Dissolved Air Flotation (DAF) Systems

PureCreek Environmental Services Inc. provides high-performance DAF units designed for efficient separation of suspended solids, oils, and grease from wastewater.

DAF technology is an essential stage in physical-chemical treatment — delivering clarified water with minimal energy consumption.

How Dissolved Air Flotation Works

Dissolved Air Flotation operates by saturating a portion of the treated water with air under pressure.
When pressure is released, fine micro-bubbles (20–80 µm) form and attach to suspended solids, fats, and other impurities, causing them to float to the surface.
The floating sludge layer is continuously removed by a scraper, while the clarified water flows out through an underflow channel.

Key Features of DAF

• Fine air bubbles (20–80 µm) for high separation efficiency
• Compact footprint and modular design
• Low power consumption and easy maintenance
• Automatic sludge skimmer and level control
• Stainless steel construction (AISI 304/316)
• Integration with polymer/coagulant dosing systems

Applications of DAF

• Municipal wastewater pretreatment
• Food and beverage industry (dairies, slaughterhouses, breweries)
• Petrochemical and oil separation
• Textile, pulp & paper, tannery wastewater
• Sludge thickening before dewatering

DAF Configurations

• Circular DAF Units — compact design for small to medium flows
• Rectangular DAF Units — suitable for high-capacity industrial plants
• Pressurized Air-Saturation Systems — for micro-bubble generation
• Lamella Plate DAFs — for enhanced clarification efficiency

DAF Integration

DAF systems are typically combined with:

• Polymer Preparation Stations for chemical conditioning
• Screw Press or Belt Filter Presses for sludge dewatering
• Equalization tanks and pH adjustment systems

Advantages of DAF

• Rapid and efficient solid-liquid separation
• Reduced chemical and sludge disposal costs
• Stable operation under variable loads
• Suitable for both retrofits and new installations

Technical Parameters (typical range)

PureCreek DAF systems ensure high separation efficiency, low energy use, and long-term operational stability — ideal for both municipal and industrial wastewater treatment facilities.