Dissolved Air Flotation  System ( DAF System ) is the final stage of wastewater purification, typically following the application of the API system, which clarifies water by removing suspended materials such as oils, solids, and other contaminants.

In a DAF wastewater treatment system, fine air bubbles are introduced into the water. These microbubbles attach to suspended particles, causing them to float to the surface. The particles that float to the top form a layer known as a “float” or “scum” layer. This layer can then be easily skimmed off, effectively separating contaminants from the water. The remaining treated water, which is now free from suspended solids and other impurities, is collected from the bottom of the DAF tank.

This process is particularly effective in removing a variety of contaminants from industrial and municipal wastewater streams, making it an essential component in modern water treatment facilities. The treated water that exits the DAF system has undergone significant reduction in suspended solids, oils, grease, and other harmful substances, ensuring that it meets the required quality standards for discharge or reuse.

Key Advantages of the DAF Wastewater Treatment System :

One of the main advantages of the DAF system is its ability to effectively remove fine particles and colloidal substances from wastewater. This makes it an invaluable tool in various industrial and municipal wastewater treatment applications, where the removal of difficult-to-treat contaminants is a priority. The DAF system is highly effective in industries that generate complex wastewater with high levels of oils, fats, and other challenging contaminants.

In addition to its efficiency in contaminant removal, the DAF system also offers several other benefits:

• High Efficiency: The system can treat large volumes of water in a short amount of time, ensuring fast and efficient wastewater processing.
• Reduced Sludge Volume: By efficiently separating contaminants, the DAF system minimizes the amount of sludge that needs to be handled and disposed of.
• Low Maintenance Requirements: The DAF system is relatively low-maintenance, making it a cost-effective solution for long-term wastewater treatment needs.
• Versatility: It can be used in a wide range of industries, including food processing, petrochemical, pharmaceutical, and municipal wastewater treatment.

Overall, the Dissolved Air Flotation (DAF) system provides an efficient, effective, and environmentally friendly solution for removing contaminants from wastewater, contributing to cleaner water and a more sustainable future.

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How API Wastewater Treatment System works:

Wastewater enters the separator, and due to the tank’s design, the waste water remains for some amount of time that cause oil and solids to flow into the surface, forming a layer that can be skimmed off. Treated water exits from the bottom.

The next process for further purification is using DAF system.

using nonmetallic components for designing API wastewater treatment system

has following benefits, compared to metallic components:

• Durable and high resistance
• Reliable performance and very low energy consumption (up to 80% reduction)
• very high abrasion resistance compared to metal
• Very light and resistant to any chemical corrosion
• Reliable and low and easy maintenance
• Better lifetime up to 10 times more than metal components
• Silent operation while working

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Industrial Wastewater treatment

Due to its hazardous content, industrial wastewater needs to remove the Oil, Suspended Solid (SS), COD, BOD, T-P, T-N, pH etc. in order to reuse and/or meet the discharge limits of the required water quality.
Dissolve Air Floatation unit (DAF) is proposed with other API separator (primary treatment) to optimize the concentration of oil and other impurities from wastewater. Dissolved air flotation (DAF) is a clarification process that utilizes air to remove suspended matter from the surface of treated water. DAF works by dissolving air under pressure and then releasing millions of tiny air bubbles into the water at atmospheric pressure.
The API oil-water separator is a gravity separation device designed by using Stokes Law to define the rise velocity of oil droplets based on their density and size. The design of the API oil-water separator is based on the specific gravity difference between the oil and the wastewater because that difference is much smaller than the specific gravity difference between the suspended solids and water. Based on that design criterion, most of the suspended solids will settle to the bottom of the separator as a sediment layer, the oil will rise to top of the separator, and the wastewater will be the middle layer between the oil on top and the solids.

on the bottom Non-metallic equipment feature:

• With high strength and durability
• Reliable performance and very low energy consumption (up to 80% reduction) in comparison with metal, very high abrasion resistance
• Light weight and corrosion resistant to any chemical
• Reliable and easy to maintain
• Very long life up to 10 times longer than metal samples
• Silent performance during work
• Non-metallic collector component resist corrosion and are easy to install. Concentrated oil removal.
Responsive to variations in flow and load.
Oil recovery

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