What Is a Floating Aerator?
A floating aerator is designed to provide the necessary aeration and mixing for the biological treatment process in wastewater treatment plants.
As the vertical shaft is rotated rapidly by an electric motor drive, the impeller sprays the wastewater across the tank promoting circulation and entraining air inside the wastewater.
This type of floating aerator consists of fully or partially submerged impallers that are attached to electric motors mounted on floating or fixed structures.
Top Benefits
- High efficiency & low energy use
– Turbine or impeller designs deliver around 2 kg O₂/kWh efficiency
– Significantly lower operating costs than systems with compressors and fine-bubble diffusers - Quick installation & retrofit-friendly
– Simply float, anchor, and connect to power—no need for basin emptying - Minimal maintenance
– Few moving parts, large clog-resistant intake, and durable materials like AISI 316 stainless steel - Adaptable & scalable
– Models from 1.5 kW to tens of kW, suitable for depths 0.6–5 m, with optional smart control
How It Works
- Draw: Water is pulled in from the basin via a submerged intake pipe.
- Agitate: An impeller or turbine accelerates the water into a spray or jet.
- Disperse: The water breaks the surface, absorbing oxygen from the air and circulating oxygen-rich water deeper into the basin
Common Applications
- Municipal and industrial lagoons, oxidation basins
- Equalization and pre-aeration tanks
- Odor-control and pre-treatment zones
- Cooling hot process water
Real-World Example
Roxia reports a Finnish plant where five 1.5 kW floating aerators stopped odor issues, prevented ice in winter, improved effluent quality, and allowed for remote setup and automated cleaning cycles—showing true Smart Aeration performance
Design Features
Feature | Description |
Power | Ranges from small (1.5 kW) to large-scale models |
Materials | Stainless steel, UV-resistant floats, PE intakes |
Controls | Optional VFDs, impeller-cleaning, DO/pH sensors |
Smart Systems | Platforms like Roxia Malibu™ offer online control & data reporting |
Why Vortex Engineering?
- Tailored solutions — Size and configure aerators for your basin’s unique geometry and process needs.
- Nationwide support — Based in Türkiye with local service and fast delivery.
- Competitive LCOE — Energy-efficient motors, corrosion protection, and sound maintenance planning.
- Modern automation — Optional DO/pH monitoring, remote access, and scheduled cleaning.
Implementation Tips
- Size aerators based on basin volume and required oxygen (e.g., 2 kg O₂/kWh at design flow).
- Place floats to ensure full mixing—avoid dead zones.
- Consider hybrid systems: floating aerators + diffused bubbles for deeper or high-effluent needs
- Include VFDs or DO-control systems to reduce energy use during low-demand periods .
Why Floating vs. Alternatives?
- Better than diffusers where fine bubbles clog easily or need frequent maintenance.
- Fewer structural requirements vs. fixed systems—ideal for retrofits and lagoons.
- Comparable or higher oxygen transfer than traditional surface aerators (SOTE up to 2.5 kg O₂/kWh at optimal speed)
Floating aerators offer a cost-effective, energy-efficient, and scalable solution for oxygenating and mixing wastewater. At Vortex Engineering, we design optimized systems with smart automation and enduring performance.
Ready to improve your wastewater aeration?
👉 Contact Vortex Engineering for a custom evaluation, product brochure, or quotation.
