Aerators and Mixers
Aerators for Effluent Treatment
100% oil-free wet motor, CFD engineering and mixing capacity of up to 12,000 m³/h. Complete solutions for municipal and industrial WWTPs.
Precision engineering
Hydropower Efficiency and Precision Engineering
All HIGRA aerators are developed based on hydrodynamic simulations (CFD), advanced prototyping and comparative OTR and SAE studies. This application engineering guarantees the best cost-benefit ratio, maximizing oxygen transfer with the lowest possible energy consumption.
100% oil-free engine
No oil or grease in the system. Zero risk of contamination and reduced maintenance.
CFD simulation
Layout and number of units defined by hydrodynamic models prior to installation.
High rate of OTR/SAE
Comparative studies guarantee the highest O₂ transfer per kWh consumed.
One-piece construction
Engine and hydraulic unit integrated in the same block. Fewer vibrations, fewer faults.
Low noise level
Fully submerged operation allows use in urban and residential environments.
2 to 80 HP
Complete range for activated sludge tanks up to large facultative lagoons.
Surface Aerator
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Cyclone aerator
The first surface aerator with submerged operation on the market. The Cyclone combines high efficiency, low noise levels and safe operation even in shallow or irregularly shaped ponds. Designed in monoblock construction with floating flow director, it extends the mixing range and oxygen incorporation with quiet and clean operation.
Technical differentials
- Floating flow director with height adjustment
- Operation at low water levels
- One-piece construction, submerged wet motor
- 304 stainless steel impeller
- Easy installation
Typical applications
- Shallow facultative ponds
- Stations near residential areas
- Retrofit of surface aerators
Complete performance tables, influence curves and detailed technical data are available in the catalog.
Submerged Aerator
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Tornado Submerged Aerator
The Tornado line is designed for complete mixing and aeration in complex geometry tanks and deep ponds. With the possibility of inclined installation up to 30° (0°, 15° and 30°) and unidirectional operation, Tornado promotes complete mixing and aeration in depth, eliminating dead zones and reducing hydraulic short circuits. Also available in a directional rotary version up to 160°.
Technical differentials
- Aspiration of atmospheric air, pure O₂ or reagents
- Axial impeller with high mixing capacity
- Flexible layout for multiple positions
- Submerged wet motor
- Installation on floats, chassis or fixed rods
Typical applications
- O₂ intermittent activated sludge systems
- Deep aerated lagoons
- Demand reactors
- Equalization tanks with sludge
- Post-aeration and biological polishing
Complete performance tables, influence curves and detailed technical data are available in the catalog.
Submerged Aerator
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Tornado Biturbo Submerged Aerator
Designed for intensive complete mixing in tanks and ponds with regular geometries, the Tornado Biturbo has two propellers in opposite directions, promoting bidirectional mixing and incorporation. Fixation rate of up to 80% of aspirated microbubbles. Available in the Rotating Biturbo version, which significantly increases the coverage area with the same power by rotating 180°, covering 45% more area than conventional models.
Technical differentials
- O₂ transfer rate of up to 80%
- Expanded coverage without increasing consumption
- Ideal for large water features or retrofitting
- Rotary version (Biturbo-R): +45% coverage area
Typical applications
- Homogenization tanks
- Complete mixing zones
- Municipal and industrial wastewater treatment plants
- Activated sludge systems
- Biological reactors
Complete performance tables, influence curves and detailed technical data are available in the catalog.
Submerged Aerator
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Submerged Propulsion Aerator (ASP)
Also known as a Fountain Propeller, the ASP HIGRA is a versatile solution for applications requiring simultaneous aeration and movement. Its vertical rotor generates a jet of water with strong propulsion, providing effective mixing and oxygen transfer with a visual effect similar to a fountain. Suitable for WWTPs as well as ornamental ponds, parks and zoos.
