The DAF FPBC dissolved air flotation system has been specifically designed for the treatment of industrial wastewater with low to moderate concentrations of suspended solids, fats, oils, and flocculated matter.

It is a vertically designed DAF system. Its tall profile reduces the space it occupies by optimizing the height of the equipment.

The DAF FPBC system incorporates an internal lamellar package. The lamellae are angled plates that increase the separation surface area, minimizing the water flow velocity and reducing the space occupied by the DAF equipment.

Sigmadaf offers a wide range of dissolved-air flotation systems, designed to accommodate a wide variety of flow rates and feed compositions.

DAF FPBC Specifications: Performance, Dimensions, and Technical Data

The DAF FPBC model offers excellent efficiency in removing organic matter, solids, fats, and other contaminants from wastewater.

DAF FPBC System Components

Top view

1. Sludge tray
2. Air diffuser
3. Chain
4. Worm screw
5. Shovel
6. Level Gauge
7. Clarification tank
8. Slats

Front view

1. Air Bleed Valve
2. Manifold
3. Pressurization Valves
4. Outlet for Floated Sludge
5. Water ingress
6. Outlet for Settled Sludge
7. Sludge Level Sensor
8. Pneumatic Control Panel
9. Skimmer motor

Side view

1. Pressure pipe
2. Safety valve
3. Pressure reading
4. Sampling
5. Suction pipe
6. Air Injection

Rear view

1. Pneumatic Control Panel
2. Clarified Water Tank Level Sensor
3. Water discharge
4. Worm Gear Motor

Available Materials

Stainless steel AISI 304

Standard construction materials for all our DAF systems, including the DAF FPBC model.

The DAF FPBC can also be manufactured from AISI 316 stainless steel upon customer request.

Polypropylene

The DAF FPBC system is manufactured from polypropylene when highly corrosive wastewater must be treated.

FPBC DAFs made of polypropylene offer high resistance to oxidation and chemical degradation.

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How does the DAF FPBC system work?

The FPBC model offers high separation efficiency while occupying significantly less space than a conventional DAF system, thanks to its compact design and the inclusion of a lamellar plate pack.

• Water Inlet and Floc Formation: Wastewater enters the unit after the coagulation and flocculation stages, where fine particles and colloidal matter aggregate to form larger flocs.
  The water is fed into the tank via a cross-flow system, which reduces the distance particles must travel to separate and improves hydraulic distribution within the unit.
• Microbubble Generation: A portion of the already clarified water is recirculated by a pump to the air-water saturator, where it is pressurized together with air. When this mixture is depressurized inside the DAF, millions of microbubbles are generated that adhere to the flocs. Their small size promotes a larger contact surface area and excellent adhesion to the particles, significantly increasing the efficiency of the flotation process.
• Countercurrent Flow Separation and Lamellar Pack: The distinguishing feature of the FPBC model is its countercurrent flow separation system combined with a pack of inclined lamellar plates installed inside the tank.
  These lamellae multiply the effective separation surface area without increasing the size of the equipment, reducing the rise velocity required for particles to float. As a result, even particles with low buoyancy can be separated efficiently.
  In addition, countercurrent flow improves the equipment’s hydraulic performance, prevents the formation of preferential flow paths, and ensures uniform water distribution throughout the lamellar plate pack, thereby increasing process efficiency.
  Thanks to this technology, the FPBC can operate under high hydraulic loads while maintaining excellent performance and a much more compact design than other DAF systems.
• Automatic sludge removal: The particles that rise, driven by microbubbles, form a layer of floating sludge on the surface of the unit, which is continuously removed by the sludge collection system.
  Any sediment that may settle at the bottom is automatically removed via a pneumatic purge valve.
  Each discharge cycle also generates a self-cleaning effect that helps dislodge particles adhering to the unit’s internal walls, reducing maintenance requirements and ensuring stable long-term operation.
• Clarified Water Outlet: Once contaminants have been removed, the clarified water leaves the unit with a quality suitable for the subsequent treatment stages.
  Part of this water is continuously recirculated to the saturation circuit to generate new microbubbles, creating a continuous, efficient, and energy-efficient process.

Advantages of the DAF FPBC Dissolved Air Flotation System

• Larger separation surface area, thanks to a set of angled lamellar plates that multiply the effective flotation surface area without increasing the unit's dimensions.
• Particularly effective with light and medium loads
• Improved hydraulic performance: The cross-flow design, combined with countercurrent separation, promotes faster separation, reduces turbulence, and minimizes the risk of solids being remixed.
• It takes up less space thanks to its tall profile and high surface efficiency.
• It produces sludge with a dry solids concentration 3 to 4 times higher than that of many conventional DAFs. This results in a smaller sludge volume, lower transportation costs, and lower dewatering costs.
• Less maintenance
• Excellent performance with difficult-to-treat particles such as light flocs, emulsified fats, oils, or particles with low rise velocity.

WHY CHOOSE THE DAF FPBC SYSTEM?

The DAF FPBC combines a counter-current flotation system with a lamella package that increases the effective separation surface area and enables high performance in a compact unit. This configuration makes it a particularly efficient solution for treating wastewater with low- to medium-level pollutant loads and low-buoyancy particles, where effective separation is required with a minimal installation footprint.