for AD/biogas plants and wastewater treatment operators.
• Biological Desulphurisation System Biological system using naturally existing sulphur bacteria to reduce H2S from gases, producing sulphuric acid or elemental sulphur as usable fertilisers with up to 99% H2S removal. Designed for AD/biogas operators.
• Adsorption Desulphurisation System Adsorptive filter system for H2S removal at low to medium sulphur loads, operating in duty-standby configuration for continuous operation. Designed for AD/biogas operators.
• Chemical Desulphurisation System Skid-mounted 3-stage system converting H2S into water and elemental sulphur using iron-based particles, with minimal reagent and water consumption. Designed for AD/biogas operators.
• Lackeby Heat Exchangers Air/water, sludge/water, and sludge/sludge heat exchangers with compact and efficient designs for aeration system heat recovery and sludge processing. Designed for AD/biogas plant operators and wastewater treatment works.
• Pump Action Screen for Combined Sewer Overflows Mechanical screening system for storm water applications, retaining gross solids larger than 6mm in two directions with up to 1,766 l/s capacity per screen. Designed for water utilities operating combined sewer overflows.
• Static Wave Screen for Combined Sewer Overflows Non-powered screening solution for storm water applications with 55% Solids Retention Value (SRV), retaining all solids greater than 6mm. Designed for water utilities operating combined sewer overflows.
• Lackeby Roto-Sieve® Drum Screen Patented drum screen with proven track record for screening flows prior to membrane filtration or MBRs. Capable of screening down to 0.6 mm with no chance of bypassing due to enclosed design. Model capacities range from 1 l/s up to 435 l/s. Over 4,500 units installed globally. Designed for wastewater treatment operators and industrial process water applications.
• Lackeby Roto-Sieve® Septic Unit Septic sludge receiver with integrated screw press for rapid separation of unwanted fibrous materials from tanker discharges. Features automatic flow control, internal feeding of septic sludge into the drum with variable diameter perforations, and over 20-year design life. Designed for wastewater treatment operators receiving septic sludge tankers.
• Balance Flow Regulator Maintains constant discharge through automatic opening to match upstream water level, suitable for very low flow regulation from 1 l/s to max 250 l/s. Designed for water utilities managing combined sewer networks.
• Compact Flow Regulator High-accuracy flow regulator with automatic self-flushing effect to prevent blockage, suitable for combined sewer flows from 15 l/s to max 450 l/s. Designed for water utilities managing combined sewer networks.
• Jet Flow Regulator Balances the force of water flowing through against the jet shield for constant discharge, with accuracy of ±5% and flow regulation from 2 l/s to max 200 l/s. Designed for water utilities managing combined sewer networks.
• Chemical Storage, Dosing & Handling Systems Complete range including circular storage tanks, chemical dosing systems, filling and siphoning systems, filling stations, and IBC reception stations. Designed for industrial and municipal operators requiring chemical storage and dosing.
• Lackeby Shaftless Screw Conveyors Efficient transport of solids with shaftless spiral design suitable for materials that tangle or stick, available in vertical and horizontal configurations. Designed for wastewater and AD/biogas operators.
• Lackeby Shaftless Screw Press Heavy-duty dewatering press based on shaftless screw conveyor technology, designed for efficient dewatering with easy maintenance and minimal clogging risk. Designed for wastewater and AD/biogas operators.
• Lackeby Piston Press Combines quality dewatering capacity of a screw press with the capability of a hydraulic press to lift and transport dewatered material. Designed for wastewater and AD/biogas operators.
• Lackeby Receiving Units Units for receiving, homogenising and transporting waste material, designed for rapid unloading to optimise site efficiency and reduce odours. Designed for AD/biogas plants and waste reception facilities.
• Fluiteco Sludge Screw Press Liquid solid separation system using screw compression to dewater sludges to up to 25% dry solids, with 5 model sizes handling flows from 1.1 to 21 m³/hr. Designed for wastewater and AD/biogas operators.
• Weber Kunststofftechnik Storage Tanks UK and Republic of Ireland distribution of Weber Kunststofftechnik thermoplastic tanks including circular tanks, rectangular tanks, and customised tanks in various materials, plus filling stations and IBC reception stations. Designed for industrial and municipal chemical storage.
• Lackeby Floating Decanter Gravity-based decanter developed for Sequencing Batch Reactor (SBR) plants. Decanting pipe floats on the water surface with the help of floating pontoons and has evenly distributed decanting holes for even flow. Features patented automatic closing function based on gravitation and differential pressure that prevents sludge from entering the decanting pipe during aeration and agitation. Designed for municipal wastewater treatment operators running SBR plants.
• CSO 3VP Pasteurisation System CSO '3VP' turn-key pasteurisation system using three vessels with rotating cascade principle, maintaining 70°C for one hour to comply with PAS110 and ABP regulations. Designed for AD/biogas operators producing biofertiliser.
• Bending Weir Storm water storage capacity enhancement system that increases hydraulic capacity by up to 0.9 m³ per square metre without major civil works. Designed for water utilities seeking to upgrade storm storage performance.
• Viroxx UV-C Air Disinfection System UV-C light-based decontamination system proven to destroy viruses including coronavirus within a minute, suitable for room volumes up to 150 m³ as a mobile unit, or for larger applications built into existing ventilation systems or provided as part of a completely new ventilation system. Designed for indoor air quality applications in public and commercial buildings.

Quantifiable outcome

• H2S reduction of 92.5% internally and 99% externally demonstrated at Swansea Bay WWTW using Terminodour™
• +6 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Eleven partnerships are on record, tiered minor, core and principal.

