Exeon's hi-flo™ is a high-capacity chemical scrubber system designed to remove odours, corrosive gases and harmful air emissions from industrial, wastewater and waste treatment processes.
Suitable for applications with higher airflow requirements, the system provides reliable treatment of contaminants such as hydrogen sulphide (H₂S), ammonia, mercaptans and other odorous or hazardous compounds.
Manufactured using durable, corrosion-resistant materials, the hi-flo™ system is designed for long-term performance in demanding industrial environments.
Its modular design allows the system to be tailored to individual site requirements while providing efficient odour control, air pollution reduction and environmental compliance.
By combining advanced gas scrubbing technology with automated chemical dosing and process monitoring, the hi-flo™ delivers consistent treatment performance while minimising maintenance requirements and operating costs.
Exeon’s Range of hi-flo™ Odour and Pollution control units are a containerized deep-bed odour adsorption system. The hi-flo™ range use a single or twin vertical deep bed of activated carbon, of a type suitably selected for the application, to provide emission control of non-compliant discharges, with correct prefiltration as required to maximise carbon life.
These systems are suitable for high airflows for a wide range of high concentration applications, including: Ventilation for factories with high levels of odour Waste Transfer Facilities and RDF plants Anaerobic digestion plants Typically these can be used on existing or proposed process discharges requiring Odour & emission control. Airflow levels: 5,000m3/hr – 100,000m3/hr +. Up to 80,000m3/hr per module, and multiple modules can be provided – so there is no upper limit on airflow.
The Activated carbon is carefully selected to ensure optimum life and Odour / emission control. Exeon can also design, supply and install dust pre-filtration units to remove high levels of dust and maximise the life of the Activated carbon.
Activated carbon filtration systems remove gaseous pollutants, odours and airborne contaminants by passing extracted air through specially selected carbon media. The activated carbon adsorbs pollutants onto its surface, helping to reduce emissions before clean air is discharged back into the atmosphere. Carbon adsorption systems are commonly used where biological treatment alone is insufficient or where final-stage polishing is required to achieve environmental compliance.
Typical contaminants removed include: Hydrogen sulphide (H₂S), Ammonia (NH₃), Volatile organic compounds (VOCs), Mercaptans Industrial odour compounds
Using extraction fans, contaminated air is drawn from the building or process area into the activated carbon filtration system. This air stream may contain odorous compounds such as hydrogen sulphide (H₂S), ammonia (NH₃), volatile organic compounds (VOCs) and other industrial emissions commonly found in wastewater treatment, waste handling and industrial processing facilities.
The air first passes through a high-capacity dust filtration stage designed to remove airborne particulates and protect the activated carbon media. Each dust filter is individually sealed and can be easily accessed for inspection and maintenance.
Following pre-filtration, the air is evenly distributed throughout the activated carbon bed. The system's engineered airflow and controlled pressure ensure maximum contact time between the contaminated air and the activated carbon media. During this carbon adsorption process, odorous gases and airborne pollutants are captured and removed from the air stream.
Once the air has passed through the activated carbon filtration stage, clean treated air is extracted by centrifugal fans and discharged safely through the exhaust stack. This process delivers effective odour control, hydrogen sulphide removal, ammonia treatment and VOC reduction, helping businesses improve air quality and meet environmental compliance requirements.
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hi-flo™ Model*
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Airflow Max. – m3/hr
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Length (mm)
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Width (mm)
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Height (mm)
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Capacity (m3)
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|---|---|---|---|---|---|
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H6
|
6000
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4000
|
2438
|
2896
|
6.5
|
|
H12
|
12,000
|
6100
|
2438
|
2896
|
13.4
|
|
H20
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20,000
|
9100
|
2438
|
2896
|
23
|
|
H30
|
30,000
|
12200
|
2438
|
2896
|
32.6
|
|
H36
|
36,000
|
12200
|
2438
|
2896
|
40.3
|
|
C range **
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1-4000
|
-
|
-
|
-
|
-
|
*Hi-Flo carbon filters are used in parallel for higher flows. These can be stacked if required for plant space. Please contact us for more information / sizes to suit application.
Should a post-scrubber carbon filter system be required, these have slightly varying airflows, these can be confirmed on application.
**Smaller cylindrical PP vessels for lower flows
Activated carbon odour control is a method of removing odorous gases and airborne pollutants from contaminated process air.
The system works by passing extracted air through a bed of specially selected activated carbon. Pollutant molecules attach themselves to the large internal surface area of the carbon through a process known as adsorption.
Activated carbon systems can treat hydrogen sulphide, ammonia, mercaptans, volatile organic compounds and a wide range of industrial odours.
They are commonly used where reliable emission control is required, including wastewater treatment, waste processing, anaerobic digestion and industrial manufacturing facilities.
Exeon’s hi-flo™ system uses a deep bed of activated carbon to provide effective treatment for high-airflow and high-concentration applications. Learn more about activated carbon odour control.
The hi-flo™ system draws contaminated air away from a building, vessel or process area using extraction fans.
Before reaching the activated carbon, the air can pass through a dust filtration stage. This removes airborne particles that could restrict airflow, contaminate the carbon bed or reduce the working life of the media.