Technical differentials
- Floating installation, without civil works
- Long-range propulsion jet for oxygenating and moving sludge
- Low energy consumption with high O₂ transfer rate
- Easy installation and repositioning
Typical applications
- Aerated lagoons and equalization tanks
- Reduction of effluent temperature by dispersion
- Lakes in parks, squares and zoos
- Tanks with dead zones or need to suspend solids
Complete performance tables, influence curves and detailed technical data are available in the catalog.
Submerged mixer
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THS Submerged Mixer
The THS line is HIGRA's submerged mixing solution, designed for robust homogenization in tanks and ponds. With an axial rotor and high thrust diffuser, it creates a directed jet that recirculates the useful volume, promoting macro and micromixing with low energy consumption. In inclined arrangements, the jet describes a downward trajectory, sweeping the bottom and preventing sedimentation. Compatible with frequency inverters and with or without oxygen injection.
Installation Variations
- Attaches to the chassis at the bottom of the tank
- Floating via inclined buoy structure
- Customized structures according to tank or process
- Compatible with frequency inverters
Typical applications
- Complete mixing tanks
- Industrial ponds with sludge accumulation
- Anoxic reactors and denitrification
Complete performance tables, influence curves and detailed technical data are available in the catalog.
From diagnosis to commissioning
Complete Aeration and Mixing Systems
HIGRA doesn't just supply equipment. We deliver the complete solution: from the study of your plant to the start-up and training of the local team.
01
Load and Geometry Study
Analysis of oxygen demand, useful volume, geometry and depth of tanks or ponds.
02
CFD simulation and layout
CFD hydrodynamic modeling to define the ideal number of equipment, position and inclination.
03
Supply and installation
Equipment, flotation structures, electrical panels and all the items needed for the system.
04
Startup and Training
Technical commissioning and training of the local operational team for maximum performance.
Where HIGRA aerators operate
Field applications
From municipal wastewater treatment plants to food industries, HIGRA aerators operate in ponds, tanks and reservoirs all over Brazil. See some of the installations already in operation.
Cyclone surface aerator
Operating in a sanitation application
Tornado Aerator
Operating a sewage treatment plant
Submerged Aerator Propeller
Operating an effluent treatment system
Tornado Biturbo Aerator
Working in the dairy industry
Tornado Biturbo Rotary Aerator
Operating in a treatment tank
Reference case
Proven results in the field
Municipal Wastewater Treatment Plant | Itapira, SP
20 Tornado aerators in continuous operation since 2008
SAAE Itapira replaced inefficient surface aerators with Tornado HIGRA aerators. In continuous operation since 2008, the system has eliminated odours, stabilized the biological process and ensured continuous legal compliance without frequent corrective interventions.
~85%
Average removal efficiency
20×
Tornado 25 HP Aerators
+16
Years in continuous operation
Frequently asked questions
Questions about aerators for wastewater treatment
The submerged aerator (such as Tornado and ASP) operates below the water table, sucking in atmospheric air and incorporating oxygen directly into the effluent, with greater efficiency at depth. The surface aerator (such as the Cyclone) combines surface operation with submerged technology, making it ideal for shallow lagoons and stations near residential areas due to its low noise level.
Technical brochure
HIGRA 2026 Aerators and Mixers Catalog
Access the complete performance tables, influence curves, technical data by model and equipment selection guide.
- Performance tables by line (Cyclone, Tornado, Biturbo, ASP, THS)
- OTR, SAE and mixing capacity data per model
- Comparative curves and zones of influence
- Selection guide and typical applications
- Technical specifications for projects and tenders
Aerators and Mixers Catalog
Edition 2026 - Rev. 00
Get in touch
Request a proposal or technical analysis
Our application engineers will analyze your plant and recommend the ideal aeration system.
- Load study and tank geometry
- CFD simulation of equipment layout
- Technical and economic comparison between lines
- Detailed commercial proposal
- After-sales support HIGRA Customer Service
