Biological treatment of wastewater relies on one critical ingredient: oxygen. Aerobic micro-organisms need a steady, well-distributed supply of dissolved oxygen to break down organic pollutants efficiently. Traditional aeration methods, however, can be energy-intensive and noisy, and they don’t always mix the liquor as thoroughly as treatment processes demand. Venturi aerators offer a smarter alternative — combining vigorous mixing with highly efficient oxygen transfer in a single, low-maintenance unit.
What Is a Venturi Aerator?
A venturi aerator uses the physics of the venturi effect to draw air into a liquid stream and disperse it as fine bubbles, maximising the surface area available for oxygen to dissolve into the liquid. The JetOX aerator, developed by Organics, is a multi-purpose venturi aerator engineered for exactly this purpose — forcing up to 35% of the oxygen in air into true solution, a figure well above what many conventional aeration systems achieve.
Organics’ JetOX venturi aerator can transfer up to 35% of the oxygen contained in air into true solution — delivering significant energy-cost savings compared to traditional aeration methods.
Because air is entrained directly within the venturi jet, a separate compressed air supply is not required for the self-entraining version, simplifying installation and reducing the number of moving parts that need maintenance.
How It Works: Jet Mixing Meets Aeration
The JetOX system operates by pumping liquor through a venturi body, which entrains air into the jet before it discharges into the tank. This produces two simultaneous effects:
- Oxygen transfer – the entrained air is broken into fine bubbles and dissolved into the liquid, supporting aerobic biological activity.
- Jet mixing – the high-velocity discharge creates a shearing motion throughout the liquor, achieving a homogenous mix without any additional mechanical mixing equipment.
The unabsorbed portion of entrained air continues to jet through the liquor mass, reinforcing the mixing action and helping to keep solids in suspension. This prevents settlement and compaction — a common issue in tanks and lagoons handling sludges and slurries.
Unlike surface aeration systems, the JetOX design does not create an aerosol effect. This is a significant advantage on odour-sensitive sites, since it reduces the risk of airborne odour dispersal while also operating at a lower noise level than typical surface aerators.
Key Features at a Glance
- Simple installation, operation, and maintenance
- Ideal for combined mixing and aeration of sewage, leachate, and organic industrial effluent
- No compressed air supply needed — air is self-entrained in the venturi jet
- Can supply supplementary oxygen during breakdown or overload conditions
- Low noise levels compared to surface aeration systems
- No aerosol effect, reducing airborne odour risk
- Suitable for tanks and lagoons where water level varies
Performance Data
The JetOX aerator is available in two configurations: a blower-assisted unit, which supplements the venturi’s self-entrainment with an air blower for higher oxygen transfer rates, and a self-entraining unit, which relies solely on the venturi effect to draw in air.
Blower-Assisted Unit
| Operating Depth (m) | O₂ Transfer (kg O₂/hr max) | Efficiency (kg O₂/kWh) | Pump Motor Power (kW) | Absorbed Power (kW max) |
|---|---|---|---|---|
| 2 | 14.3 | 2.2 | 3 | 2.8 |
| 4 | 29.4 | 2.0 | 3 | 2.8 |
| 6 | 47.8 | 2.4 | 3 | 2.8 |
| 8 | 52.2 | 2.4 | 3 | 2.8 |
Note: efficiency data allows for the absorbed power of an air blower.
Self-Entraining Unit
| Operating Depth (m) | O₂ Transfer (kg O₂/hr max) | Efficiency (kg O₂/kWh) | Pump Motor Power (kW) | Absorbed Power (kW max) |
|---|---|---|---|---|
| 2 | 11.3 | 1.3 | 11 | 8.9 |
| 4 | 11.4 | 1.3 | 11 | 8.9 |
| 6 | 10.4 | 1.2 | 11 | 8.9 |
| 8 | 10.3 | 1.2 | 11 | 8.9 |
The blower-assisted unit achieves notably higher oxygen transfer efficiency (up to 2.4 kg O₂/kWh) than the self-entraining unit, making it well suited to high-duty applications where oxygen demand is significant.
Applications Across Industries
Effluents and sludges amenable to aerobic microbial treatment arise across a wide range of sectors. The JetOX aerator’s flexibility makes it suitable for:
- Landfill leachate treatment
- Aerobic mesophilic digestion of sludges
- Sewage treatment — settled sludge and biological liquor treatment sludge
- Consolidation of anaerobically digested sludges
- Odorous component removal from effluent and sludges
- Anaerobic digester mixing (using biogas as the entrained gas)
- Food processing, dairy, brewing, and distilling industries
- Intensive agricultural activities, such as farm slurries
- Cosmetic and pharmaceutical industry
- Pulp and paper industry
- Chemical and petrochemical industry
- Oxidation ditches and lagoons
- Drop-in units for emergency treatment
- Textile industry
This breadth of use reflects how central aeration and mixing are to modern wastewater treatment processes, regardless of the industry generating the effluent.
Built for Easy Maintenance
JetOX aerators are typically mounted with their barrels passing through the tank wall, allowing the pump and venturi body to be positioned dry outside the tank for straightforward maintenance access. Where units must be submerged, flexible air feed connections allow them to be lifted out for inspection with comparative ease.
The venturi nozzles themselves are maintenance-free, and in the rare event of damage or abrasive wear, they can be replaced without difficulty. Where large abrasive solids are expected in the influent, appropriate filtration and screening should be incorporated into the system design to protect the pump, which is otherwise tolerant of typical process solids.
Key Takeaways
- JetOX venturi aerators combine jet mixing and oxygen transfer in one submerged system, eliminating the need for separate mixing equipment in many applications.
- Up to 35% of oxygen in air can be transferred into true solution, offering meaningful energy savings over conventional aeration.
- Two configurations — blower-assisted and self-entraining — allow the system to be tailored to different oxygen demand and energy-efficiency requirements.
- No aerosol effect and low noise output make JetOX a strong fit for odour- and noise-sensitive sites.
- Applications span landfill leachate, municipal sewage, agricultural slurries, and a wide range of process industries.
Get in Touch
If you’re evaluating aeration and mixing solutions for a leachate lagoon, sludge digester, or industrial effluent treatment system, our team can help you determine whether a blower-assisted or self-entraining venturi aerator configuration best suits your site’s oxygen demand and operating conditions. Contact us today to discuss your project and request further technical information.