The Hydro-Industrial DAF is a high-performance dissolved air flotation system optimised for removing nuisance and by-product materials from industrial water and wastewater, enabling businesses to save money on effluent surcharges, treatment costs and equipment wear and tear.

Capturing oil products, suspended solids, fats and other materials that are not dissolved, its high purification efficiency means that wastewater meets quality standards appropriate for discharge into city sewer networks.

Its high performance and removal efficiency prevents materials from passing downstream, preventing the clogging, blockages and abrasion damage that can cause costly downtime or shorten equipment lifetimes.


  • Meat and poultry slaughter and processing
  • Dairy and milk processing
  • Fish canning
  • Oil and fat processing
  • Chemicals and petrochemicals
  • Textiles and leather production
  • Iron and steelmaking

Designed for

Fine particles
Industrial materials
Oils & hydrocarbons


Reduce surcharge costs and prevent compliance breaches by discharging treated, environmentally compliant effluent. 

Cut treatment costs by eliminating the need for additional water treatment processes.

Improve operational efficiency with automated processes and low-input uninterrupted operation.

Prevent downstream damage, blockages and wear through reliable capture of abrasive and clogging materials.

Discharge directly into city networks - generate effluent with high purification efficiency.

How it works

How it works

Initial wastewater is pumped to the mixer inlet (flocculator), where the wastewater is treated with reagents. Treated effluents enter the mixing chamber of the flotator with a simultaneous supply of a water-air mixture. The air bubbles and waste form flotation complexes that float to the surface.

Larger flotation complexes reach the surface in the mixing chamber, while the rest passes along with the waste water to the flotation chamber, where it is separated from the liquid.

The resulting foam is removed from the surface of the water with a scraper mechanism and discharged into the collection tray. Heavy contaminants settle on the bottom, from where they are removed through a special pipe.

Clarified wastewater is discharged through a controlled overflow into the tank for purified water and removed from the installation. Part of the purified water is taken by the recirculation pump to saturate it with air.

After that, the air-water mixture is distributed for dispersed supply into the flotation and reagent wastewater treatment areas.

Technical information

Technical information

Removal rates

  • COD: 80%
  • TSS: 98%
  • FOG: 95%
  • Phosphates: 90%
  • Sulfides: 99%
  • Metals: 95%

Technical specifications

  • Recirculation coefficient: 20-200%
  • Recycle pressure: 75-95 psi
  • Flotation surface area: 0.5-21 m2
  • Lamella block volume: 0.15-16 m3
  • Effective lamella block surface: 5-93 m2


  • Self-cleaning system extends the equipment routine cleaning period
  • Polyurethane scrapers guarantee long service life
  • Adjustable scraper mechanism enables the system to handle large volumes of flotation sludge and foam
  • Safety and convenience: ventilation box, explosionproof design, foam extinguishing devices, service platforms
  • Automatic integration with related equipment such as mechanical cleaning units, tanks, conveyors etc
  • Material options include AISI 304 stainless steel, AISI 316 or fibre-reinforced polymer


Case Studies

Case Studies