The filtered air is then distributed evenly through a deep bed of activated carbon. Odorous gases and pollutants are adsorbed onto the surface of the carbon while the treated air continues through the system.
Once treatment is complete, the cleaned air is discharged safely through an exhaust stack.
Carefully controlled airflow and contact time help the system achieve consistent odour and emission removal. Understand more about how activated carbon systems work.
Activated carbon systems can remove many gaseous pollutants, odours and airborne chemical compounds from industrial process air.
Common contaminants include hydrogen sulphide, ammonia, mercaptans and certain volatile organic compounds. Activated carbon may also be used to treat solvent vapours, organic odours and other pollutants produced by wastewater, waste handling and manufacturing processes.
The effectiveness of the system depends on the type of contaminant, its concentration, the airflow rate and the carbon media selected.
Different activated carbons have different adsorption properties. The carbon must therefore be chosen according to the composition of the air stream and the required treatment performance.
Air sampling and process information can help determine which media is most appropriate. Learn more about the pollutants that activated carbon can remove.
Activated carbon odour control is used across industries that generate unpleasant, corrosive or potentially harmful air emissions.
Common applications include wastewater treatment works, sewage facilities, waste transfer stations, refuse-derived fuel plants, anaerobic digestion facilities and composting operations.
Activated carbon systems are also used within food production, abattoirs, chemical processing, manufacturing plants and other industrial environments where process emissions require treatment.
The technology is particularly useful where odour concentrations are high, airflow volumes are significant or the emissions vary during production.
Exeon’s modular hi-flo™ range can be adapted around the airflow, contaminants, available space and operating requirements of each site. Find out more about the different industries that use activated carbon odour control.
The hi-flo™ system is designed for industrial applications involving large volumes of contaminated air.
Individual units are available for a range of airflow requirements, while multiple modules can be installed in parallel to treat substantially higher volumes. This allows the system to support both medium-sized processes and large industrial ventilation systems.
The required capacity will depend on the amount of air being extracted, the contaminant concentration and the contact time needed within the carbon bed.
Systems can also be configured around practical site constraints. Units may be positioned alongside one another or stacked where available plant space is limited.
Accurate airflow measurement is essential when selecting and sizing the system. Learn more about the how hi-flo performs for high airflow applications.
The activated carbon used within an odour control system should be selected according to the pollutants present in the contaminated air.
Standard carbon may be suitable for some volatile organic compounds and general industrial odours. Other applications may require chemically treated or impregnated carbon designed to capture specific contaminants such as hydrogen sulphide or ammonia.
Factors including contaminant concentration, humidity, temperature, airflow and required removal efficiency can all affect media selection.
Using inappropriate carbon can result in poor treatment performance or premature media replacement.
Exeon assesses the application and selects a carbon type suited to the expected emissions, helping maximise contaminant removal, carbon life and the overall efficiency of the hi-flo™ system. Read more about how the correct activated carbon is selected for contaminant removal.
Dust pre-filtration removes airborne particles before contaminated air enters the activated carbon bed.
Without suitable filtration, dust can collect within the carbon media, restrict airflow and increase the pressure across the system. It may also cover parts of the carbon surface, reducing the area available to adsorb gaseous pollutants.
This can shorten the working life of the carbon and increase fan energy requirements.
Pre-filtration is particularly important at waste facilities, refuse-derived fuel plants, food processing sites and industrial premises where the extracted air contains significant levels of particulate matter.
The hi-flo™ system can include accessible, individually sealed dust filters to protect the carbon bed and support straightforward inspection and replacement. Learn more about the importance of dust pre-filtration.
The working life of activated carbon depends on the contaminant load, airflow, humidity, media type and operating conditions.
Carbon used to treat low concentrations of pollutants may remain effective for a relatively long period. High concentrations, continuous emissions or unexpected process peaks can cause the media to become saturated more quickly.
Dust and moisture can also reduce performance if the air stream is not properly managed before it reaches the carbon bed.
Regular monitoring can help identify changes in removal efficiency and indicate when the media is approaching exhaustion.
Because every application is different, carbon life should be estimated using site data and confirmed through inspection, testing and ongoing system performance monitoring.
Activated carbon systems require planned inspection and maintenance to ensure air continues to pass evenly through the media bed.
Maintenance may include checking the fan, ductwork, pressure readings, dust filters, access seals, controls and exhaust stack. The carbon bed should also be inspected for compaction, uneven airflow or signs that the media is becoming saturated.
Pre-filters will need cleaning or replacement at intervals determined by the amount of dust in the incoming air.
Air samples or gas monitoring equipment may be used to compare contaminant levels before and after treatment.
When the carbon reaches the end of its useful life, it must be removed and replaced using appropriate handling and disposal procedures.
The hi-flo™ system can be used as a standalone treatment system or as one stage within a wider odour and emission control process.
Activated carbon is frequently installed after a biological filter or chemical scrubber as a final polishing stage. It can capture residual contaminants that remain after the primary treatment process and help a site achieve demanding discharge limits.
In other applications, pre-treatment may be required to remove high contaminant concentrations, dust or moisture before the air reaches the carbon.
A combined system may be suitable where emissions contain several pollutants or where concentrations fluctuate significantly.
The correct treatment arrangement should be based on air testing, process conditions, performance requirements and operating costs.
