Dissolved Air Flotation In Water Treatment

Advanced Technology DAF System for Grease Wastewater Treatment in Printing Shops

Dissolved Air Flotation In Water Treatment Grease Sewage DAF Unit For Printing Shops

DAF System Introduction

Dissolved Air Flotation is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids.

The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air atmospheric pressure in a flotation tank basin.

The released air forms tiny bubbles which adhere to the suspended matter causing the suspended matter to float to the surface of the water where it may then be removed by a skimming device.

DAF System Work Process

The wastewater enter RT1 (coagulation reaction tank) and RT2 (flocculation reaction tank) from the equalization tank through the lift pump, and coagulates with PAC floculates with (PAM) respectively form the flocs.

Then the wastewater and dissolved water enter the reaction zone of the DAF tank, and the microbubbles and flocs in the dissolved water are mixed and adhered to form solid particles ,which the density less than water, and float up to the surface of the DAF tank .

Under the action of buoyancy, scum is scraped to the slag tank. The clean water is collected down to the collect tank through the water collecting pipe, and most of the outer water is discharged (or into the next process), and a small part of the water is recirculated to form the dissolved water.

DAF System Features
1. Micro bubbles generating
2. Subsurface capture
3. Automatic slagging controlled by liquid level
4. Non-clogging releasing with high efficiency.

Application of DAF System
Municipal Sewage
Slaughter House
Metallurgical Industry Wastewater
Spraying Sewage
Printing & Dyeing Sewage
Metal-Processing Sewage
Mining Stone Wastewater
Electronic Sewage

How to select right model?
Wastewater type ( dairy wastewater , car washing wastewater ,slaughter house wastewater, food wastewater , river water …..)
SS content (ppm or mg/L)
Oil & Grease &Fat & FOG content (ppm or mg/L )
PH (6~9 is preferred . Otherwise consider PH adjust tank before DAF tank , also have to consider the material of the DAF because of Corrosive substance )
BOD (ppm or mg/L)
COD (ppm or mg/L)
DAF System for References

Shanghai Ecopro Environmental Engineering Co., Ltd. is the leading company in the field, specializing in providing comprehensive water and wastewater treatment equipment and separation services. As a professional environmental engineering company, we have always adhered to the spirit of craftsmanship since our establishment. Our goal is to provide the industry with high-quality equipment, services, and systematic solutions. Our product range includes static screens, rotary drum screens, lamella clarifier systems, dissolved air flotation systems, electrochemistry systems, screw presses, wave separators, filter presses, sludge dryers, Mutag BioChip 30TM, vibratory shear enhanced membrane systems, sodium hypochlorite generators, ozone generators, integrated dissolved air systems, integrated screw press systems, MBBR systems, integrated sewage treatment machines, static mixers, screw conveyors, roots blowers, sand filters, enamel assembled tanks, sand separators, sludge scrapers, and various types of pumps.