Dissolved Air Flotation (DAF) System
High-Efficiency Wastewater Clarification for Industrial and Municipal Applications
The AQUIPTECH Dissolved Air Flotation (DAF) System provides advanced solid-liquid separation using ultra-fine bubble technology and automated operation.
Engineered for industrial and municipal wastewater treatment, the system removes suspended solids, fats, oils, and grease to deliver crystal-clear effluent while reducing operating costs and maintenance.
Key Benefits
- Ultra-Fine Bubbles (≤10 µm): Achieves superior solid-liquid separation and high effluent clarity.
- High Dissolved Gas Efficiency (>95%): Ensures stable, consistent flotation performance.
- Compact Footprint: Optimized design minimizes land area requirements.
- Effluent Quality: Suspended solids (SS) typically <20 mg/L.
- Fully Automated: One-button start and unattended operation for ease of use.
- Cloud-Based Digital Control: Optional AQUIPTECH Cloud Service for remote monitoring and data logging.
Working Principle
The DAF process dissolves compressed air into water under high pressure, forming a supersaturated solution. When this solution is released into the flotation tank at atmospheric pressure, millions of microbubbles (20–50 µm) attach to suspended particles and oils.
The buoyant bubble-particle aggregates rise to the surface to form a sludge layer, which is continuously skimmed off. The clarified water is then discharged or recycled for reuse, achieving cost-efficient wastewater treatment and compliance with environmental standards.
Features
Standard Features
– Microbubble generation ≤10 µm for effective flotation.
– 95% dissolved gas efficiency.
– Compact, modular construction.
– Low effluent suspended solids (<20 mg/L).
– Fully automated operation with one-touch start.
– Compatible with AQUIPTECH Cloud Service for smart control.
Options & Accessories
– Flow capacities available from 5 to 100 m³/h.
– Carbon steel construction as standard; stainless steel or FRP available on request.
– Custom skimmer, air compressor, and reflux pump configurations.
– Optional chemical dosing and sludge dewatering modules for turnkey installations.
– Seamless integration with AQUIPTECH Flocculant Dosing and Sludge Dewatering Systems.
Specifications and Parameters
| Model | Capacity (m³/h) | L (mm) | W (mm) | H (mm) | Net Wt (T) | Running Wt (T) | Total Power (kW) | Reflux Pump (kW) | Air Compressor (kW) | Skimmer (kW) | Mixer1 (kW) | Mixer2 (kW) | Material |
| AQT-DAF005 | 5 | 2800 | 1000 | 2100 | 3 | 8 | 4.75 | 3 | 0.55 | 0.1 | 0.55 | 0.55 | Carbon steel |
| AQT-DAF010 | 10 | 3200 | 1200 | 2200 | 4 | 12 | 4.75 | 3 | 0.55 | 0.1 | 0.55 | 0.55 | Carbon steel |
| AQT-DAF025 | 25 | 5000 | 1500 | 1350 | 5.5 | 21 | 5.85 | 3.7 | 0.75 | 0.1 | 0.75 | 0.75 | Carbon steel |
| AQT-DAF050 | 50 | 6500 | 2000 | 2500 | 7 | 36 | 9.05 | 5.5 | 1.5 | 0.2 | 1.1 | 1.1 | Carbon steel |
| AQT-DAF080 | 80 | 7600 | 2600 | 2600 | 9 | 55 | 11.05 | 7.5 | 1.5 | 0.2 | 1.1 | 0.75 | Carbon steel |
| AQT-DAF100 | 100 | 8300 | 3000 | 3000 | 12 | 70 | 16.2 | 7.5 | 2.2 | 0.4 | 1.5 | 1.1 | Carbon steel |
Frequently Asked Questions (FAQ)
AQUIPTECH DAF systems are widely applied in:
• Food & beverage – removing fats, oils, and suspended solids from wash water.
• Mining & mineral processing – for tailings clarification and solid recovery.
• Oil & gas – for separating emulsified oil and hydrocarbons from produced water.
• Pulp & paper – for fiber recovery and effluent clarification.
• Municipal wastewater treatment – as a primary or tertiary clarifier.
Each unit is designed to meet your industry’s flow rate, contaminant load, and discharge standards.
• Food & beverage – removing fats, oils, and suspended solids from wash water.
• Mining & mineral processing – for tailings clarification and solid recovery.
• Oil & gas – for separating emulsified oil and hydrocarbons from produced water.
• Pulp & paper – for fiber recovery and effluent clarification.
• Municipal wastewater treatment – as a primary or tertiary clarifier.
Each unit is designed to meet your industry’s flow rate, contaminant load, and discharge standards.
Our DAF systems use ultra-fine bubble generation (≤10 µm) and >95% gas dissolution efficiency, delivering faster, more complete solid removal with lower energy use.
