Dissolved Air Flotation - Model DAF Wastewater Treatment Systems
From Wastewater Treatment
The DAF process consists of super saturation of discharge water from the effluent end of the DAF tank with air. The super saturated water stream is then mixed with the wastestream. As pressure is removed from the saturated stream millions of microscopic bubbles form and attach themselves to the contaminants in the wastewater, thereby changing their buoyancy and floating them to the water surface where they can be skimmed and removed from the water. We offer our unique 'Dinky DAF' design for small DAF applications up to 36 sq. ft. Chemical pre-treatment systems can be provided where required.
Chemical pretreatment often improves DAF solids re...
Chemical pretreatment often improves DAF solids removal efficiencies. The use of chemical flocculants with DAF is based on system efficiency, application (use of DAF) contaminant characteristics and cost. Commonly used chemicals include trivalent metallic salts of iron, such as FeC12 or FeSO4 or aluminum, such as AISO4. Organic and inorganic polymers (cationic or anionic) are often used to enhance the flotation process. The most commonly used inorganic polymers are the polyacrylamides.
Options
- 304/316 Stainless Construction
- Emulsion Breaking System
- Chemical Pretreatment
- Sludge Pumpout
- Float Pumpout
- Effluent Pumpout
- Influent Feed
- pH Adjustment System
- Effluent Filtration System
- Vapor Cover
- Alternate Wiper Materials
- Walkways/Stairs
- Flow Meter
- Flatbottom Designs
Applications
- Vehicle Wash Racks
- Animal Processing Plants
- Military Wash Racks
- Industrial Process Water
- Steel Mills
- Tank Farms
- Petro-Chemical
Skimoil`s DAF design incorporates today`s "state o...
Skimoil's DAF design incorporates today's 'state of the art' technology in DAF design. This design simplifies the DAF process, requires less startup time, less capital cost, instrumentation, labor and maintenance. The design is process friendly, providing virtually instant saturation upon sytem startup without equalization and complex startup procedures. Higher air transfer efficiencies are also realized due to higher saturation pressures with 12% @ 93% entrainment. Skimoil can provide both styles of DAF design depending on application and customer preferences.
Conventional DAF design uses a recycle pump combin...
Conventional DAF design uses a recycle pump combined with an air saturation vessel and air compressor to dissolve air into the water. This design requires an equalization period to balance the air and water pressures in the saturation vessel. Typically, this design operates under lower pressures than our design shown above.
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