Dissolved air flotation is one of the most effective methods whose specific gravity is close to 1.0 from water.Dissolved Air Flotation is liquid/solid or liquid/liquid separation process to remove tiny suspended solids that density close to the water, colloid , oil and grease etc.
NORSEN dissolved air flotation is an innovation combined with traditional dissolved air flotation concept and modern technology.
DAF dissolved air flotation consists of flotation tank, dissolved air system, reflux pipe, dissolved air released system, skimmer(Based on customer needs, there are combined type, traveling type and chain-plate type to choose.), electric cabinet and so on.
Air flotation separation technology of Norsen DAF dissolved air flotation dissolves air into water at certain working pressure. In the process, pressurized water is saturated with dissolved air and is discharged into a flotation vessel. The microscopic air bubbles produced by released air attach to suspended solids and float them to the surface, forming a sludge blanket. A scoop removes the thickened sludge. Finally, it complete purifies the water.
Air flotation technology of DAF dissolved air flotation plays an important role in solid-liquid separation (Simultaneously reduce COD, BOD, chroma, etc). Firstly, mix flocculating agent into raw water and stir thoroughly. After the effective retention time (lab determines the time, dosage and flocculation effect), the raw water enters into the contact zone where microscopic air bubbles adhere to the floc and then flows into the separation zone. Under the buoyancy effects, the tiny bubbles float the flocs to the surface, forming a sludge blanket. A skimming device removes the sludge into the sludge hopper. Then the lower clarified water flows into the clean-water reservoir through the collecting pipe. Some of water are recycled to the flotation tank for the air dissolving system, while others will be discharged.
Four comprehensive technologies：
● Micro bubble generating technology；
● Subsurface capture technology；
●Technology of automatic slagging controlled by liquid level；
●Non-clogging releasing technology with high efficiency；
Product Description Application Fields:
● Oil-water separation of wastewater in petrochemical industry and so on (including emulsified oil and vegetable oil)；
●Pretreatment of wastewater in the industries of textile, dyeing, bleaching, wool spinning；
● Wastewater treatment in surface treatment industry (such as galvanization, PCB, pickling)；
●Pretreatment of wastewater in industries of pharmacy,chemical, papermaking, tannery, slaughter, food and so on；
● As a replacement of sedimentation tank, the flotation is widely appliedin industrial wastewater pretreatment。
Empty load weight (T)
Full load weight (T)
Reflux Pump (kw)
Dissolved Air Flotation Water (m³/H)
Separation area (m³/H)
● High efficiency dissolved air system with dissolving efficiency reaches above 95%；
● Liquid level controlling for automatic slagging, slagging scum moisture content below 98%；
● High efficiency non-clogging releaser with particular purpose, easy maintenance, releasing rate above 95%;；
● Stable treatment efficiency, automatic control, unattended operation；
● Small footprint, high effluent quality, low investment；