Odour management is one of the most persistent challenges facing waste treatment plants, wastewater facilities, and other process industries. Neighbours complain, regulators tighten limits, and traditional scrubbing or chemical dosing systems can be expensive, messy, and high-maintenance. Activated Air units offer a fundamentally different approach — using high-voltage, UV-catalysed chemistry to destroy odorous compounds at the molecular level, with no chemicals, no water, and no waste products.
What Are Activated Air Units?
Activated Air units are compact, packaged systems that generate a highly reactive gas stream capable of oxidising odour-causing molecules at high speed. Rather than masking or absorbing smells, they chemically break down the offending compounds into harmless substances such as carbon dioxide, water, and nitrogen — permanently and irreversibly.
At the heart of each unit is a wide-mesh, UV-light-generating catalytic wire mesh. A high voltage is applied across this mesh, splitting and energising molecules in ordinary ambient air. This process converts the moisture and oxygen in the air into a flow of unstable atoms, ions, and radicals with elevated electron activity — collectively known as Activated Air.
Once generated, this activated gas is injected directly into the odorous exhaust stream, where it attacks oxidisable compounds on contact.
Activated Air molecules oxidise odorous compounds so completely that the resulting molecules can no longer be detected by the human nose.
How the Technology Works
The process unfolds in a few key stages:
- Air intake – Ambient air is drawn into a stainless steel cabinet housing the UV catalysts, with no pre-treatment required.
- Dissociation – In the high-voltage environment surrounding the catalyst mesh, oxygen and water-vapour molecules are split apart.
- Formation of Activated Air – This dissociation produces a highly reactive gas mixture of unstable oxygen atoms, ions, and radicals with elevated electron energy levels.
- Injection and oxidation – The Activated Air is injected into the polluted exhaust stream, where it rapidly oxidises odour-causing molecules.
- Odour elimination – Once mixed in the correct proportions, the treated air loses its capacity to trigger a human sense of smell.
Because the reactions are irreversible, there’s no risk of odours reforming downstream — a key advantage over masking agents or temporary chemical treatments.
The same principle can also be applied more broadly, beyond odour control, to remove unwanted trace gases from industrial process streams.
Why Choose Activated Air Over Conventional Systems?
Traditional odour control methods — wet scrubbers, activated carbon, or chemical dosing systems — often come with significant operating burdens: chemical top-ups, wastewater discharge, moving parts, and regular consumable replacement. Activated Air units are designed to sidestep all of that.
Key Benefits
- Highly efficient odour control through high-rate oxidation of target substances
- Compact, packaged units that are easy to integrate into existing exhaust systems
- No moving parts and no mechanical wear, reducing breakdown risk
- No chemical additions required — the system generates its own reactive gas from ambient air
- No water consumption
- No waste products — the oxidation reactions produce only innocuous by-products
- Low energy requirements
- Minimal maintenance requirements
No chemicals, no water, no waste products — just ambient air and electricity turned into a powerful oxidising agent.
Technical Specifications
| Parameter | Specification |
|---|---|
| Flow rates available | 2,000–20,000 m³/hr of exhaust gas (larger flows via multiple modules) |
| Materials of construction | Stainless steel and high-resistance plastic composites |
| Energy requirements | 0.5 kWhr per 1,000 m³ |
| Chemicals required | None |
| Waste products | None |
| Pre-treatment requirements | None |
| Space requirements (largest standard module) | 1.5 m wide × 1.0 m deep × 2.4 m high (front access required) |
| Maintenance | Quarterly service visits recommended; catalyst performance checked annually |
| Operator skills required | None specific — one-hour training course is sufficient |
Sizing and Performance Testing
Because every odour source is different, Organics does not simply size a unit off the shelf. Each application undergoes a structured evaluation process to ensure the treatment objectives are met:
- Review of the process and exhaust air make-up
- Chemical composition analysis of the exhaust air, identifying and quantifying varying odour compounds where relevant
- Calculation of the theoretical oxidation requirement to size pilot trials
- On-site trials using a portable pilot plant unit
- Assessment of oxidation efficiency against flow rate and compound loading
- Final sizing of the full-scale treatment unit
This trial-based approach ensures that units are matched precisely to real-world conditions rather than generic assumptions — important given the wide variability of odour sources found in industrial and municipal facilities.
Applications
Activated Air units are suited to a wide range of variable-source odour problems, including exhaust gases from waste handling, composting, wastewater treatment, and other processes where volatile organic compounds or sulphurous odours are generated. They can be supplied as stand-alone packages or integrated into a complete system for the collection and treatment of odorous or oxidisable gas streams.
Key Takeaways
- Activated Air units use high-voltage UV-catalysed chemistry to convert ambient air into a highly reactive oxidising gas.
- This gas destroys odorous molecules irreversibly, converting them into harmless substances like CO₂, water, and nitrogen.
- The system requires no chemicals, no water, and produces no waste — with low energy use (0.5 kWhr per 1,000 m³) and minimal maintenance.
- Units handle flow rates from 2,000 to 20,000 m³/hr, with multiple modules available for larger applications.
- Every installation is preceded by site-specific analysis and pilot trials to ensure correct sizing and performance.
Get in Touch
If your facility is struggling with persistent odour complaints or needs a low-maintenance, chemical-free solution for exhaust gas treatment, our Technical Sales team can help assess your process stream and design a tailored Activated Air solution. Contact us today to discuss a site trial and find out how this technology could work for your operation.