• Purac ABminorStrategic or Co-development Partner · 1 January 2015Purac AB was appointed as the general contractor for the Grødaland biogas plant pre-treatment plant project in Norway where CSO Group (via Lackeby) supplied receiving units and shaftless screw conveyors. Project completed 2016 with 53,400 TPA capacity.
• Eco-Solution (S) Pte LtdcoreChannel Partner/ Reseller/ DistributorEco-Solution is CSO Group's distributor for ASEAN region covering Terminodour, Photo-Oxidation, and Bio Trickling Filter (BTF) products. Contact: [email protected].
• KusterscoreChannel Partner/ Reseller/ DistributorKusters is CSO Group's distributor for Canada covering all products. Contact: [email protected] / www.zimacorp.com/water/.
• KrugercoreChannel Partner/ Reseller/ DistributorKruger is CSO Group's distributor for Denmark covering Combined Storm Overflow equipment. Contact: [email protected] / www.kruger.dk/en.
• BGU - Umweltschutzanlagen GmbHprincipalOEM/ Whitelabel/ Licensing PartnerBGU is a principal partner for Germany. Umweltschutzanlagen GmbH is an environmental technology company. Contact: [email protected] / www.bgu-online.de.
• Brown Brothers Engineers LtdcoreChannel Partner/ Reseller/ DistributorBrown Brothers Engineers Ltd is CSO Group's distributor for New Zealand covering Pump Action Screen and Vacuum Flushing System products. Contact: [email protected] / brownbros.co.nz.
• HidrostankcoreChannel Partner/ Reseller/ DistributorHidrostank is CSO Group's distributor for Spain. Contact: [email protected] / www.hidrostank.com/hidrostank/.
• Lackeby ProductsprincipalOEM/ Whitelabel/ Licensing PartnerLackeby Products is CSO Group's Swedish principal partner for Heat Exchangers, Screens, and Solids Handling equipment. Over 50 years of experience in designing and manufacturing the Roto-Sieve® drum screen with over 4,500 units sold globally. Contact: [email protected] / www.lackebyproducts.com/.
• Weber KunststofftechnikcoreOEM/ Whitelabel/ Licensing PartnerCSO Group is the UK and Republic of Ireland distributor for Weber Kunststofftechnik, one of the largest manufacturers of thermoplastic tanks and accessories in Europe. Products include circular tanks, rectangular tanks, customised tanks, filling stations, and IBC reception stations.
• FluitecocoreOEM/ Whitelabel/ Licensing PartnerFluiteco supplies the Opera Depackaging System and Sludge Screw Press product range distributed by CSO Group. The Fluiteco SD screw press dewaters sludges to up to 25% dry solids using 5 model sizes handling flows from 1.1 to 21 m³/hr.
• Greenlane BiogascoreImplementation/ SI/ Consulting PartnerGreenlane Biogas has partnered with CSO Group on multiple ReFood AD facility projects, providing biogas upgrading plant including the odour control package. CSO Group supplied biogas desulphurisation and odour control equipment for Dagenham facility. Projects include Dagenham (completed Spring 2017) with Kombi-Skrub BiOC biological trickling filter.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Sidem: French specialist in odour treatment and air purification for wastewater and industrial sites — directly competes with CSO's Terminodour™, Phot-OX, and Kombi-Skrub product ranges across European municipal and industrial customers.
• Hydro International: UK-based water treatment technology company specialising in stormwater management, CSO screening, and wastewater treatment — directly competes with CSO's Pump Action Screen and Static Wave Screen for combined sewer overflow applications in the UK and Ireland.
• Jacopa: UK-based wastewater equipment manufacturer and supplier specialising in screening, grit removal, and CSO screens for the UK water industry — direct competitor serving the same Severn Trent, United Utilities, and Welsh Water customer base.
• HUBER Technology: German-headquartered manufacturer of wastewater and sludge treatment equipment including screens, grit removal systems, and sludge dewatering — directly competes with CSO on Lackeby Roto-Sieve® drum screens, screw presses, and screening solutions for municipal WWTPs.
• Nijhuis Industries: Dutch water and wastewater treatment solutions provider offering screens, sludge handling, and process equipment for municipal and industrial clients — comparable product portfolio to CSO's screening and solids handling lines across European markets.
• Biothane Systems International: Dutch designer and manufacturer of anaerobic treatment and biogas systems for industrial wastewater — direct comparable to CSO's EfW/biogas customer work (Biothane is also a CSO customer at the Burton on Trent Marmite site) with overlapping AD/biogas customer base.

Regional players

• WPL Limited: UK manufacturer of packaged and modular wastewater treatment plants for municipal and industrial applications — serves the same UK water utility market as CSO with overlapping customer relationships, though focused on biological treatment rather than screens/odour control.

Broad incumbents

• Xylem Inc. Global water technology company (including Wedeco, Flygt, Leopold, Evoqua brands) offering pumps, treatment systems, and instrumentation for water and wastewater utilities — broad incumbent competing for many of the same UK water company framework contracts as CSO.
• Veolia Water Technologies: Global water and wastewater treatment technology and services provider with broad portfolio including odour control, screening, and biological treatment — competes with CSO across municipal and industrial sectors but as part of a much larger integrated offering.

Emerging players

• BioGill: Australia-based biological wastewater treatment company using biofilm-based systems for industrial and municipal applications — emerging player in biological treatment technologies that intersects with CSO's Kombi-Skrub BiOC biological desulphurisation offering in the AD/biogas space.

Market position

Strengths2 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/csogroup

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CSO Group Ltd