Combined with automated control and cloud-connected performance monitoring, AQUIPTECH DAF systems provide consistent results, minimal downtime, and reduced operator intervention — making them ideal for both continuous and batch operations.
Combined with automated control and cloud-connected performance monitoring, AQUIPTECH DAF systems provide consistent results, minimal downtime, and reduced operator intervention — making them ideal for both continuous and batch operations.
Typical treated water achieves:
• Suspended Solids (SS): <20 mg/L
• Oil & Grease (O&G): <10 mg/L (depending on influent)
These values comply with most Australian EPA discharge limits and allow for onsite water recycling in process or non-potable applications.
• Suspended Solids (SS): <20 mg/L
• Oil & Grease (O&G): <10 mg/L (depending on influent)
These values comply with most Australian EPA discharge limits and allow for onsite water recycling in process or non-potable applications.
Yes. Each unit includes a PLC-based control system with automated start-up, shutdown, and process balancing.
Integrated sensors monitor flow, pressure, and sludge levels, adjusting in real time.
Optional AQUIPTECH Cloud Digital Service enables full remote access, live data visualization, and automated alert notifications — reducing the need for onsite supervision.
Integrated sensors monitor flow, pressure, and sludge levels, adjusting in real time.
Optional AQUIPTECH Cloud Digital Service enables full remote access, live data visualization, and automated alert notifications — reducing the need for onsite supervision.
Absolutely. The variable-speed drive (VSD) pumps and adjustable air injection system allow the DAF to maintain performance under changing influent flow or concentration.
For highly variable applications, AQUIPTECH engineers can design a buffer tank or equalization basin to ensure optimal and stable DAF performance.
For highly variable applications, AQUIPTECH engineers can design a buffer tank or equalization basin to ensure optimal and stable DAF performance.
Standard construction is carbon steel with epoxy coating, suitable for most industrial effluents.
Optional upgrades include:
• 304/316 Stainless Steel – for corrosive or high-salinity wastewater.
• HDPE or FRP – for lightweight or chemical-resistant applications.
All models are manufactured in compliance with Australian Standards (AS4100 / AS1210).
Optional upgrades include:
• 304/316 Stainless Steel – for corrosive or high-salinity wastewater.
• HDPE or FRP – for lightweight or chemical-resistant applications.
All models are manufactured in compliance with Australian Standards (AS4100 / AS1210).
Yes. The AQT-DAF can be part of a closed-loop water recycling system.
After flotation, clarified water can be reused for:
• Process washing
• Cooling systems
• Irrigation or dust suppression
This reduces both freshwater consumption and trade waste discharge fees, supporting sustainable plant operations and ESG goals.
After flotation, clarified water can be reused for:
• Process washing
• Cooling systems
• Irrigation or dust suppression
This reduces both freshwater consumption and trade waste discharge fees, supporting sustainable plant operations and ESG goals.
The DAF system is designed for low maintenance. Routine actions include:
• Inspecting air diffusers, pumps, and skimmers.
• Cleaning scraper arms and checking sludge discharge lines.
• Verifying air compressor pressure and nozzle condition.
• Periodic lubrication and filter replacement.
AQUIPTECH systems feature maintenance alerts and optional remote diagnostics to prevent unexpected downtime.
• Inspecting air diffusers, pumps, and skimmers.
• Cleaning scraper arms and checking sludge discharge lines.
• Verifying air compressor pressure and nozzle condition.
• Periodic lubrication and filter replacement.
AQUIPTECH systems feature maintenance alerts and optional remote diagnostics to prevent unexpected downtime.
Yes. The DAF integrates seamlessly with:
• Coagulation & Flocculation Systems (AQT-FDS)
• Sludge Dewatering Units (AQT-SDS)
• Filtration and Membrane Systems
This modular compatibility allows AQUIPTECH to provide complete turnkey treatment plants, from raw water intake to final discharge.
• Coagulation & Flocculation Systems (AQT-FDS)
• Sludge Dewatering Units (AQT-SDS)
• Filtration and Membrane Systems
This modular compatibility allows AQUIPTECH to provide complete turnkey treatment plants, from raw water intake to final discharge.
Yes. AQUIPTECH offers comprehensive lifecycle support:
• System design and custom engineering
• Factory testing and certification
• Onsite installation and commissioning
• Operator training and maintenance manuals
• 24/7 technical assistance via AQUIPTECH Cloud Service
Our team ensures each DAF unit runs efficiently, complies with regulations, and meets your long-term performance requirements.
• System design and custom engineering
• Factory testing and certification
• Onsite installation and commissioning
• Operator training and maintenance manuals
• 24/7 technical assistance via AQUIPTECH Cloud Service
Our team ensures each DAF unit runs efficiently, complies with regulations, and meets your long-term performance requirements.